A plastic-sealed motor for a sink-type dishwasher

Abstract

The present invention discloses a plastic-sealed motor for a sink-type dishwasher, which comprises a stator and a rotor; a plastic-sealed layer is wrapped outside the stator; one end of the rotor protrudes outside the plastic-sealed layer and extends into the sink-type dishwasher together with the plastic-sealed layer; a first sealing structure is also arranged between the rotor and the plastic-sealed layer; a nylon insert which is threadedly connected with the bottom of the cylinder on the sink-type dishwasher is also arranged on one side of the plastic-sealed layer; one end of the nylon insert is clamped between the stator and the plastic-sealed layer, and a sealing structure is also arranged between the other end and the bottom of the cylinder; the first sealing structure prevents the water in the sink-type dishwasher from entering the motor interior along the central axis; the nylon insert not only ensures the connection strength, but also plays a supporting role to prevent the stator from being washed out and displaced by the plastic-sealing material; the sealing structure enables the bolt connection part between the plastic-sealed motor and the sink-type dishwasher to have good sealing performance; reduces the mechanical friction loss of the plastic-sealed motor, improves the efficiency and has better stability.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic-encapsulated motors, and more specifically, to a plastic-encapsulated motor for a sink-type dishwasher with sealing, moisture-proof, and stable performance. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of life, and thus higher and higher requirements for kitchen utensils, aiming to simplify the cumbersome housework. Therefore, sink-type dishwashers are widely used. The sink-type dishwasher needs to use a motor to drive the water in the dishwasher to rotate to achieve the purpose of washing tableware. Therefore, how to prevent water from entering the motor and improve stability has always been a problem to be solved in the industry.

[0003] The cooperation between traditional sink-type dishwashers and motors has the following problems:

[0004] 1. For traditional motors, generally an aluminum shell structure is adopted, and the protection level is IP00, with poor waterproof effect. When connecting with the bottom of the dishwasher cylinder, a sealing ring or oil seal is set at the joint, not only the sealing effect is poor, but also the oil seal will damage the motor shaft, greatly increasing the mechanical friction loss of the motor and reducing the efficiency of the motor.

[0005]

[0006] 2. When using a traditional plastic-encapsulated motor, due to its structural characteristics, it is impossible to machine screw holes for fixing the motor, and the connection stability is poor. Summary of the Invention

[0007] The purpose of the present invention is to provide a plastic-encapsulated motor for a sink-type dishwasher with sealing, moisture-proof, and stable performance, and solve the above technical problems.

[0008] To achieve the above technical purpose and meet the above technical requirements, the technical solution adopted by the present invention is: a plastic-encapsulated motor for a sink-type dishwasher, including a stator and a rotor; a plastic-encapsulated layer is wrapped outside the stator; one end of the rotor protrudes outside the plastic-encapsulated layer and extends into the sink-type dishwasher together with the plastic-encapsulated layer; its characteristics are: a first sealing structure is further provided between the rotor and the plastic-encapsulated layer; a nylon insert threaded to the bottom of the sink-type dishwasher is further provided on one side of the plastic-encapsulated layer; one end of the nylon insert is stuck between the stator and the plastic-encapsulated layer, and a sealing structure is further provided between the other end and the bottom of the cylinder.

[0009] As a preferred technical solution: an interference fit is provided between the plastic-encapsulated layer and the bottom of the cylinder.

[0010] As a preferred technical solution: a rear end cover is further provided on the other side of the plastic-encapsulated layer.

[0011] As a preferred technical solution: A lead wire structure is further provided between the rear end cover and the stator.

[0012] As a preferred technical solution: The rotor includes a central shaft, a rotor press-fitting part connected to the central shaft and mating with the stator, bearings connected to the central shaft and respectively mating with the plastic encapsulation layer and the rear end cover, and an impeller assembly connected to the end of the central shaft.

[0013] As a preferred technical solution: The impeller assembly is arranged inside the sink type dishwasher and includes an impeller sleeved on the central shaft, and a locking structure and a sealing gasket for fixing the impeller.

[0014] As a preferred technical solution: The first sealing structure includes a dynamic seal connected to the central shaft, and a static seal connected to the plastic encapsulation layer and mating with the dynamic seal.

[0015] As a preferred technical solution: The sealing structure includes a sealing body stuck on the nylon insert, an annular upper lip opening arranged on the upper end face of the sealing body and fitting with the bottom of the cylinder, and an annular lower lip opening arranged on the lower end face of the sealing body and fitting with the upper end face of the nylon insert.

