Shell assembly for waterproof motor, waterproof motor assembly and cleaning equipment

Abstract

The utility model provides a shell assembly for a waterproof motor, a waterproof motor assembly and cleaning equipment. The shell assembly of the waterproof motor comprises a waterproof base which is provided with a sealing ring extending along the axial direction; the open end of the waterproof shell faces the waterproof base, the inner circumferential face and / or the outer circumferential face of the open end of the waterproof shell are / is attached to the sealing ring, and a sealing cavity used for containing the waterproof motor is formed between the waterproof base and the waterproof shell; the sealing ring is arranged between the inner peripheral surface and / or the outer peripheral surface of the waterproof shell and the sealing ring, and the inner peripheral surface and / or the outer peripheral surface of the opening end of the waterproof shell and / or the sealing ring are / is provided with a mounting groove for accommodating the sealing ring; wherein the diameter D0 of the uncompressed section of the sealing ring and the depth H of the mounting groove meet the condition that H / D0 is larger than 0.7 and smaller than 0.8. The waterproof motor solves the problem of poor waterproof effect of the waterproof motor in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of motor equipment technology, and more specifically, to a housing assembly for a waterproof motor, a waterproof motor assembly, and a cleaning device. Background Technology

[0002] Electric motors are commonly used power components, typically consisting of a body and a housing. The housing seals the body, protecting it from external dust, moisture, oil, and other corrosive substances. The safety of electric motors during operation, especially their waterproofing, is receiving increasing attention, particularly for motors on underwater equipment. Underwater environments are humid, and inadequate sealing can allow water to enter the waterproof motor, causing moisture damage, short circuits, and ultimately, damage to the entire device. A common waterproofing method involves connecting and securing the housing to the body, then sealing the space between them with adhesive. However, this adhesive, after cooling, is susceptible to cracking or partial detachment due to prolonged water erosion, leading to potential leaks over extended use. Therefore, providing a waterproof motor with a superior seal is a pressing issue in this field. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a housing assembly, a waterproof motor assembly, and a cleaning device with good sealing effect for waterproof motors.

[0004] To achieve the above objectives, the technical solution provided by an embodiment of this utility model is as follows:

[0005] A housing assembly for a waterproof motor, comprising: a waterproof base having a sealing ring extending axially; a waterproof housing, the open end of the waterproof housing facing the waterproof base, and the inner peripheral surface and / or outer peripheral surface of the open end of the waterproof housing being fitted with the sealing ring, a sealing cavity for accommodating the waterproof motor being formed between the waterproof base and the waterproof housing; a sealing ring, the sealing ring being provided between the inner peripheral surface and / or outer peripheral surface of the waterproof housing and the sealing ring, and an installation groove for accommodating the sealing ring being provided on the inner peripheral surface and / or outer peripheral surface and / or the sealing ring of the open end of the waterproof housing; wherein, the ratio of the uncompressed cross-sectional diameter D0 of the sealing ring to the depth H of the installation groove satisfies: 0.7 < H / D0 < 0.8. Since the waterproof housing and the waterproof base need to be assembled and used together, only improving their structures cannot ensure effective sealing. Therefore, by providing a sealing ring between them, the sealing performance of the housing assembly after assembly can be effectively improved. Moreover, the sealing ring is arranged radially between the waterproof base and the waterproof housing, forming a radial seal, effectively isolating the external environment from the internal space of the housing assembly. At the same time, the direction of the extrusion force exerted by the waterproof housing and the waterproof base on the sealing ring is different from the assembly direction of the waterproof housing and the waterproof base, which can effectively avoid the problem of the sealing ring failing due to long-term force extrusion, thus ensuring the service life of the sealing ring and effectively avoiding the liquid leakage problem caused by the failure of the sealing ring. Not only that, compared with the glue injection sealing method, it is also convenient to repair and replace the components inside the housing assembly, thereby improving the convenience and versatility of use.

[0006] The ratio of the depth H of the installation groove to the uncompressed cross-sectional diameter D0 of the sealing ring is between 0.7 and 0.8, making the depth of the installation groove approximately 70% to 80% of the diameter of the sealing ring. Thus, when installed, the sealing ring is compressed by about 20% to 30%. A suitable compression amount can ensure sufficient sealing force while avoiding damaging the elasticity of the sealing ring due to excessive compression, thereby extending the service life of the sealing ring.

[0007] If the ratio of the depth H of the installation groove to the uncompressed cross-sectional diameter D0 of the sealing ring is less than 0.7, it means that the installation groove is relatively shallow, and the pre-compression amount relative to the original size of the sealing ring will exceed the ideal range. An excessive compression amount will cause the sealing ring to bear too high compressive stress, resulting in excessive deformation of the material. Under the long-term overpressure state, the internal stress concentration of the sealing ring accelerates the aging and fatigue of elastomeric materials such as rubber, thus shortening the service life of the sealing ring. At the same time, the long-term overpressure may cause the material of the sealing ring to harden or break,进而影响密封性能,甚至引起泄漏问题。

[0008] If the ratio of the depth H of the installation groove to the uncompressed cross-sectional diameter D0 of the sealing ring is greater than 0.8, the groove depth is relatively large, which means that the pre-compression amount of the sealing ring during installation is insufficient. Too low pre-compression amount will result in insufficient pressure between the sealing ring and the contact surface, reducing the sealing effect and increasing the risk of leakage. Due to insufficient pre-compression, the sealing ring is more likely to move or deform during operation due to vibration or temperature changes, thus affecting the durability and reliability of the seal.

