Motor assembly and sweeping robot

Abstract

The present invention discloses a motor assembly and a sweeping robot. The motor assembly includes a housing, a driving assembly and a sealing assembly. An accommodating cavity is formed inside the housing, and the housing is also provided with a first opening connected to the accommodating cavity; the driving assembly is arranged in the accommodating cavity; the sealing assembly includes a first end cover, a first sealing member and a clamping member, the first end cover is fixed to one end of the housing, the clamping member is movably connected to one end of the first end cover facing the driving assembly, the first sealing member is clamped between the first end cover and the clamping member, the clamping member moves toward the first end cover and squeezes the first sealing member, so that the first sealing member abuts against the inner wall surface of the housing to seal the first opening. The technical solution of the present invention aims to optimize the structure of the motor assembly, reduce the difficulty of assembling the motor assembly, and improve the sealing and protection performance of the motor assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of sweeping robots, and in particular to a motor assembly and a sweeping robot using the motor assembly. Background Art

[0002] In order to reduce the size of the sweeping robot, some sweeping robots use a drum motor as the driving component of the sweeping robot. Since there is a lot of dust and water in the working environment of the sweeping robot, its working environment is harsh, and the sealing and protection performance of the driving components is also one of the important factors affecting the sweeping robot. Therefore, it is necessary to set a seal on the open end of the shell to waterproof the internal components. In the related art, the seal needs to be first put on the surface of the end cover, and then the end cover and the seal are put into the shell. When fitting, the seal and the inner wall of the shell are squeezed and rubbed for a long distance, causing the shell to damage the seal, affecting the sealing and protection performance of the seal. In addition, this assembly method also increases the difficulty of assembling the seal and the shell. Summary of the invention

[0003] The main purpose of the present invention is to provide a motor assembly, aiming to optimize the structure of the motor assembly, reduce the difficulty of assembling the motor assembly, and improve the sealing and protection performance of the motor assembly.

[0004] To achieve the above object, the motor assembly proposed by the present invention includes:

[0005] A housing, wherein a receiving cavity is formed inside the housing, and the housing is further provided with a first opening communicating with the receiving cavity;

[0006] a driving assembly, the driving assembly being disposed in the accommodating cavity; and

[0007] A sealing assembly, the sealing assembly comprising a first end cover, a first sealing member and a clamping member, wherein the first end cover is fixed to one end of the housing, the clamping member is movably connected to one end of the first end cover facing the driving assembly, and the first sealing member is clamped between the first end cover and the clamping member;

[0008] The clamping member can move toward the first end cover and press the first sealing member so that the first sealing member abuts against the inner wall surface of the housing to seal the first opening.

[0009] In one embodiment of the present invention, a connecting hole is provided on the end surface of the first end cover, and the clamping member is provided with a first threaded hole. A screw passes through the connecting hole and cooperates with the first threaded hole. The screw rotates relative to the first end cover to move the clamping member relative to the first end cover.

[0010] In one embodiment of the present invention, the clamping member includes a connected cylinder and a clamping plate, the cylinder is provided with the first threaded hole, the clamping plate is connected to one end of the cylinder away from the first end cover, the clamping plate is arranged to protrude from the side wall surface of the cylinder, and the first sealing member is sleeved on the side wall surface of the cylinder and respectively abuts against the end face of the first end cover and the surface of the clamping plate.

[0011] In one embodiment of the present invention, the outer diameter of the cylinder gradually increases from one end of the first end cover toward one end of the clamping plate.

[0012] In one embodiment of the present invention, a recessed groove is formed on the surface of the first end cover facing the clamping member, and when the clamping member moves toward the first end cover, a part of the structure of the cylinder body can be inserted into the recessed groove.

[0013] In one embodiment of the present invention, the first sealing member comprises:

[0014] A main body, which is annularly arranged and sleeved on the side wall of the cylinder, and whose two ends are respectively in contact with the end surface of the first end cover and the surface of the clamping plate; and

[0015] A sealing portion is protruding from a side wall surface of the main body.

[0016] In one embodiment of the present invention, the first sealing member further comprises an extrusion portion, the extrusion portion is connected to one end of the main body portion close to the clamping plate, the extrusion portion abuts against a surface of the clamping plate and protrudes from the surface of the main body portion.

