Draining pump rotor starting mechanism, draining pump motor and draining pump

Abstract

The invention relates to a draining pump rotor starting mechanism, a draining pump motor and a draining pump. The draining pump rotor starting mechanism comprises a magnetic core, a rotor shaft, a rotor shaft sleeve and a shock absorption body, wherein a cylindrical surface wall is arranged in a starting cavity of the magnetic core; the outer side surface of the cylindrical surface wall is partially connected with the inner wall of the starting cavity through a starting rib; an accommodating cavity for accommodating the shock absorption body is formed in a space between the outer side surface, which is not connected with the starting rib, in the cylindrical surface wall and the inner wall surface of the starting cavity to which the outer side surface faces; the shock absorption body can be driven by the starting rib to slide in the accommodating cavity; and the sliding shock absorption body drives the rotor shaft to rotate through a transmission rib. Therefore, the draining pump rotor starting mechanism can guarantee the concentricity of all components during rotation, optimize the noise reducing effect and prolong the service life; and meanwhile, the acceleration angle stroke can be increased, and the starting performance of the starting mechanism can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a drainage pump rotor starting mechanism, a drainage pump motor and a drainage pump. Background technique [0002] Currently, see Figure 1 to Figure 6 The drainage pump motor of the washing machine drainage pump x1 generally adopts a U-shaped stator iron core permanent magnet synchronous motor capable of self-starting. Rotor bushing x23. The rotor sleeve x23 and the injection-molded magnetic core x21 are axial hole clearance fit, and the outer wall of the tubular main body of the rotor sleeve x23 protrudes to form a transmission rib x231; the injection-molded magnetic core x21 has a housing for the rotor sleeve In the starting cavity of x23, the inner wall of the starting cavity protrudes to form a starting rib x211. There will be interference between the driving rib x231 and the starting rib x211 to form two sets of interference surfaces, and a rubber column (x24 and x25) is i...

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Problems solved by technology

[0003] However, since the rubber columns (x24 and x25) are in the state of being compressed and elastically deformed during the rotation of the rotor starting mechanism x2, the rubber columns (x24 and x25) will radially impact the rotor sleeve x23 and the injection molding The magnetic core x21 produces a certain force, so the rotor sleeve x23 and the injection molded magnetic core x21 will be biased under the elastic force, resulting in poor concentricity between the rotor sleeve x23 and the injection molded magnetic core x21, and the rotor shaft x22 Improper eccentricity will also cause certain noise and will greatly reduce the service life of the rotor shaft x22 and bearings

[0004] In addition, due to the uncertainty of the rotation direction of the existing rotor starting mechanism x2, two rubber columns (x24 and x25) need to be added in the starting cavity of the injection molded magnetic core x21, and the injection molded magnetic core x21 starts to rotate under the action of the magnetic field force , the two rubber columns (x24 and x25) will limit the acceleration stroke of the injection molded magnetic core x21 after starting, that is, before driving the impeller to rotate, the acceleration angle stroke of the rotor starting mechanism x2 is only ∠a, such as Figure 7 As shown, ∠a is much smaller than 360°, so the starting performance of the existing rotor starting mechanism x2 is greatly limited

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