[0009] Furthermore, the radial installation clearance D1 between the waterproof housing and the sealing ring and the depth H of the installation groove satisfy: 0 < H / D1 < 0.09. A good waterproof sealing effect can be obtained at this ratio.

[0010] Furthermore, the sealing ring meets the following requirements: C = C r ×(D3 - D2); where C is the compression amount of the sealing ring, C r is the compression rate of the sealing ring, C r value is 10% - 30%, D3 is the inner diameter of the waterproof housing, D2 is the outer diameter of the sealing ring, and the uncompressed cross-sectional diameter D0 of the sealing ring can be obtained by the following method:

[0011] According to the inner diameter of the waterproof housing and the outer diameter of the sealing ring, select the thickness diameter of the sealing ring and the appropriate compression amount to ensure that the sealing ring arranged between the waterproof housing and the sealing ring can seal effectively and will not cause sealing failure due to excessive extrusion.

[0012] Furthermore, the outer peripheral surface of the waterproof base has a circumferential flange extending radially. The sealing ring is located inside the circumferential flange, and the outer peripheral surface of the sealing ring is provided with a sealing ring. The end surface of the open end of the waterproof housing abuts against the circumferential flange; or the sealing ring is flush with the outer peripheral surface of the waterproof base, and the inner peripheral surface of the sealing ring is provided with a sealing ring; or there are two sealing rings, and the diameters of the two sealing rings are different, so as to form a sealing groove between the two sealing rings, and the open end of the waterproof housing is inserted into the sealing groove. By setting the position and number of the sealing rings differently, the three schemes of the sealing ring abutting against the inner peripheral surface of the waterproof housing, the sealing ring abutting against the outer peripheral surface of the waterproof housing, and there are two sealing rings, respectively abutting against the inner peripheral surface and the outer peripheral surface of the waterproof housing, can all achieve the waterproof effect.

[0013] Furthermore, there are multiple sealing rings, and the multiple sealing rings are arranged at intervals along the axial direction of the sealing ring. By arranging multiple sealing rings at intervals along the axial direction of the sealing ring, the waterproof effect is improved, and the installation groove provided on the waterproof housing and the sealing ring can facilitate the installation and fixation of the sealing ring.

[0014] Furthermore, the sealing ring includes: a body; and a covering layer, wherein the outer side of the body is covered with a covering layer, which is a thin film or a composite material layer. By providing a covering layer composed of a thin film or a composite material layer, the wear resistance and waterproof performance of the sealing ring can be improved, thereby increasing the service life of the sealing ring.

[0015] Furthermore, the body is made of rubber; and / or the film is made of polytetrafluoroethylene (PTFE). The rubber body provides elasticity, and PTFE enhances the corrosion resistance of the sealing ring.

[0016] Furthermore, the composite material layer consists of a multi-layer structure, including a self-lubricating layer, an adhesive layer, and a reinforcing layer. The self-lubricating layer is bonded to the main body, the reinforcing layer is located on the outside of the self-lubricating layer, and the adhesive layer bonds and fixes the self-lubricating layer and the reinforcing layer together. By setting a multi-layer composite material layer, the chemical and physical properties of the coating layer can be enhanced.

[0017] Furthermore, the reinforcing layer is one or more layers of woven fiber; and / or the self-lubricating layer is made of polytetrafluoroethylene (PTFE). The woven fiber layer enhances the reinforcement's ductility and maintains its wear and corrosion resistance by preventing deformation of the sealing ring due to thermal expansion and contraction. The self-lubricating layer improves the corrosion resistance of the covering layer.

[0018] Furthermore, the sealing ring includes a body, which comprises: a ring-shaped skeleton core; and a rubber layer covering the outside of the skeleton core, wherein the hardness of the skeleton core is greater than that of the rubber layer. The ring-shaped skeleton core can accommodate the diameter of the entire waterproof outer shell, and the rubber layer covering the skeleton core improves the toughness of the body, thus ensuring that when the body is fitted onto the waterproof outer shell or sealing ring, it maintains a complete ring shape while also possessing a certain degree of deformation resistance.

[0019] Furthermore, the skeleton core is made of metal; and / or protrusions or grooves are provided on the outer surface of the skeleton core to increase the limiting effect between the rubber layer and the skeleton core. Using a skeleton core made of metal can improve the structural stability of the skeleton core, and the limiting method using protrusions or grooves is simple in principle and easy to implement.