[0017] In one embodiment of the present invention, the cylinder is open at both ends, and the motor assembly further includes a second seal, which seals the opening of the cylinder, and the second seal is further provided with a wire hole;

[0018] The first end cover is also provided with a wiring hole, and the wiring hole communicates with the accommodating cavity and the wiring hole.

[0019] In one embodiment of the present invention, the housing is further provided with a second opening communicating with the accommodating cavity, and the second opening is arranged opposite to the first opening;

[0020] The motor assembly also includes a second end cover and a third seal. The second end cover is connected to an end of the shell away from the first opening. The second end cover is also connected to the drive assembly. The third seal is clamped between the second end cover and the drive assembly and abuts against the inner wall surface of the shell to seal the second opening.

[0021] The present invention also provides a sweeping robot, which comprises the motor assembly.

[0022] The motor assembly in the technical solution of the present invention includes a housing, a drive assembly and a sealing assembly. Among them, the drive assembly is arranged in the accommodating cavity, and the sealing assembly includes a first end cover, a first sealing member and a clamping member. The first end cover is fixed to the housing, and the clamping member is movably connected to one end of the first end cover facing the drive assembly, and the first sealing member is clamped between the first end cover and the clamping member. When the motor assembly is assembled, the first sealing member is first pre-fixed between the first end cover and the clamping member to form a pre-assembled assembly, and then the entire pre-assembled assembly is put on the opening of the housing. When the first end cover is locked and fixed with the housing, the clamping member can be moved so that the clamping member moves toward one end of the first end cover, thereby squeezing the first sealing member, so that the first sealing member is expanded outward by the squeezing force and abuts against the inner wall surface of the housing to seal the first opening. Since the first seal does not have excessive contact, extrusion and friction with the shell during assembly, it not only reduces the assembly difficulty between the first end cover and the shell and improves the assembly efficiency, but also avoids damage to the first seal during the assembly process, ensures the sealing effect of the first seal, and improves the sealing protection performance of the motor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a motor assembly of the present invention;

[0025] Figure 2 for Figure 1 A cross-sectional view of a motor assembly in FIG.

[0026] Figure 3 for Figure 2 A magnified view of part A in FIG.

[0027] Figure 4 for Figure 2 A schematic diagram of the structure of the first end cover;

[0028] Figure 5 for Figure 2 Schematic diagram of the structure of the extruded part;

[0029] Figure 6 for Figure 2 Schematic diagram of the structure of the first seal.

[0030] Description of Figure Numbers:

[0031] Label name Label name 100 Motor components 33 First seal 10 case 331 Main body 11 First opening 333 Sealing part 13 Second opening 335 Extrusion Department 20 Drive components 35 Clamping parts 21 Motor 351 Cylinder 23 Gearbox 3511 First threaded hole 30 Sealing components 353 Splint 31 First end cap 40 Second seal 311 Connection hole 50 Second end cap 313 Give way slot 60 The third seal 315 Cable routing hole 70 Thermal Conductors

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The present invention provides a motor assembly 100 .

[0038] Reference Figures 1 to 6In one embodiment of the present invention, the motor assembly 100 has a housing 10, wherein a receiving cavity (not shown) is formed inside the housing 10, and the housing 10 is further provided with a first opening 11 communicating with the receiving cavity;

[0039] a driving assembly 20, wherein the driving assembly 20 is disposed in the accommodating cavity; and

[0040] The sealing assembly 30 includes a first end cover 31, a first sealing member 33 and a clamping member 35. The first end cover 31 is fixed to one end of the housing 10. The clamping member 35 is movably connected to one end of the first end cover 31 facing the driving assembly 20. The first sealing member 33 is clamped between the first end cover 31 and the clamping member 35. The clamping member 35 moves toward the first end cover 31 and squeezes the first sealing member 33 so that the first sealing member 33 abuts against the inner wall surface of the housing 10 to seal the first opening 11.

