Waterproof motor for cleaning machine

Abstract

The utility model discloses a waterproof motor for a cleaning machine, which comprises a motor shell provided with a bearing chamber, and a motor shaft is mounted and connected with the bearing chamber in a relative rotation manner through a bearing; a motor shaft penetrates through the bearing chamber and extends outwards to be fixedly connected with the movable impeller. The outer end of the bearing chamber is provided with a sealing ring arranged on the periphery of the motor shaft in a sleeving mode, and the sealing ring is in clearance fit with the bearing and located between the bearing chamber and the movable impeller. A notch is formed in the outer end of the bearing chamber, and a protrusion matched with the notch in a sealing and embedded mode is arranged at the end, close to the bearing chamber, of the sealing ring. According to the utility model, water vapor outside the bearing chamber can be prevented from entering the motor to damage the bearing, and when the motor is in high-speed rotation work, good sealing requirements can still be stably and reliably met, and the service life of a cleaning machine using the motor is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of cleaning machines, and particularly relates to a waterproof motor used for cleaning machines. Background Art

[0002] The diversification of home appliance usage scenarios has led to higher requirements for the waterproof performance of motors in cleaning machines (commonly known as "floor scrubbers"). Currently, products on the market mostly use oil seals, shaft seals, or sealing rings to ensure the waterproof performance of cleaning machine motors. However, these sealing structures generally suffer from a short lifespan. Since cleaning machine motors typically rotate at high speeds during operation, current sealing structures can severely impact the lifespan of these motors.

[0003] Therefore, the applicant hopes to seek technical solutions to solve the above technical problems. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a waterproof motor for a cleaning machine, which can prevent water vapor outside the bearing chamber from entering the motor and causing damage to the bearings. When the motor is working at high speed, it can still stably and reliably meet good sealing requirements, thereby ensuring the service life of the cleaning machine in which it is used.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A waterproof motor for a cleaning machine comprises a motor housing provided with a bearing chamber, wherein a motor shaft is rotatably mounted and connected to the bearing chamber via a bearing; the motor shaft extends outward through the bearing chamber and is fixedly mounted and connected to a moving impeller; wherein:

[0007] The outer end of the bearing chamber is provided with a sealing ring sleeved on the outer periphery of the motor shaft, the sealing ring is in clearance fit with the bearing, and is located between the bearing chamber and the impeller;

[0008] The outer end of the bearing chamber is provided with a notch, and the end of the sealing ring close to the bearing chamber is provided with a protrusion which is sealed and embedded in the notch.

[0009] Preferably, sealing grease is pre-stored in the notch; wherein, when the notch is fitted with its corresponding protrusion, the sealing grease fills the fitting gap between the sealing ring and the bearing chamber.

[0010] Preferably, the bearing chamber and the outer periphery of the bearing are fitted with clearance.

[0011] Preferably, the number of the notches is 2-4, and the end of the sealing ring close to the bearing chamber is provided with a plurality of protrusions which are embedded and fitted with the notches in a one-to-one correspondence.

[0012] Preferably, a stator impeller is fixedly mounted on the outer end of the bearing chamber, and the stator impeller is sleeved on the outer circumference of the sealing ring.

[0013] Preferably, an undercut groove is provided on the outer periphery of the sealing ring end away from the bearing chamber, and the inner periphery of the stator impeller is sealingly fitted in the undercut groove.

[0014] Preferably, sealing grease is pre-stored in the undercut groove; wherein, when the undercut groove is fitted with the inner periphery of the stator impeller, the sealing grease fills the fitting gap between the sealing ring and the stator impeller.

[0015] Preferably, the inner periphery of the stator is provided with an undercut convex edge which is correspondingly fitted into the undercut groove.

[0016] Preferably, the bearing chamber is located at one end of the motor housing and is an integrally processed structure of the motor housing.

[0017] Preferably, the motor housing includes a rotor assembly fixed integrally with the motor shaft, and a stator assembly located on the periphery of the rotor assembly.