[0020] Furthermore, the housing assembly also includes a sealing gasket having opposing first and second sealing surfaces, the first and / or second sealing surfaces being planar and respectively abutting against the end face of the open end of the waterproof housing and the surface of the waterproof base. By providing a sealing gasket, and with the first and second sealing surfaces respectively abutting against the end face of the open end of the waterproof housing and the surface of the waterproof base, the waterproof performance of the housing assembly can be further improved.

[0021] Furthermore, one of the first and second sealing surfaces is non-planar, and multiple annular protrusions are provided on the non-planar first or second sealing surface. These annular protrusions have different diameters and are concentrically arranged, forming a Fresnel-like structure on the first or second sealing surface. The end face of the opening of the waterproof housing or the surface of the waterproof base has sealing grooves that engage with the multiple annular protrusions. By making one of the first and second sealing surfaces non-planar, the friction between the gasket and the waterproof housing or waterproof base is increased, preventing the gasket from loosening after the housing assembly is installed. The multiple annular protrusions forming a Fresnel-like structure simplify processing.

[0022] This utility model also provides a waterproof motor assembly, including: a motor body having a motor shaft; and the aforementioned housing assembly, wherein at least a portion of the motor body is disposed within the housing assembly, and the waterproof outer shell of the housing assembly has an opening for avoiding the motor shaft, the motor shaft extending from the opening to the outside of the housing assembly, and the opening having a sealing oil cavity. By placing the motor body within the housing assembly, with the motor shaft portion extending out of the housing assembly, and providing a sealing oil cavity at the opening of the waterproof outer shell, the immiscibility of oil and water can achieve a good sealing effect.

[0023] Furthermore, the surface of the opening of the waterproof casing bulges outward to form a raised portion, which creates a sealing oil cavity. The raised portion allows for the storage of more oil within the sealing oil cavity, thereby improving the oil sealing effect.

[0024] Furthermore, the waterproof base has a connecting part. The cleaning equipment is connected via this connecting part, thereby securing the entire housing assembly.

[0025] This utility model also provides a cleaning device, including the above-mentioned waterproof motor assembly.

[0026] This invention offers the following advantages: Since the waterproof outer shell and waterproof base need to be assembled together, structural improvements alone cannot guarantee an effective seal. Therefore, by placing a sealing ring between them, the sealing performance of the assembled shell assembly can be effectively improved. Furthermore, the sealing ring is positioned radially on both the waterproof base and the waterproof outer shell, forming a radial seal that effectively isolates the external environment from the internal space of the shell assembly. Simultaneously, the direction of the compressive force applied to the sealing ring by the waterproof outer shell and waterproof base differs from their assembly direction, effectively preventing the sealing ring from failing due to long-term compression, thus ensuring its service life and preventing leakage caused by seal ring failure. Moreover, compared to potting sealant, this method facilitates the inspection and replacement of components within the shell assembly, thereby improving ease of use and versatility. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of a waterproof motor assembly provided in a specific embodiment of this utility model;

[0029] Figure 2 An exploded view of a waterproof motor assembly provided in a specific embodiment of the present invention;

[0030] Figure 3 A cross-sectional view of a waterproof motor assembly provided in a specific embodiment of this utility model;

[0031] Figure 4 A cross-sectional view of a waterproof motor assembly provided in another specific embodiment of this utility model;

[0032] Figure 5 A cross-sectional view of a waterproof motor assembly provided in another specific embodiment of this utility model;

[0033] Figure 6 A cross-sectional view of a waterproof motor assembly provided in another specific embodiment of this utility model.

[0034] The above figures include the following reference numerals:

[0035] 10. Waterproof base; 11. Sealing ring; 111. Inner ring; 112. Outer ring; 20. Waterproof outer shell; 21. Raised part; 30. Sealing ring; 40. Sealing gasket; 41. First sealing surface; 42. Second sealing surface; 50. Motor body; 51. Motor shaft; 60. Sealing oil cavity; 70. Connecting part; 80. Connecting wire. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In the description of the embodiments of this utility model, it should also be noted that the terms "first" and "second" used herein do not specifically refer to any order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0042] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] The technical solution of this utility model will now be described with reference to the accompanying drawings.

[0044] To address the problem of poor waterproofing performance in existing waterproof motors, this invention provides a housing assembly, a waterproof motor assembly, and a cleaning device for waterproof motors.

[0045] The cleaning equipment, waterproof motor assembly, and housing assembly will be described in detail below.

[0046] like Figures 1 to 6 As shown, the cleaning equipment includes a waterproof motor assembly and a housing, with the waterproof motor assembly housed inside the housing. The waterproof motor assembly includes a motor body 50, a housing assembly, and a connecting cable 80. Part of the motor body 50 is located within the housing assembly, thus protecting the motor body 50 from short-circuit damage when exposed to water during underwater cleaning. Part of the connecting cable 80 is located inside the housing assembly and connects to the motor body 50, while the other part is located outside the housing assembly and connects to the power source.