[0041] The motor assembly 100 in the present invention can be applied to a sweeping robot, which is also provided with a drum. The motor assembly 100 is assembled inside the drum to drive the drum to rotate and achieve cleaning. The housing 10 in the motor assembly 100 is also a cylindrical structure to adapt to the drum. The interior of the housing 10 is used to install the drive assembly 20. The drive assembly 20 includes a motor 21 and a reduction box 23, wherein the rotating shaft of the motor 21 is transmission-connected to the reduction mechanism (not marked) in the reduction box 23, and the output shaft (not marked) of the reduction box 23 is transmission-connected to the reduction mechanism (not marked). In this way, the reduction box 23 can convert the high-speed and low-torque power output by the rotating shaft into the low-speed and high-torque power output by the output shaft to drive the drum to rotate and achieve cleaning operations.

[0042] The motor assembly 100 in the technical solution of the present invention includes a housing 10, a drive assembly 20 and a sealing assembly 30. The drive assembly 20 is arranged in the accommodating cavity, and the sealing assembly 30 includes a first end cover 31, a first sealing member 33 and a clamping member 35. The first end cover 31 is fixed to the housing 10, and the clamping member 35 is movably connected to one end of the first end cover 31 facing the drive assembly 20, and the first sealing member 33 is clamped between the first end cover 31 and the clamping member 35. When assembling the motor assembly 100, the first seal 33 is first pre-fixed between the first end cover 31 and the clamp 35 to form a pre-assembled assembly, and then the entire pre-assembled assembly is mounted on the first opening 11 of the housing 10. When the first end cover 31 is locked and fixed with the housing 10, the clamp 35 can be moved so that the clamp 35 moves toward one end of the first end cover 31, thereby squeezing the first seal 33, so that the first seal 33 is squeezed outward and abuts against the inner wall of the housing 10 to seal the first opening 11. Since the first seal 33 does not have excessive contact, squeezing and friction with the housing 10 during assembly, it not only reduces the difficulty of assembly between the first end cover 31 and the housing 10, but also improves the assembly efficiency. At the same time, it also avoids damage to the first seal 33 during the assembly process, ensures the sealing effect of the first seal 33, and improves the sealing protection performance of the motor assembly 100. In addition, the pre-assembled assembly composed of the first end cover 31, the first seal 33 and the clamp 35 can also form a modular assembly of the motor assembly 100, further improving production efficiency. The sealing protection performance can be waterproof, dustproof, and prevent harmful gases from entering the accommodating cavity, so as to better protect the components in the accommodating cavity.

[0043] It can be understood that the material of the housing 10 is a metal material, such as stainless steel, aluminum, aluminum alloy, copper, copper alloy, iron, iron alloy, etc., to improve the strength of the housing 10 and extend the service life of the housing 10. In addition, the metal housing 10 also has good thermal conductivity, which can quickly dissipate the heat generated during the operation of the drive component 20, reduce the operating temperature of the drive component 20, avoid the drive component 20 from being burned, and ensure the service life of the motor component 100 and the sweeping robot.

[0044] In the sealing assembly 30, the material of the first end cap 31 is a hard material to ensure the strength of the structure of the first end cap 31. The material of the first end cap 31 can be a plastic material, such as ABS (Acrylonitrile Butadiene Styrene plastic, a terpolymer of three monomers of acrylonitrile, butadiene and styrene), POM (Polyoxymethylene), PS (Polystyrene), PMMA (polymethyl methacrylate), PC (Polycarbonate), PET (polyethylene glycol terephthalate), etc. The first end cap 31 is made of plastic material, which can reduce the weight and cost of the first end cap 31 on the one hand, and on the other hand, the first end cap 31 made of plastic material also has good rust resistance and weather resistance, which can effectively prevent the first end cap 31 from being corroded and damaged in various complex environments, thereby extending the service life of the first end cap 31.

[0045] The material of the clamping member 35 is also a hard material, so that the clamping member 35 can have good anti-deformation ability. When the clamping member 35 moves toward the first end cover 31, it is ensured that the clamping member 35 can clamp the first end cover 31 and effectively squeeze the first sealing member 33, so that the first sealing member 33 is deformed and abuts against the inner wall of the housing 10 to achieve a sealing effect. Specifically, the material of the clamping member 35 can be plastic, such as ABS, POM, PC, PET, etc. The clamping member 35 can also be a metal material, such as stainless steel material, aluminum material, aluminum alloy material, iron material, iron alloy material, etc. The materials of the clamping member 35 are not listed one by one here.