[0018] The present application proposes to set up a bearing chamber on the motor housing, and then set up a sealing ring that is sealed and embedded with the outer end of the bearing chamber in the form of a groove-protrusion. This sealing structure can prevent water vapor outside the bearing chamber from entering the interior of the motor and causing damage to the bearing. When the motor is working at high speed, it can still stably and reliably meet good sealing requirements, thereby ensuring the service life of the cleaning machine to which it is applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a waterproof motor according to a specific embodiment of the present invention;

[0020] Figure 2 It will Figure 1 Schematic diagram of the structure after rotation at a certain angle;

[0021] Figure 3 yes Figure 2 Cross-sectional view in EE direction;

[0022] Figure 4 yes Figure 1 Schematic diagram of the decomposition structure;

[0023] Figure 5 It is a structural schematic diagram of the lower sealing ring in a specific implementation manner of the utility model. DETAILED DESCRIPTION

[0024] An embodiment of the present utility model discloses a waterproof motor for a cleaning machine, comprising a motor housing provided with a bearing chamber, wherein the motor shaft is rotatably mounted and connected to the bearing chamber via a bearing; the motor shaft passes through the bearing chamber and extends outwardly and is fixedly mounted and connected to a moving impeller; wherein, the outer end of the bearing chamber is provided with a sealing ring sleeved on the outer periphery of the motor shaft, the sealing ring is clearance-matched with the bearing and is located between the bearing chamber and the moving impeller; the outer end of the bearing chamber is provided with a notch, and the end of the sealing ring close to the bearing chamber is provided with a protrusion that is sealingly embedded and matched with the notch.

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts should fall within the scope of protection of the present invention.

[0026] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and combined Figure 5 As shown, a waterproof motor for a cleaning machine includes a motor housing 2 provided with a bearing chamber 1, a motor shaft 3 is rotatably mounted and connected to the bearing chamber 1 through a bearing 4, and a sealing ring 5 is provided at the outer end of the bearing chamber 1 and sleeved on the outer periphery of the motor shaft 3. The sealing ring 5 is clearance-matched with the bearing 4 and is located between the bearing chamber 1 and the impeller 6 (the outer periphery of the impeller 6 is provided with an impeller cover 10 fixedly mounted and connected to the motor housing 2); preferably, in order to further facilitate the working scene requirements of long-term high-speed rotation, in this embodiment, the bearing chamber 1 and the outer periphery of the bearing 4 are clearance-matched; the motor shaft 3 passes through the bearing chamber 1 and extends outwardly and is fixedly mounted and connected to the impeller 6; preferably, in order to facilitate compact installation, in this embodiment, a stator impeller 7 is fixedly mounted on the outer end of the bearing chamber 1, and the stator impeller 7 is sleeved on the outer periphery of the sealing ring 5;

[0027] Preferably, in this embodiment, the bearing chamber 1 is located at one end of the motor housing 2 and is an integrally processed structure of the motor housing 2; preferably, in this embodiment, the motor housing 2 is provided with a rotor assembly fixedly mounted as a whole with the motor shaft 3, and a stator assembly magnetically coupled to the rotor assembly;

[0028] It should be noted that the sealing ring 5 involved in this embodiment can be a rubber part, an injection molded part, or a metal part, and this embodiment does not specifically limit it.

[0029] In this embodiment, a notch 11 is provided at the outer end of the bearing chamber 1, and a protrusion 51 is provided at the end of the sealing ring 5 near the bearing chamber 1, which is sealed and fitted with the notch 11. Preferably, in this embodiment, sealing grease is pre-stored in the notch 51 (not shown). When the notch 11 and the corresponding protrusion 51 are fitted together, the sealing grease fills the fitting gap between the sealing ring 5 and the bearing chamber 1, achieving a very reliable and stable sealing effect. Further preferably, in this embodiment, the number of notches 11 is 2-4 (two are shown in the figure), and a plurality of protrusions 51 are provided at the end of the sealing ring 5 near the bearing chamber 1, which are fitted and fitted with each notch 11 in a one-to-one manner (two are shown in the figure).