[0047] like Figures 1 to 6 As shown, the housing assembly for a waterproof motor includes a waterproof base 10, a waterproof outer shell 20, and a sealing ring 30. The waterproof base 10 has a sealing ring 11 extending axially. The open end of the waterproof outer shell 20 faces the waterproof base 10, and the inner and / or outer circumferential surfaces of the open end of the waterproof outer shell 20 are fitted against the sealing ring 11, forming a sealed cavity for accommodating the waterproof motor between the waterproof base 10 and the waterproof outer shell 20. The sealing ring 30 is disposed between the inner and / or outer circumferential surfaces of the waterproof outer shell and the sealing ring 11, and the inner and / or outer circumferential surfaces of the open end of the waterproof outer shell 20 and / or the sealing ring 11 are provided with mounting grooves for accommodating the sealing ring 30.

[0048] To ensure that the sealing ring 30 effectively provides a radial seal between the waterproof housing 20 and the sealing ring 11, the wire diameter of the sealing ring 30 and the depth H of the mounting groove need to be appropriately set. The sealing ring 30 should not be too large or too small; it should be selected and adjusted according to the depth H of the mounting groove. An excessively large sealing ring 30 may cause installation difficulties, while an excessively small sealing ring 30 may cause sealing failure. Therefore, the uncompressed cross-sectional diameter D0 of the sealing ring 30 and the depth H of the mounting groove must satisfy: 0.7 <H / D0<0.8。

[0049] Specifically, the ratio of the depth H of the mounting groove to the uncompressed cross-sectional diameter D0 of the sealing ring 30 is between 0.7 and 0.8, so that the depth of the mounting groove is approximately 70% to 80% of the diameter of the sealing ring 30. As a result, the sealing ring 30 is compressed by about 20% to 30% during installation. The appropriate amount of compression can ensure sufficient sealing force while avoiding damage to the elasticity of the sealing ring 30 due to excessive compression, thereby extending the service life of the sealing ring 30.

[0050] When the ratio of the depth H of the mounting groove to the uncompressed cross-sectional diameter D0 of the sealing ring 30 is less than 0.7, it is not convenient to install and use the sealing ring 30. When the ratio of the depth H of the mounting groove to the uncompressed cross-sectional diameter D0 of the sealing ring 30 is greater than 0.8, it is easy for the seal to be incomplete, thereby reducing the sealing effect and posing a safety hazard.

[0051] Specifically, if the ratio of the depth H of the mounting groove to the uncompressed cross-sectional diameter D0 of the sealing ring 30 is less than 0.7, it means that the mounting groove is shallow. The pre-compression amount relative to the original size of the sealing ring 30 will exceed the ideal range. Excessive compression will cause the sealing ring 30 to bear excessive compressive stress, resulting in excessive deformation of the material. Under long-term overpressure, the internal stress concentration of the sealing ring 30 will accelerate the aging and fatigue of rubber and other elastomer materials, thereby shortening the service life of the sealing ring 30. At the same time, long-term overpressure may cause the sealing ring 30 material to harden or crack, thereby affecting the sealing performance and even causing leakage problems.

[0052] If the ratio of the depth H of the installation groove to the uncompressed cross-sectional diameter D0 of the sealing ring 30 is greater than 0.8, the groove depth is relatively large, which means that the preload of the sealing ring 30 during installation is insufficient. Insufficient preload will result in insufficient pressure between the sealing ring 30 and the contact surface, reducing the sealing effect and increasing the risk of leakage. Due to insufficient preload, the sealing ring 30 is more likely to move or deform during operation due to vibration or temperature changes, thereby affecting the durability and reliability of the seal.

[0053] In this embodiment, the radial installation gap D1 between the waterproof housing 20 and the sealing ring 11 and the depth H of the installation groove satisfy the condition: 0 < H / D1 < 0.09. Besides the aforementioned need to reasonably select the depth H of the installation groove, the size of the installation gap D1 also needs to be considered. Only a reasonable installation gap D1 can ensure that the sealing ring 30 effectively seals. This ratio achieves a better waterproof sealing effect.

[0054] In this embodiment, the sealing ring 30 meets the following requirement: C = C r ×(D3-D2); where C is the compression of sealing ring 30, C r For the compression ratio of sealing ring 30, C r The value is 10%-30%, D3 is the inner diameter of the waterproof outer shell 20, D2 is the outer diameter of the sealing ring 11, and the uncompressed cross-sectional diameter D0 of the sealing ring 30 can be obtained in the following way:

[0055] The diameter of the sealing ring 30 and the appropriate compression amount C are selected based on the inner diameter D3 of the waterproof housing 20 and the outer diameter D2 of the sealing ring 11 to ensure that the sealing ring 30 set between the waterproof housing 20 and the sealing ring 11 can effectively seal without causing the seal to fail due to excessive compression.