[0046] The first seal 33 may be an annular structure, and its cross section may be an O-ring, a V-ring, or a seal of other shapes. The first seal 33 may also be a sheet-like structure, as long as it can abut against and seal with the inner wall surface of the housing 10 in an extruded state, and the shape of the first seal 33 is not limited here. Further, the material of the first seal 33 is a soft material, for example, the material of the first seal 33 may be rubber, or silicone, etc. This type of material is easy to deform after extrusion, and can better fit the gap between the housing 10 and the first end cover 31, which can achieve a better sealing effect.

[0047] In one embodiment, the motor assembly 100 further includes a heat conducting member 70, which is disposed in the accommodating cavity and abuts against the inner wall surface of the housing 10 to conduct the heat of the accommodating cavity to the housing 10 and dissipate it to the outside through the housing 10, thereby achieving the purpose of improving the heat dissipation efficiency of the drive assembly 20 and reducing the operating temperature of the drive assembly 20.

[0048] There are many ways to realize that the clamping member 35 can move relative to the first end cover 31. In one embodiment, the clamping member 35 can be movably connected to the first end cover 31 by a pull rod. Specifically, the first end cover 31 is provided with a through hole, the pull rod passes through the through hole and is connected to the clamping member 35, and the pull rod also cooperates with the hole wall of the through hole to form a locking structure to lock and fix the clamping member 35 after moving, so as to maintain the first sealing member 33 in a compressed state.

[0049] In one embodiment, the clamping member 35 can also be moved relative to the first end cover 31 by screws. Figure 2 and Figure 3 In one embodiment of the present invention, a connecting hole 311 is provided on the end surface of the first end cover 31, and the clamping member 35 is provided with a first threaded hole 3511. A screw passes through the connecting hole 311 and cooperates with the first threaded hole 3511. The screw rotates relative to the first end cover 31 to enable the clamping member 35 to be moved relative to the first end cover 31.

[0050] In the technical solution of an embodiment of the present invention, the clamping member 35 is movably connected to the first end cover 31 by screws. During assembly, when the first end cover 31, the clamping member 35 and the first sealing member 33 form a pre-assembled assembly, the clamping member 35 is pre-fixed to the first end cover 31 by screws. At this time, the screws are in an unlocked state. After the first end cover 31 is locked and fixed to the housing 10, the screws are tightened again and the clamping member 35 is driven to move toward the first end cover 31 to a locked state. It can be understood that the clamping member 35 can be rotatably connected to the first end cover 31 by one or more screws to improve the stability of the connection between the clamping member 35 and the first end cover 31.

[0051] Further, in the technical solution of an embodiment of the present invention, the first end cover 31 is also fixed to the housing 10 by screws. Specifically, a second threaded hole (not marked) is provided on the side surface of the first end cover 31, and a mounting hole (not marked) corresponding to the second threaded hole is provided on the surface of the housing 10. The first end cover 31 is fixed to the housing 10 by the cooperation of the screws with the mounting hole and the second threaded hole.

[0052] Reference Figure 5 In one embodiment of the present invention, the clamping member 35 includes a connected cylinder 351 and a clamping plate 353, the cylinder 351 is provided with the first threaded hole 3511, the clamping plate 353 is connected to the end of the cylinder 351 away from the first end cover 31, the clamping plate 353 is protruding from the side wall surface of the cylinder 351, the first sealing member 33 is sleeved on the side wall surface of the cylinder 351, and respectively abuts against the end surface of the first end cover 31 and the surface of the clamping plate 353.

