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KR-20260067772-A - Drain pump

KR20260067772AKR 20260067772 AKR20260067772 AKR 20260067772AKR-20260067772-A

Abstract

The present invention relates to a drain pump that continuously supplies oil to one end of a shaft to improve product quality. A drain pump according to the present invention comprises a bracket (100) having an internal receiving space (110), a motor (200) equipped with a rotor (210) and a stator () to generate rotational force, an impeller (300) that rotates by the rotational force of the motor (200), and a shaft (400) that transmits the rotational force of the motor (200) to the impeller (300); in the receiving space (110), an installation groove (500) is formed so as to be recessed on one side to receive one end of the shaft (400); and in the installation groove (500), a support sheet (510) that contacts one end of the shaft (400) and a retaining member (520) that supplies oil to the support sheet (510) are further provided. According to the present invention, there is an advantage of improved product reliability.

Inventors

  • 이수종
  • 진종탁
  • 강인식
  • 한원일
  • 김도환

Assignees

  • 주식회사 오성기전

Dates

Publication Date
20260513
Application Date
20241106

Claims (5)

  1. It includes a bracket (100) having a receiving space (110) formed inside, a motor (200) equipped with a rotor (210) and a stator () to generate rotational force, an impeller (300) that rotates by the rotational force of the motor (200), and a shaft (400) that transmits the rotational force of the motor (200) to the impeller (300); In the above receiving space (110), an installation groove (500) is formed so as to be recessed to one side in which one end of the shaft (400) is received; In the above installation groove (500), A drain pump characterized by further comprising a support seat (510) in contact with one end of the shaft (400) and a retaining member (520) that supplies oil to the support seat (510).
  2. In claim 1, at one end of the installation groove (500), A drain pump characterized by having a circular member groove (522) formed that is recessed outwardly, and the retaining member (520) being inserted into and received in the member groove (522).
  3. In claim 2, the support sheet (510) is, A drain pump characterized by being composed of one or more than two and having a thickness of 1 mm or more.
  4. In claim 3, the holding member (520) is, A drain pump characterized by being made of an oil-absorbing material, absorbing oil adhering to the surface of the support sheet (510) or supplying oil to the support sheet (510).
  5. A drain pump characterized in that, in claim 4, the outer diameter of the support sheet (510) is smaller than the inner diameter of the installation groove (500), and the oil of the retaining member (520) is supplied to the contact area between the shaft (400) and the support sheet (510) through the gap between the support sheet (510) and the inner surface of the installation groove (500).

Description

Drain pump The present invention relates to a drain pump, and more specifically, to a drain pump that continuously supplies oil to a shaft to improve product quality. Drain pumps are mainly used in washing machines, air conditioners, etc. Generally, the drain pump of a washing machine rotates an impeller driven by a motor to supply washing water to the circulation pipe during washing and rinsing to enable circulation, and during drainage, it supplies washing water to the drain pipe to enable drainage. In such drain pumps, the motor and impeller are typically connected by a single shaft, and the upper and lower ends of the shaft are inserted into brackets or similar devices to rotate. Therefore, there are problems such as friction or wear occurring at the upper and lower ends of the shaft in contact with the bracket, which leads to issues such as noise generation or reduced rotational force. FIG. 1 is a cross-sectional view showing the configuration of a preferred embodiment of a drain pump according to the present invention. FIG. 2 is an enlarged partial cross-sectional view of the support portion of the shaft constituting the drain pump according to the present invention. FIG. 3 is a partial enlarged cross-sectional view showing the state in which oil is supplied from a retaining member constituting a drain pump according to the present invention. The drain pump according to the present invention will be described in detail below with reference to the attached drawings. FIG. 1 shows a front cross-sectional view showing the configuration of a preferred embodiment of a drain pump according to the present invention, and FIG. 2 shows an enlarged partial cross-sectional view of a supporting portion of a shaft constituting the drain pump according to the present invention. As illustrated in these drawings, the drain pump (10) according to the present invention comprises a bracket (100) having a receiving space (110) formed inside, a motor (200) equipped with a rotor (210) and a stator () to generate rotational force, an impeller (300) that rotates by the rotational force of the motor (200), and a shaft (400) that transmits the rotational force of the motor (200) to the impeller (300). As illustrated, the above bracket (100) may be composed of one or more components that constitute the exterior of the drain pump (10) according to the present invention. A receiving space (110) of a predetermined size is formed inside the bracket (100), and a plurality of parts such as the motor (200) may be provided in this receiving space (110). The above motor (200) can have the function of receiving (electric) energy from an external source, such as a general motor, and converting it into mechanical movement (rotational movement), and is often used to mean an electric motor. The above motor (200) may be composed of a rotor (210), also called a rotor, and a stator (220), also called a stator. In this way, the motor (200) may be composed of a rotor (210) and a stator (220), and a shaft (400), called a motor shaft, may be installed by penetrating vertically (in the drawing) through the center of the motor (200). An impeller (300) may be installed at the lower end of the shaft (400). Accordingly, the shaft (400) can serve to transmit the rotational force generated by the motor (200) to the impeller (300). The above receiving space (110) may have a cylindrical or columnar shape to accommodate a motor (200) composed of the rotor (210) and the stator (220), and an installation groove (500) may be formed on one side so as to be recessed to accommodate one end of the shaft (400) at the top. That is, the central part of the upper surface of the receiving space (110) is recessed upward to further form the installation groove (500), and the upper end of the shaft (400) is received and mounted in the installation groove (500). The above-mentioned installation groove (500) may have a cylindrical shape having an inner diameter smaller than that of the receiving space (110), and the above-mentioned installation groove (500) may further be provided with a support sheet (510) that contacts one end of the shaft (400) and a retaining member (520) that supplies oil to the support sheet (510). Specifically, the above-mentioned installation groove (500) is further provided with a circular support sheet (510). The support sheet (510) is a part that contacts and supports one end (the top in the drawing) of the shaft (400). That is, the support sheet (510) supports the top of the shaft (400) so that it can rotate in contact with it. The support sheet (510) is preferably made of a material having mechanical properties and wear resistance. That is, the support sheet (510) may be made of nylon plastic. The above support sheet (510) may consist of one or more than two and may have a thickness of 1 mm or more. It is preferable that the support sheet (510) be configured to support the shaft (400) while withstanding external impacts, and for this purpose, it m