[0056] In this embodiment, the waterproof housing 20 and the waterproof base 10 need to be assembled together. Therefore, structural improvements alone cannot guarantee an effective seal. By placing a sealing ring 30 between them, the sealing performance of the assembled housing assembly can be effectively improved. Furthermore, the sealing ring 30 is positioned radially on the waterproof base 10 and the waterproof housing 20, forming a radial seal that effectively isolates the external environment from the internal space of the housing assembly. Simultaneously, the direction of the compressive force applied to the sealing ring 30 by the waterproof housing 20 and the waterproof base 10 is different from their assembly direction. This effectively prevents the sealing ring 30 from failing due to long-term compression, thus ensuring its service life and preventing leakage caused by its failure. Moreover, compared to potting sealant, this method facilitates the inspection and replacement of components within the housing assembly, thereby improving ease of use and versatility. The waterproof housing 20 and the waterproof base 10 are connected primarily by a sealing ring 11. The sealing ring 11 engages with the waterproof housing 20, and a sealing ring 30 is placed between the sealing ring 11 and the waterproof housing 20 to achieve waterproofing of the housing assembly. However, the sealing ring 11 can be positioned differently, such as in terms of location or number. By varying the location and number of sealing rings 11, waterproofing can be achieved through three methods: the sealing ring 11 abuts against the inner circumferential surface of the waterproof housing 20; the sealing ring abuts against the outer circumferential surface of the waterproof housing 20; or two sealing rings abut against the inner and outer circumferential surfaces of the waterproof housing 20, respectively. All three methods achieve waterproofing. The three methods are explained in detail below.

[0057] In this embodiment, as Figure 3 As shown, the outer peripheral surface of the waterproof base 10 has a radially extending circumferential flange, the sealing ring 11 is located inside the circumferential flange, and the outer peripheral surface of the sealing ring 11 is provided with a sealing ring 30. The end face of the open end of the waterproof housing 20 abuts against the circumferential flange.

[0058] Specifically, the outer peripheral surface of the waterproof base 10 has a radially extending circumferential flange. The sealing ring 11 is spaced apart from the outer edge of the circumferential flange. When the waterproof housing 20 is fitted with the waterproof base 10, the sealing ring 11 abuts against the inner peripheral surface of the waterproof housing 20. In other words, the diameter of the sealing ring 11 matches the inner diameter of the waterproof housing 20. After the waterproof housing 20 is installed in place, the sealing ring 30 is compressed by radial pressure, thereby preventing water from entering the sealing ring 11 and the inner peripheral surface of the waterproof housing 20 from the opening end of the waterproof housing 20 and the abutment point of the waterproof base 10, and then entering the waterproof housing 20 and contacting the motor body 50.

[0059] In another embodiment of this utility model, such as Figure 4As shown, the sealing ring 11 is flush with the outer circumferential surface of the waterproof base 10, and a sealing ring 30 is provided on the inner circumferential surface of the sealing ring 11.

[0060] Specifically, the outer circumferential surface of the sealing ring 11 is flush with the outer circumferential surface of the waterproof base 10, that is, the sealing ring 11 is set on the upper surface of the waterproof base 10 and the outer circumferential surface of the sealing ring 11 is coplanar with the outer circumferential surface of the waterproof base 10. The inner diameter of the sealing ring 11 is adapted to the outer diameter of the waterproof shell 20. The sealing ring 30 is simultaneously compressed by the inner circumferential surface of the sealing ring 11 and the outer circumferential surface of the waterproof shell 20.

[0061] In another embodiment of this utility model, such as Figure 5 As shown, there are two sealing rings 11, and the diameters of the two sealing rings 11 are different, so that a sealing groove is formed between the two sealing rings 11, and the open end of the waterproof shell 20 is inserted into the sealing groove.

[0062] Specifically, the sealing ring 11 includes an inner ring 111 and an outer ring 112. The diameter of the inner ring 111 is smaller than the diameter of the outer ring 112. The outer circumferential surface of the inner ring 111 and the inner circumferential surface of the outer ring 112 are spaced apart to form a sealing groove. A sealing ring 30 is provided between the inner circumferential surface of the waterproof shell 20 and the outer circumferential surface of the inner ring 111, and between the outer circumferential surface of the waterproof shell 20 and the inner circumferential surface of the outer ring 112. The two sealing rings 30 are used to seal the gaps between the inner ring 111 and the waterproof shell 20 and between the outer ring 112 and the waterproof shell 20, respectively, thereby ensuring waterproof performance.

[0063] In this embodiment, in order to improve the sealing effect and avoid damage to a single sealing ring 30 after long-term use, resulting in a decrease in the sealing effect, there are multiple sealing rings 30, which are spaced apart along the axial direction of the sealing ring 11.

[0064] Specifically, multiple sealing rings 30 are spaced apart, with gaps between adjacent sealing rings 30. This provides deformation space for the sealing rings 30 when they deform under the pressure of the sealing ring 11 and the waterproof outer shell 20. Simultaneously, air exists between adjacent sealing rings 30, which assists in sealing.

[0065] In this embodiment, to facilitate the installation and positioning of the sealing ring 30, an installation groove for accommodating the sealing ring 30 is provided on the inner and / or outer circumferential surfaces and / or sealing ring 11 of the open end of the waterproof housing 20. Providing installation grooves on the waterproof housing 20 and the sealing ring 30 facilitates the installation and fixation of the sealing ring 30.