[0016] The beneficial effects of the present invention are as follows: For a plastic encapsulated motor used in a sink type dishwasher, compared with the traditional structure: A first sealing structure is further provided between the rotor and the plastic encapsulation layer; A nylon insert threadedly connected to the bottom of the cylinder on the sink type dishwasher is further provided on one side of the plastic encapsulation layer; One end of the nylon insert is stuck between the stator and the plastic encapsulation layer, and a sealing structure is further provided between the other end and the bottom of the cylinder; The provision of the first sealing structure prevents the water in the sink type dishwasher from entering the motor along the central shaft; The provision of the nylon insert not only ensures the connection strength between the plastic encapsulated motor and the sink type dishwasher, but also plays a supporting role to prevent the stator from being washed out and displaced by the plastic encapsulation material; The provision of the sealing structure enables good sealing performance at the bolt connection between the plastic encapsulated motor and the sink type dishwasher; The combination of multiple sealing structures and the structural design reduce the mechanical friction loss of the plastic encapsulated motor, improve the efficiency, have good waterproof effect and better stability. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the installation structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 Partial enlarged view in the direction of A;

[0019] Figure 3 For the present invention Figure 1 Partial enlarged view in the direction of B;

[0020] Figure 4 It is a schematic diagram of the water leakage flow direction of the present invention;

[0021] Figure 5 For the present invention Figure 1 Partial enlarged view in the C direction;

[0022] Figure 6 3D schematic diagram of the present invention;

[0023] In the figure: 101. Sink dishwasher, 102. Bottom of the cylinder, 1. Stator, 2. Rotor, 3. Plastic encapsulation layer, 4. First sealing structure, 5. Nylon insert, 6. Sealing structure, 7. Rear end cover, 8. Lead-out wire structure, 2-1. Central shaft, 2-2. Rotor press-fitting part, 2-3. Bearing, 2-4. Impeller assembly, 2-5. Impeller, 2-6. Locking structure, 2-7. Sealing washer, 4-1. Dynamic seal, 4-2. Static seal, 6-1. Sealing body, 6-2. Annular upper lip, 6-3. Annular lower lip. Specific embodiments

[0024] The present invention will be further described below in conjunction with the accompanying drawings;

[0025] In the accompanying drawings: A plastic-encapsulated motor for a sink dishwasher includes a stator 1 and a rotor 2; the outside of the stator 1 is wrapped with a plastic encapsulation layer 3; one end of the rotor 2 protrudes outside the plastic encapsulation layer 3 and extends into the sink dishwasher 101 together with the plastic encapsulation layer 3; a first sealing structure 4 is further provided between the rotor 2 and the plastic encapsulation layer 3; the first sealing structure 4 includes a dynamic seal 4-1 connected to the central shaft 2-1 and a static seal 4-2 connected to the plastic encapsulation layer 3 and cooperating with the dynamic seal 4-1; a nylon insert 5 threadedly connected to the bottom of the cylinder 102 on the sink dishwasher 101 is further provided on one side of the plastic encapsulation layer 3; one end of the nylon insert 5 is stuck between the stator 1 and the plastic encapsulation layer 3, and a sealing structure 6 is further provided between the other end and the bottom of the cylinder 102; a rear end cover 7 is further provided on the other side of the plastic encapsulation layer 3; a lead-out wire structure 8 is further provided between the rear end cover 7 and the stator 1; during actual use, the plastic-encapsulated motor is actuated by connecting to an external control structure through the lead-out wire structure 8. Due to the provision of the first sealing structure 4, with the cooperation of the dynamic seal 4-1 and the static seal 4-2, when the sealing surface wears, the elastic structure on the dynamic seal 4-1 plays a compensating role and continues to cooperate with the static seal 4-2 to ensure the sealing effect; the nylon insert 5 is provided, which not only ensures the connection strength between the plastic-encapsulated motor and the sink dishwasher 101, but also plays a supporting role to prevent the stator from being washed out and displaced by the plastic encapsulation material; the sealing structure 6 is provided, and the annular upper lip 6-2 and the annular lower lip 6-3 are compressed during the cooperation process, and after being squeezed, it is ensured that the sealing structure 6 is completely adhered to the bottom of the cylinder 102, with good sealing performance; the combination of multiple sealing structures and the design of the structure reduce the mechanical friction loss of the plastic-encapsulated motor, improve the efficiency, have good waterproof effect, and better stability.