[0053] In the technical solution of one embodiment of the present invention, the clamping member 35 includes a cylinder 351 and a clamping plate 353. The purpose of such a setting is to facilitate the cylinder 351 to fix the first seal 33, reduce the alignment time of the first seal 33 during assembly, and improve the assembly efficiency of the first seal 33. The pressure plate is arranged to protrude from the side wall surface of the cylinder 351 to ensure that the clamping member 35 can apply pressure to the first seal 33 to achieve the extrusion of the first seal 33 during the movement of the clamping member 35 toward the first end cover 31. In order to further improve the efficiency of assembling the first seal 33 and the clamping member 35, the cylinder 351 is also set to a conical structure. That is, the outer diameter of the end of the cylinder 351 close to the first end cover 31 is small, and the outer diameter of the end of the cylinder 351 away from the first end cover 31 gradually increases. In this way, the first seal 33 can be sleeved on the surface of the cylinder 351 from the end of the cylinder 351 with a small outer diameter, thereby improving the efficiency of assembling the first seal 33 and the cylinder 351.

[0054] Further, refer to Figure 4 In one embodiment of the present invention, a recessed groove 313 is formed on the surface of the first end cover 31 facing the clamping member 35 . When the clamping member 35 moves toward the first end cover 31 , part of the structure of the cylinder 351 can be inserted into the recessed groove 313 .

[0055] In the technical solution of an embodiment of the present invention, the end surface of the first end cover 31 is provided with a recessed groove 313, and the recessed groove 313 is adapted to the cylinder 351. The provision of the recessed groove 313 can reduce the space occupied by the clamping member 35 and reduce the axial volume of the sealing assembly 30.

[0056] Reference Figure 6 In one embodiment of the present invention, the first sealing member 33 comprises:

[0057] A main body 331, which is annularly arranged and sleeved on the side wall of the cylinder 351, with two ends of the main body 331 respectively abutting against the end surface of the first end cover 31 and the surface of the clamping plate 353; and

[0058] The sealing portion 333 is protruding from the side wall surface of the main body portion 331 .

[0059] In the technical solution of one embodiment of the present invention, the main body 331 is roughly annularly arranged, and the sealing part 333 is arranged around the side wall surface of the main body 331 in a whole circle. The setting of the sealing part 333 can increase the contact area between the first sealing member 33 and the inner wall surface of the housing 10, and further improve the sealing protection performance of the first sealing member 33. Further, the first sealing member 33 also includes an extrusion part 335, which is connected to one end of the main body 331 close to the clamping plate 353, and the extrusion part 335 abuts against the surface of the clamping plate 353 and protrudes from the surface of the main body 331. When the extrusion part 335 is squeezed, it can be folded toward the outside and abut against the inner wall surface of the housing 10, further improving the sealing reliability of the first sealing member 33. It can be understood that the main body 331, the sealing part 333 and the extrusion part 335 are an integrated structure.

[0060] Reference Figure 2 In one embodiment of the present invention, the cylinder 351 is open at both ends, and the motor assembly 100 further includes a second sealing member 40, which is inserted into the cylinder 351 to seal the opening of the cylinder 351, and the second sealing member 40 is further provided with a wire hole (not shown);

[0061] The first end cover 31 is further provided with a wiring hole 315 , and the wiring hole 315 communicates with the accommodating cavity and the wiring hole.

[0062] In the technical solution of one embodiment of the present invention, the cylinder 351 is set to a structure with two ends open to facilitate the routing of the power line and signal line of the motor. In order to further improve the sealing performance of the motor assembly 100, a second seal 40 is also provided in the cylinder 351. The second seal 40 is used to seal the cylinder 351. Therefore, the second seal 40 is provided with a routing hole 315 for the power line and signal line to pass through. The power line and signal line of the motor pass through the routing hole 315 and the wire hole and extend outward. It can be understood that the material of the second seal 40 is the same as that of the first seal 33.

[0063] Reference Figure 2 In one embodiment of the present invention, the housing 10 is further provided with a second opening 13 communicating with the accommodating cavity, and the second opening 13 is arranged opposite to the first opening 11;

[0064] The motor assembly 100 also includes a second end cover 50 and a third seal 60. The second end cover 50 is connected to an end of the housing 10 away from the first opening 11. The second end cover 50 is also connected to the drive assembly 20. The third seal 60 is clamped between the second end cover 50 and the drive assembly 20 and abuts against the inner wall surface of the housing 10 to seal the second opening 13.