[0066] Specifically, the mounting groove can be provided in various ways. For example, a mounting groove can be provided on the sealing ring 11, with the sealing ring 30 partially housed within the groove and the portion extending out of the groove abutting against the waterproof outer shell 20; or a mounting groove can be provided on the waterproof outer shell 20, with the sealing ring 30 partially housed within the groove and the portion extending out of the groove abutting against the sealing ring 11; or a mounting groove can be provided on both the waterproof outer shell 20 and the sealing ring 11, with the two mounting grooves corresponding to each other, and the distance between the bottoms of the two mounting grooves being less than the width of the sealing ring 30, so that the sealing ring 30 can be deformed by compression.

[0067] In this embodiment, the sealing ring 30 is a composite structure rather than a directly molded structure. The sealing ring 30 includes a body and a covering layer. The outer side of the body is covered with the covering layer, which is a thin film. By providing the covering layer, the wear resistance and waterproof performance of the sealing ring 30 can be improved, thereby increasing the service life of the sealing ring 30.

[0068] Specifically, during production, the sealing ring 30 is first manufactured as a body, and then the covering layer is applied to the body. The covering layer and the body can be joined by heat pressing or bonding. Bonding provides high connection strength and good sealing performance between the body and the covering layer, and can accommodate bodies and covering layers of different shapes and sizes. Heat pressing provides excellent sealing, and the connection between the body and the covering layer remains reliable even after the motor body 50 has been used for a long time and generated heat.

[0069] In one embodiment of the present invention (not shown), the sealing ring 30 is integrally molded from rubber or other deformable materials.

[0070] In this embodiment, the covering layer is composed of a thin film disposed on the outside of the main body. The main body is made of rubber. The thin film is made of polytetrafluoroethylene (PTFE). The main body made of rubber material has a certain degree of elasticity, and PTFE can improve the corrosion resistance of the sealing ring. The thin film layer used for the covering layer has a lower production cost, and the composite material layer can improve the performance of the sealing ring 30.

[0071] Specifically, during the process of the waterproof outer shell 20 and the sealing ring 11 engaging, the sealing ring 30 will be rubbed and squeezed. The film is made of polytetrachloroethylene material, which is low in cost and can ensure wear-resistant and corrosion-resistant performance.

[0072] In another embodiment of this invention (not shown), the coating layer is composed of a composite material layer. The composite material layer has a multi-layer structure, including a self-lubricating layer, an adhesive layer, and a reinforcing layer. The self-lubricating layer is bonded to the main body, the reinforcing layer is disposed outside the self-lubricating layer, and the adhesive layer bonds and fixes the self-lubricating layer to the reinforcing layer. By providing a multi-layer composite material structure, the chemical and physical properties of the coating layer can be enhanced.

[0073] Specifically, the multi-layered composite material structure enhances the thickness and performance of the coating layer, thereby ensuring its structural strength. The self-lubricating layer reduces friction between the sealing ring 30 and the body during sealing, improving its sealing performance and service life. The reinforcing layer further enhances the structural strength of the sealing ring 30. The adhesive layer ensures a stable bond between the self-lubricating layer and the reinforcing layer. When operating underwater, the sealing ring 30 of the motor assembly not only provides superior sealing performance but also effectively reduces friction and wear, extending the motor's service life.

[0074] In this embodiment, the structure and materials of the composite material layers are different. The reinforcing layer is one or more layers of woven fiber. The self-lubricating layer is made of polytetrafluoroethylene (PTFE). The woven fiber layer as the reinforcing layer improves the ductility of the reinforcement and maintains the wear resistance and corrosion resistance of the reinforcing layer by preventing the sealing ring from deforming under the influence of thermal expansion and contraction. The self-lubricating layer improves the corrosion resistance of the coating layer.

[0075] Specifically, the mechanical strength and pressure resistance of the sealing ring 30 are improved by the fiber braided layer, so that it can maintain a good sealing state in a high-pressure underwater environment; the polytetrafluoroethylene self-lubricating layer improves the wear resistance and self-lubricating performance of the sealing ring 30, reducing its friction and wear during the sealing process.

[0076] In this embodiment, the body is not made of a single material; it includes a core skeleton and a rubber layer. The core skeleton is ring-shaped. The rubber layer covers the outside of the core skeleton, and the hardness of the core skeleton is greater than that of the rubber layer. The ring-shaped core skeleton can adapt to the diameter of the entire waterproof shell, and the rubber layer covering the core skeleton can improve the toughness of the body, so that when the body is fitted onto the waterproof shell or sealing ring, it can maintain a complete ring shape while also having a certain degree of deformation performance.

[0077] Specifically, the annular skeleton core can be fitted to either the waterproof outer shell 20 or the sealing ring 11, and the skeleton core can maintain the annular structure without being altered. The rubber layer is designed to deform under pressure.

[0078] In this embodiment, the skeleton core is made of metal. Protrusions or grooves are provided on the outer surface of the skeleton core to enhance the restraining effect between the rubber layer and the skeleton core. Using a skeleton core made of metal improves the structural stability of the skeleton core, and the restraining method using protrusions or grooves is simple in principle and easy to implement.

