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CN-121977028-A - Electromagnetic clutch assembly, transmission system and pulsator washing machine

CN121977028ACN 121977028 ACN121977028 ACN 121977028ACN-121977028-A

Abstract

The application provides an electromagnetic clutch assembly, a transmission system and a pulsator washing machine, and belongs to the technical field of fabric treatment equipment. The electromagnetic clutch assembly is characterized in that magnetic units are arranged on at least one attraction end face of the magnetic yoke and the armature, circumferential angles of the magnetic units are not completely equal, circumferential magnetic flux density difference is formed, tangential magnetic pulling force is generated at the attraction moment, the tangential force enables the armature to automatically rotate and finely adjust relative to the magnetic yoke, initial static friction is rapidly overcome, sliding friction work and abrasion are reduced, response speed is improved, temperature rise and noise are reduced, and service life of the assembly is prolonged.

Inventors

  • REN HAO
  • CHEN SHIYU
  • XU HANGJUN
  • ZHANG SHUN
  • YANG JUNCHENG
  • LI HAIJIE

Assignees

  • 珠海格力电器股份有限公司

Dates

Publication Date
20260505
Application Date
20260402

Claims (18)

  1. 1. An electromagnetic clutch assembly, comprising: -an armature (202), -a yoke (201) and-a coil (203), the armature (202) and the yoke (201) being arranged opposite and the armature (202) being movable away from or towards the yoke (201), the coil (203) being adapted to generate a magnetic field when energized, to attract the armature (202) to the yoke (201), and to release the armature (202) when de-energized; Wherein, a plurality of magnetic units (2011) are arranged on at least one attraction end surface of the magnet yoke (201) and the armature (202), the magnetic units (2011) comprise permanent magnet units or magnetizer units which are magnetized and present polarity, and the magnetic units (2011) are arranged at intervals along the circumferential direction, and at least the circumferential angles of part of the units are unequal, so that circumferential magnetic flux density difference is formed and tangential magnetic pulling force is generated during attraction; the magnetic unit (2011) forms a sector-shaped region on the attraction end face, a plurality of sector-shaped regions are arranged in the circumferential direction of the attraction end face, and the plurality of sector-shaped regions are arranged in a circumferential direction according to a preset gradient rule; the preset gradient rule is configured to gradually increase or gradually decrease central angles of the fan-shaped polar regions along the circumferential direction.
  2. 2. The electromagnetic clutch assembly of claim 1 wherein a plurality of the sector regions are alternately arranged in a circumferential direction in the order of N-S-N-S.
  3. 3. The electromagnetic clutch assembly of claim 1 wherein a plurality of the sector regions are circumferentially aligned in sequence and together form a complete circular end face.
  4. 4. The electromagnetic clutch assembly of claim 1 wherein the predetermined gradient schedule is repeated one or more times throughout the circumference to form a cyclical gradient profile.
  5. 5. The electromagnetic clutch assembly of claim 1 wherein the electromagnetic clutch assembly comprises, The circumferential direction of the sucking end face is divided into eight continuous sector-shaped regions, and the central angles of the sector-shaped regions are distributed in a circulating gradient mode of 30-40-50-60-30-40-50-60 degrees along the circumferential direction.
  6. 6. The electromagnetic clutch assembly according to any one of claims 1-5, characterized in that the armature (202) and the yoke (201) are each constructed as a coaxial disc-like structure, and the outer circumferences of the armature (202) and the yoke (201) are each formed with an annular race; wherein the belt groove is used for installing a belt.
  7. 7. The electromagnetic clutch assembly of any one of claims 1-5 further comprising: And one end of the return spring is fixed on the attraction surface of the magnetic yoke (201), and the other end of the return spring is abutted on the attraction surface of the armature (202).
  8. 8. A transmission system comprising the electromagnetic clutch assembly of any one of claims 1-7.
  9. 9. The transmission system of claim 8, wherein the transmission system comprises: A main driving shaft, on which at least two sets of electromagnetic clutch assemblies are axially arranged in parallel; The magnetic yoke (201) of each electromagnetic clutch assembly is fixedly sleeved on the main driving shaft, and the armature (202) is axially and slidably sleeved on the main driving shaft and is opposite to the corresponding magnetic yoke (201); Wherein the armature (202) is attracted to the yoke (201) when the corresponding coil (203) is energized to obtain a torque.
  10. 10. A pulsator washing machine comprising a transmission system as claimed in any one of claims 8 or 9.
  11. 11. The pulsator washing machine of claim 10, wherein the washing machine includes: a drive motor, the output shaft of which is connected with a main drive shaft (10); a first transmission assembly (30) and a second transmission assembly (40) disposed in correspondence with the electromagnetic clutch assembly (20): The input end of the first transmission assembly (30) is in driving connection with one of the armature (202) and the magnetic yoke (201), the output end of the first transmission assembly is connected to the inner cylinder (50) of the corresponding washing cylinder, and the input end of the second transmission assembly (40) is in driving connection with the other of the armature (202) and the magnetic yoke (201), and the output end of the second transmission assembly is connected to the impeller chassis (60) of the corresponding washing cylinder.
  12. 12. The pulsator washing machine as claimed in claim 11, wherein, The input end of the first transmission assembly (30) is in driving connection with the magnetic yoke (201), and the input end of the second transmission assembly (40) is in driving connection with the armature (202).
  13. 13. The pulsator washing machine according to claim 12, characterized in that the second transmission assembly (40) is configured to provide a reverse reversing structure in the transmission chain of the armature (202) to the pulsator chassis (60) so that the rotation direction of the pulsator chassis (60) is opposite to the rotation direction of the inner tub (50) when the first transmission assembly (30) and the second transmission assembly (40) are operated simultaneously.
  14. 14. The pulsator washing machine according to claim 13, wherein the reverse direction reversing structure is configured to increase or decrease an output rotation speed of the pulsator chassis (60) with respect to a rotation speed of the inner tub (50) while achieving a reversal of directions of the inner tub (50) and the pulsator chassis (60), so as to form a rotation speed difference between the pulsator chassis (60) and the inner tub (50).
  15. 15. The pulsator washing machine according to claim 12, wherein the first transmission assembly (30) includes a first belt which is sleeved between an outer edge of the yoke (201) and a drum shaft (501) of an inner drum (50) of the corresponding washing drum to synchronously transmit torque of the yoke (201) to the inner drum (50).
  16. 16. Pulsator washing machine according to claim 12, characterized in that said second transmission assembly (40) comprises: a second belt (401) sleeved between the outer edge of the armature (202) and a belt pulley of a transmission shaft (402); a driving gear (403) coaxially fixed to the drive shaft (402), and A driven gear plate (404) coaxially fixed to the pulsator shaft (601) and meshed with the driving gear (403); Wherein the driving gear (403) and the driven gear disk (404) form a reverse reversing structure so that the rotation direction of the impeller chassis (60) is opposite to the rotation direction of the inner cylinder (50).
  17. 17. Pulsator washing machine according to claim 16, characterized in that the gear ratio of the driving gear (403) and the driven gear disc (404) is set so that the rotation speed of the pulsator chassis (60) is different from the rotation speed of the inner drum (50).
  18. 18. The pulsator washing machine according to any one of claims 11 to 17, wherein the pulsator washing machine is a multi-tub pulsator washing machine having a plurality of washing tubs; wherein each washing cylinder is correspondingly provided with a set of electromagnetic clutch assemblies (20), and a first transmission assembly (30) and a second transmission assembly (40) matched with the electromagnetic clutch assemblies (20).