[0065] In the technical solution of one embodiment of the present invention, the housing 10 is further provided with a second opening 13, and the second opening 13 is arranged opposite to the first opening 11, so that the housing 10 is roughly cylindrical in structure. The arrangement of the second opening 13 facilitates the assembly of the drive assembly 20, and also facilitates the output shaft to pass through the accommodating cavity and be connected to the transmission of the drum to achieve the cleaning function. Similarly, in order to improve the sealing and protection performance of the motor assembly 100, a second end cover 50 and a third seal 60 are also provided to seal the end of the second opening 13. Since the third seal 60 is sandwiched between the drive assembly 20 and the second end cover 50, the sealing method of the third seal 60 is also the same as the sealing method of the first seal 33. That is, the second end cover 50 and the reduction box 23 in the drive assembly 20 are also connected by screws. After the second end cover 50 and the reduction box 23 are locked by screws, the third seal 60 is axially squeezed to achieve the sealing of the third seal 60 and the housing 10.

[0066] The present invention also proposes a sweeping robot, which includes a roller and a motor assembly 100. The specific structure of the motor assembly 100 refers to the above-mentioned embodiment. Since the sweeping robot adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A motor assembly, characterized in that: include: A housing, wherein a receiving cavity is formed inside the housing, and the housing is further provided with a first opening communicating with the receiving cavity; A driving assembly, wherein the driving assembly is disposed in the accommodating cavity; as well as A sealing assembly, the sealing assembly comprising a first end cover, a first sealing member and a clamping member, wherein the first end cover is fixed to one end of the housing, the clamping member is movably connected to one end of the first end cover facing the driving assembly, and the first sealing member is clamped between the first end cover and the clamping member; The end surface of the first end cover is provided with a connecting hole, and the clamping member includes a connected cylinder and a clamping plate, the outer diameter of the cylinder gradually increases from one end of the first end cover toward one end of the clamping plate, the cylinder is provided with a first threaded hole, the clamping plate is connected to the end of the cylinder away from the first end cover, and the clamping plate is protruded from the side wall surface of the cylinder, the first sealing member includes a main body and a sealing portion, the main body is annularly arranged, the main body is sleeved on the side wall surface of the cylinder, the two ends of the main body are respectively abutted against the end surface of the first end cover and the surface of the clamping plate, and the sealing portion is protruded from the side wall surface of the main body; a screw passes through the connecting hole and cooperates with the first threaded hole, and the screw rotates relative to the first end cover to make the clamping member move relative to the first end cover; A recessed groove is formed on the surface of the first end cover facing the clamping member, and when the clamping member moves toward the first end cover, a part of the structure of the cylinder body can be inserted into the recessed groove; During assembly, the first sealing member is pre-fixed between the first end cover and the clamping member to form a pre-assembled component, and the first sealing member does not contact the inner wall surface of the shell during the pre-assembly process. When the pre-assembled component is fitted on the first opening of the shell, the first end cover is locked and fixed to the shell, and then the clamping member can be moved to move toward the first end cover and squeeze the first sealing member, so that the main body and the sealing portion of the first sealing member are expanded outward by the squeezing force and abut against the inner wall surface of the shell to seal the first opening.

2. The motor assembly according to claim 1, characterized in that The first sealing member further comprises an extrusion portion, which is connected to one end of the main body close to the clamping plate, and the extrusion portion abuts against a surface of the clamping plate and protrudes from the surface of the main body.

3. The motor assembly according to claim 2, characterized in that The cylinder has a structure with two ends open, and the motor assembly further includes a second sealing member, the second sealing member seals the opening of the cylinder, and the second sealing member is also provided with a wire hole; The first end cover is also provided with a wiring hole, and the wiring hole communicates with the accommodating cavity and the wiring hole.

4. The motor assembly according to any one of claims 1 to 3, characterized in that: The housing is further provided with a second opening communicating with the accommodating cavity, and the second opening is arranged opposite to the first opening; The motor assembly also includes a second end cover and a third seal. The second end cover is connected to an end of the shell away from the first opening. The second end cover is also connected to the drive assembly. The third seal is clamped between the second end cover and the drive assembly and abuts against the inner wall surface of the shell to seal the second opening.

5. A sweeping robot, characterized in that: The cleaning robot comprises the motor assembly as claimed in any one of claims 1 to 4.

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