[0079] Specifically, the skeleton core has multiple protrusions, which connect to the rubber layer to improve the bonding strength of the rubber layer. There can be one or more grooves to accommodate the rubber layer. Alternatively, the skeleton core can have multiple protrusions, and the rubber layer can have multiple grooves, with the skeleton core and rubber layer connected using a convex-concave fit; the reverse is also possible.

[0080] like Figure 6 As shown, to further improve the waterproof performance of the housing, the housing assembly also includes a sealing gasket 40. The sealing gasket 40 has a first sealing surface 41 and a second sealing surface 42 facing each other. The first sealing surface 41 and / or the second sealing surface 42 are planar and respectively abut against the end face of the opening end of the waterproof housing 20 and the surface of the waterproof base 10. By providing the sealing gasket 40, and with the first sealing surface 41 and the second sealing surface 42 respectively abutting against the end face of the opening end of the waterproof housing 20 and the surface of the waterproof base 10, the waterproof performance of the housing assembly can be further improved.

[0081] Specifically, the outer circumferential surface of the sealing ring 11 mates with the inner circumferential surface of the waterproof housing 20, and the sealing gasket 40 is fitted onto the outer circumferential surface of the sealing ring 11. After the waterproof housing 20 is installed in place, the sealing gasket 40 is pressed downward toward the waterproof base 10.

[0082] In this embodiment, the sealing gasket 40 is made of rubber in a ring shape. Optionally, the sealing gasket 40 is made of the same material as the sealing ring 30.

[0083] In this embodiment, to increase the friction between the sealing gasket 40 and the waterproof housing 20 or the waterproof base 10, one of the first sealing surface 41 and the second sealing surface 42 is non-planar, and annular protrusions are provided on the non-planar first sealing surface 41 or the second sealing surface 42. Multiple annular protrusions have different diameters and are concentrically arranged, forming a Fresnel-like structure on the first sealing surface 41 or the second sealing surface 42. The end face of the open end of the waterproof housing 20 or the surface of the waterproof base 10 has sealing grooves that engage with the multiple annular protrusions. By making one of the first sealing surface 41 and the second sealing surface 42 non-planar, the friction between the sealing gasket 40 and the waterproof housing 20 or the waterproof base 10 can be increased, preventing the sealing gasket 40 from becoming loose after the housing assembly is installed. The multiple annular protrusions forming a Fresnel-like structure simplify the manufacturing process.

[0084] Specifically, the first sealing surface 41 abuts against the bottom opening of the waterproof housing 20, and the second sealing surface 42 contacts the waterproof base 10. An annular protrusion is provided on the second sealing surface 42 to prevent the waterproof housing 20 and the waterproof base 10 from failing to fit tightly together. Alternatively, the annular protrusion can be provided on the first sealing surface 41, or both the first and second sealing surfaces 41 and 42 can have annular protrusions.

[0085] like Figures 1 to 6 As shown, the motor body 50 extends partially when disposed within the housing assembly. The motor body 50 has a motor shaft 51. At least a portion of the motor body 50 is disposed within the housing assembly, and the waterproof outer shell 20 of the housing assembly has an opening for accommodating the motor shaft 51, which extends from the opening to the outside of the housing assembly, and the opening has a sealing oil cavity 60. By placing the motor body 50 within the housing assembly, with the motor shaft 51 partially extending out of the housing assembly, and providing a sealing oil cavity 60 at the opening of the waterproof outer shell 20, the immiscibility of oil and water provides a good sealing effect.

[0086] Specifically, the sealing oil chamber 60 is only located around the motor shaft 51. The volume of the sealing oil chamber 60 does not need to be too large; a partial installation is sufficient to achieve the protection effect.

[0087] like Figures 1 to 6 As shown, the surface of the opening of the waterproof housing 20 bulges outward to form a raised portion 21, and a sealing oil cavity 60 is formed at the raised portion 21. The raised portion 21 allows the sealing oil cavity 60 to store more oil, thereby improving the oil sealing effect.

[0088] Specifically, the raised portion 21 of the waterproof housing 20 improves the sealing of the oil cavity 60. This simple structure reduces lubricant leakage, isolates water from the motor body 50, and provides lubrication for the motor shaft 51, reducing wear during prolonged use. It also dissipates heat from the motor shaft 51 during extended use, lowering its temperature and thus extending the service life of the motor body 50.

[0089] like Figures 1 to 6 As shown, the waterproof base 10 has a connecting part 70. The cleaning equipment is connected via the connecting part 70, thereby securing the entire housing assembly.

[0090] Specifically, the connecting part 70 has a threaded hole, and the waterproof base 10 is connected to the housing of the cleaning equipment by bolts.