[0026] In Figure 1 : An interference fit exists between the encapsulation layer 3 and the cylinder bottom 102, ensuring the sealing performance between the encapsulation layer 3 and the cylinder bottom 102 and preventing water leakage inside the sink-type dishwasher 101. By providing a ring of bosses 103 on the edge of the encapsulation layer 3, with the bosses 103 flush with the upper surface of the annular upper lip 6-2, the sealing performance between the encapsulation layer 3 and the cylinder bottom 102 is further ensured.

[0027] In Figure 1 、 Figure 5 : The rotor 2 includes a central shaft 2-1, a rotor press-fitting part 2-2 connected to the central shaft 2-1 and mating with the stator 1, bearings 2-3 connected to the central shaft 2-1 and respectively cooperating with the encapsulation layer 3 and the rear end cover 7, and an impeller assembly 2-4 connected to the end of the central shaft 2-1. The impeller assembly 2-4 is arranged inside the sink-type dishwasher 101 and includes an impeller 2-5 sleeved on the central shaft 2-1, and a locking structure 2-6 and a sealing gasket 2-7 for fixing the impeller 2-5, ensuring smooth and reliable rotation of the rotor 2.

[0028] In Figure 1 、 Figure 3 : The sealing structure 6 includes a sealing body 6-1 stuck on the nylon insert 5, an annular upper lip 6-2 provided on the upper end face of the sealing body 6-1 and fitting with the cylinder bottom 102, and an annular lower lip 6-3 provided on the lower end face of the sealing body 6-1 and fitting with the upper end face of the nylon insert 5. During actual use, the annular upper lip 6-2 and the annular lower lip 6-3 are deformed by extrusion, and multiple annular circles form a protective structure, resulting in better sealing performance.

[0029] In Figure 4 : When leakage occurs, water seeps into or outside the encapsulated motor along the arrow direction.

[0030] The above embodiments are merely descriptions for clearly explaining the present invention and are not limitations on the implementation manners. For those skilled in the art, based on the above description, other different forms of changes or variations can be made. It is not necessary and impossible to enumerate all the implementation manners here, and the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A plastic-sealed motor for a sink-type dishwasher, comprising a stator (1) and a rotor (2); the outside of the stator (1) is wrapped with a plastic-sealed layer (3); one end of the rotor (2) protrudes outside the plastic-sealed layer (3) and extends into the sink-type dishwasher (101) together with the plastic-sealed layer (3); characterized in that: A first sealing structure (4) is further provided between the described rotor (2) and the plastic encapsulation layer (3); a nylon insert (5) which is threadedly connected to the bottom of the cylinder (102) on the sink type dishwasher (101) is further provided on one side of the plastic encapsulation layer (3); one end of the nylon insert (5) is clamped between the stator (1) and the plastic encapsulation layer (3), and a sealing structure (6) is further provided between the other end and the bottom of the cylinder (102); the rotor (2) includes a central shaft (2-1), a rotor press-fitting part (2-2) connected to the central shaft (2-1) and mating with the stator (1), a bearing (2-3) connected to the central shaft (2-1) and respectively mating with the plastic encapsulation layer (3) and the rear end cover (7), and an impeller assembly (2-4) connected to the end of the central shaft (2-1). The described impeller assembly (2-4) is arranged inside the sink type dishwasher (101) and includes an impeller (2-5) sleeved on the central shaft (2-1), and a locking structure (2-6) and a sealing washer (2-7) for fixing the impeller (2-5). The described first sealing structure (4) includes a dynamic seal (4-1) connected to the central shaft (2-1), and a static seal (4-2) connected to the plastic encapsulation layer (3) and mating with the dynamic seal (4-1). The described sealing structure (6) includes a sealing body (6-1) clamped on the nylon insert (5), an annular upper lip (6-2) provided on the upper end face of the sealing body (6-1) and fitting with the bottom of the cylinder (102), and an annular lower lip (6-3) provided on the lower end face of the sealing body (6-1) and fitting with the upper end face of the nylon insert (5).

2. The plastic-encapsulated motor for a sink-type dishwasher according to claim 1, wherein: An interference fit is provided between the plastic encapsulation layer (3) and the bottom of the cylinder (102).

3. The plastic-encapsulated motor for a sink-type dishwasher according to claim 2, wherein: A rear end cover (7) is further provided on the other side of the plastic encapsulation layer (3).

4. A plastic-encapsulated motor for a sink-type dishwasher according to claim 3, characterized in that: A lead-out wire structure (8) is further provided between the rear end cover (7) and the stator (1).

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