[0030] Preferably, in order to further ensure the sealing effect and prevent the sealing grease in the embedding gap between the sealing ring 5 and the bearing chamber 1 from being thrown out by high-speed centrifugal force during high-speed operation, in this embodiment, the outer periphery of the end of the sealing ring 5 away from the bearing chamber 1 is provided with an undercut groove 52, and the inner periphery of the stator impeller 7 is sealingly embedded in the undercut groove 52; further preferably, in this embodiment, sealing grease is pre-stored in the undercut groove 52; wherein, when the undercut groove 52 is embedded in the inner periphery of the stator impeller 7, the sealing grease fills the embedding gap between the sealing ring 5 and the stator impeller 7; the inner periphery of the stator impeller 7 is provided with an undercut convex edge 71 which is embedded in correspondence with the undercut groove 52.

[0031] This embodiment proposes to provide an integrally machined bearing chamber 1 on the motor housing 2, and then provide a sealing ring 5 that is sealed and embedded with the outer end of the bearing chamber 1 in the form of a groove and a protrusion. This sealing structure can prevent water vapor outside the bearing chamber 1 from entering the interior of the motor and causing damage to the bearing 4. When the motor is operating at high speed, it can still stably and reliably meet good sealing requirements, thereby ensuring the service life of the cleaning machine to which it is applied.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0033] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method includes only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A waterproof motor for a cleaning machine, characterized in that: It includes a motor housing with a bearing chamber, the motor shaft is connected to the bearing chamber for relative rotation through a bearing; the motor shaft extends outward through the bearing chamber and is fixedly connected to the impeller; wherein, The outer end of the bearing chamber is provided with a sealing ring sleeved on the outer periphery of the motor shaft, the sealing ring is in clearance fit with the bearing, and is located between the bearing chamber and the impeller; The outer end of the bearing chamber is provided with a notch, and the end of the sealing ring close to the bearing chamber is provided with a protrusion which is sealed and embedded in the notch.

2. The waterproof motor for a cleaning machine according to claim 1, characterized in that: Sealing grease is pre-stored in the notch; wherein, when the notch is fitted with the corresponding protrusion, the sealing grease fills the fitting gap between the sealing ring and the bearing chamber.

3. The waterproof motor for a cleaning machine according to claim 1, characterized in that: The bearing chamber and the outer periphery of the bearing are fitted with clearance.

4. The waterproof motor for a cleaning machine according to claim 1, characterized in that: The number of the notches is 2-4, and the end of the sealing ring close to the bearing chamber is provided with a plurality of protrusions which are embedded and matched with the notches in a one-to-one correspondence.

5. The waterproof motor for a cleaning machine according to claim 1, characterized in that: A stator impeller is fixedly mounted on the outer end of the bearing chamber, and the stator impeller is sleeved on the outer periphery of the sealing ring.

6. The waterproof motor for a cleaning machine according to claim 5, characterized in that: An undercut groove is provided on the outer periphery of the end portion of the sealing ring away from the bearing chamber, and the inner periphery of the stator impeller is sealingly embedded in the undercut groove.

7. The waterproof motor for a cleaning machine according to claim 6, characterized in that: Sealing grease is pre-stored in the undercut groove; wherein, when the undercut groove is embedded with the inner periphery of the stator impeller, the sealing grease fills the embedding gap between the sealing ring and the stator impeller.

8. The waterproof motor for a cleaning machine according to claim 6, characterized in that: The inner periphery of the stator is provided with an undercut convex edge which is correspondingly fitted into the undercut groove.

9. The waterproof motor for a cleaning machine according to claim 1, characterized in that: The bearing chamber is located at one end of the motor housing and is an integrally processed structure of the motor housing.

10. The waterproof motor for a cleaning machine according to claim 1, characterized in that: The motor housing includes a rotor assembly fixedly mounted on the motor shaft as a whole, and a stator assembly located on the periphery of the rotor assembly.

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