[0091] This invention offers the following advantages: Since the waterproof housing 20 and the waterproof base 10 need to be assembled together, structural improvements alone cannot guarantee an effective seal. Therefore, by placing a sealing ring 30 between them, the sealing performance of the assembled housing assembly can be effectively improved. Furthermore, the sealing ring 30 is positioned radially on the waterproof base 10 and the waterproof housing 20, forming a radial seal that effectively isolates the external environment from the internal space of the housing assembly. Simultaneously, the direction of the compressive force applied to the sealing ring 30 by the waterproof housing 20 and the waterproof base 10 differs from their assembly direction, effectively preventing the sealing ring 30 from failing due to long-term compression, thus ensuring its service life and preventing leakage caused by its failure. Moreover, compared to potting sealant, this method facilitates the inspection and replacement of components within the housing assembly, thereby improving ease of use and versatility.

[0092] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0093] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A housing assembly for a water-resistant electric motor, characterized by, The waterproof housing assembly comprises: a waterproof base having an axially extending sealing ring; a waterproof shell, an open end of the waterproof shell is arranged towards the waterproof base, and an inner circumferential surface and / or an outer circumferential surface of the open end of the waterproof shell is arranged in abutment with the sealing ring, a sealing cavity for accommodating the waterproof motor is formed between the waterproof base and the waterproof shell; a sealing ring, the sealing ring is arranged between the inner circumferential surface and / or the outer circumferential surface of the open end of the waterproof shell and the sealing ring, and the inner circumferential surface and / or the outer circumferential surface of the open end of the waterproof shell and / or the sealing ring is provided with a mounting groove for accommodating the sealing ring; wherein the uncompressed cross-sectional diameter D0 of the sealing ring and the depth H of the mounting groove satisfy: 0.7<H / D0<0.

8.

2. The housing assembly for a waterproof electric motor of claim 1, wherein, The radial mounting gap D1 between the waterproof shell and the sealing ring and the depth H of the mounting groove satisfy: 0<H / D1<0.

09.

3. The housing assembly for the waterproof motor according to claim 1, wherein the sealing ring satisfies the following requirements: ； where C is the compression of the seal ring, C r is the compression ratio of the seal ring, C r has a value of 10% - 30%, D3 is the inner diameter of the waterproof housing, and D2 is the outer diameter of the seal ring, the uncompressed cross-sectional diameter D0 of the sealing ring is obtained by the following way: 。 4. The housing assembly for the waterproof motor according to claim 1, wherein an outer circumferential surface of the waterproof base has a radially extending circumferential flange, the sealing ring is located inside the circumferential flange, and an outer circumferential surface of the sealing ring is provided with the sealing ring, and an end surface of the open end of the waterproof shell abuts on the circumferential flange; or the sealing ring is flush with the outer circumferential surface of the waterproof base, and an inner circumferential surface of the sealing ring is provided with the sealing ring; or the sealing ring is two, and the diameters of the two sealing rings are different, so that a sealing groove is formed between the two sealing rings, and the open end of the waterproof shell is inserted into the sealing groove.

5. The housing assembly for the waterproof motor according to claim 1, wherein the sealing ring is multiple, and the multiple sealing rings are arranged in an axial direction of the sealing ring.

6. The housing assembly for a waterproof electric motor of claim 1, wherein, The sealing ring comprises a body, and the body comprises: a skeleton core in a ring shape; a rubber layer covering an outer portion of the skeleton core, and a hardness of the skeleton core is greater than a hardness of the rubber layer.

7. The housing assembly for the waterproof motor according to claim 6, wherein the skeleton core is made of a metal material; and / or a convex or a groove is arranged on an outer surface of the skeleton core to increase a limiting effect of the rubber layer on the skeleton core.

8. The housing assembly for the waterproof motor according to any one of claims 1 to 7, wherein the housing assembly further comprises a sealing gasket having opposite first and second sealing surfaces, and the first and / or the second sealing surface is a plane and abuts on an end surface of the open end of the waterproof shell and a surface of the waterproof base, respectively.

9. The housing assembly for the waterproof motor according to claim 8, wherein One of the first sealing surface and the second sealing surface is non-planar, and a ring-shaped protrusion is arranged on the non-planar first sealing surface or the second sealing surface, and the ring-shaped protrusion is multiple, the diameters of the multiple ring-shaped protrusions are different and the multiple ring-shaped protrusions are concentrically arranged, so that a Fresnel structure is formed on the first sealing surface or the second sealing surface, and an end surface of an open end of the waterproof shell or a surface of the waterproof base has a sealing groove embedded with the multiple ring-shaped protrusions.

10. A waterproof motor assembly, characterized by, Comprising: a motor body having a motor shaft; The shell assembly of any one of claims 1 to 9, at least a portion of the motor body is arranged in the shell assembly, and a waterproof shell of the shell assembly has an opening for avoiding the motor shaft, the motor shaft is protruded to outside of the shell assembly by the opening, and the opening has a sealed oil cavity.

11. The waterproof motor assembly of claim 10, wherein, A surface of the opening of the waterproof shell is outwardly protruded to form a protrusion, and the sealed oil cavity is formed at the protrusion.

12. A cleaning apparatus, characterized by The waterproof motor assembly of any one of claims 10 to 11.

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