Description

Electromagnetic clutch assembly, transmission system and pulsator washing machine Technical Field The application relates to the technical field of fabric treatment equipment, in particular to an electromagnetic clutch assembly, a transmission system and a pulsator washing machine. Background In the conventional washing machine, the electromagnetic clutch generally adopts a symmetrical magnetic pole distribution to achieve stable connection between the driving disk and the driven disk. However, this structure has significant limitations in terms of response speed and dynamic control, particularly in a high-precision control scenario requiring frequent switching of the operation state. Disclosure of Invention The embodiment of the application provides an electromagnetic clutch assembly, a transmission system and a pulsator washing machine, wherein the electromagnetic clutch assembly is provided with magnetic units on at least one attraction end surface of a magnet yoke and an armature, circumferential angles of the magnetic units are not completely equal to form circumferential magnetic flux density difference, so that tangential magnetic pulling force is generated at the attraction moment, the armature is enabled to automatically rotate and finely tune relative to the magnet yoke by the tangential force, initial static friction is rapidly overcome, sliding friction work and abrasion are reduced, response speed is improved, meanwhile, temperature rise and noise are reduced, and service life of the assembly is prolonged. Specific: a first aspect of an embodiment of the present application provides an electromagnetic clutch assembly comprising: The armature and the magnetic yoke are oppositely arranged, the armature can be far away from or close to the magnetic yoke, the coil is used for generating a magnetic field when being electrified, so that the armature is attracted to the magnetic yoke, and the armature is released when the power is off; the magnetic yoke comprises a magnetic yoke body, at least one attraction end face of the magnetic yoke body is provided with a plurality of magnetic units, the magnetic units comprise permanent magnet units or magnetizer units which are magnetized to present polarity, the magnetic units are arranged at intervals along the circumferential direction, and at least part of circumferential angles of the magnetic units are unequal, so that circumferential magnetic flux density difference is formed during attraction, and tangential magnetic pulling force is generated. In the above technical solution, the plurality of magnetic units are alternately arranged in the circumferential direction in the form of N-S-N-S, and the circumferential angles of at least one pair of adjacent magnetic units are not equal. In the above technical solution, the circumferential angles of any two adjacent magnetic units in the circumferential direction are not equal. In the above technical solution, the magnetic unit forms a sector area on the actuation end surface, and the plurality of sector areas are sequentially arranged along the circumferential direction and form a complete circular end surface together, and the central angles of the sector areas are unequal. In the above technical solution, a plurality of sector-shaped regions are arranged in the circumferential direction of the engaging end surface, and the plurality of sector-shaped regions are arranged in the circumferential direction according to a preset cyclic gradient rule; the circular gradient rule is that a plurality of sector-shaped regions are arranged in the circumferential direction of the suction end face and are configured to be arranged in the circumferential direction according to a preset gradient rule; the preset gradient rule is configured to gradually increase or gradually decrease central angles of the fan-shaped polar regions along the circumferential direction. In the above technical solution, the preset gradient rule is repeated one or more times over the whole week to form a cyclic gradient distribution. In the technical scheme, eight continuous sector-shaped regions are divided in the circumferential direction of the suction end face, and the central angles of the sector-shaped regions are distributed in a circulating gradient mode of 30-40-50-60-30-40-50-60 degrees along the circumferential direction. In the technical scheme, the armature and the magnetic yoke are both constructed into coaxial disc-shaped structures, and annular belt grooves are formed on the outer circumferences of the armature and the magnetic yoke; Wherein the belt slot is used for installing the belt. In the above technical solution, the electromagnetic clutch assembly further includes: and one end of the return spring is fixed on the attraction surface of the magnetic yoke, and the other end of the return spring is abutted on the attraction surface of the armature. A second aspect of an embodiment of the present application provides a transm