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CN-122001137-A - Motor for diaphragm booster pump of water purifier and assembling and calibrating method thereof

CN122001137ACN 122001137 ACN122001137 ACN 122001137ACN-122001137-A

Abstract

The invention discloses a motor for a diaphragm booster pump of a water purifier and an assembly calibration method thereof. The motor comprises a stator part, a rotor part, a rear end cover part and a front end cover part. The rear end cap portion is provided with a fixed bearing chamber to which the first bearing is fixed. The front end cover part is provided with a floating bearing chamber mechanism which comprises a floating bearing chamber embedded with a second bearing, at least three adjusting arms radially connected with the floating bearing chamber, and an adjusting driving piece arranged on the front end cover and connected with the adjusting arms. By operating the adjusting driving piece, the adjusting arm can be driven to drive the floating bearing chamber to move in a radial plane relative to the front end cover, so that the coaxiality of the second bearing and the first bearing is calibrated. The invention also provides a corresponding assembly calibration method. The scheme can effectively compensate the assembly accumulated error, ensure the high coincidence of the supporting axes at the two ends of the rotor, and obviously improve the running stability, the silencing effect and the bearing life of the motor.

Inventors

  • ZHU ZHONGJIE
  • GU XUEMING
  • ZHANG YAO
  • CHEN YUNFENG
  • CAI SHIQI

Assignees

  • 京马电机有限公司

Dates

Publication Date
20260508
Application Date
20260410

Claims (10)

  1. 1. The motor for the diaphragm booster pump of the water purifier comprises a stator part (100), a rotor part (200), a rear end cover part (300) and a front end cover part (400), wherein the rear end cover part (300) comprises a rear end cover (310) fixedly installed at one end of the stator part (100), the rear end cover (310) is provided with a fixed bearing chamber (311), and a first bearing (312) is embedded in the fixed bearing chamber, and is characterized in that: The front end cover part (400) comprises a front end cover (410) fixedly arranged at the other end of the stator part (100), and a floating bearing chamber mechanism (500) is arranged on the front end cover (410); The floating bearing chamber mechanism (500) includes A floating bearing chamber (510), wherein a second bearing (511) is embedded in the floating bearing chamber (510), An adjustment arm (520) having at least three radially extending links to the outer periphery of the floating bearing chamber (510); The adjusting driving piece (600) is arranged on the front end cover (410) and connected with the adjusting arm (520), and the adjusting driving piece (600) is operated to drive the corresponding adjusting arm (520) to drive the floating bearing chamber (510) to move in a radial plane relative to the front end cover (410).
  2. 2. The motor for a diaphragm booster pump of a water purifier according to claim 1, wherein the adjusting driving member (600) comprises a base (610) rotatably mounted on the front end cover (410), and a sleeve (620) rotatably arranged on the base (610), an eccentric wheel (630) is arranged at the upper end of the sleeve (620), the adjusting arm (520) is an adjusting plate (521), an adjusting hole (522) is formed in the outer side end of the adjusting plate (521), and the rim of the eccentric wheel (630) is in tangential contact with the inner edge of the adjusting hole (522) corresponding to the adjusting plate (521), and the eccentric wheel (630) is rotated to drive the adjusting plate (521) to move radially.
  3. 3. The motor for a water purifier diaphragm booster pump of claim 2, wherein a ratchet limit structure (640) is provided between the base (610) and the sleeve (620) for limiting reverse rotation of the sleeve (620) in an adjustment direction with respect to the base (610).
  4. 4. The motor for a water purifier diaphragm booster pump of claim 3, wherein the ratchet limit structure (640) comprises a first fixed ratchet ring (641) arranged on the base (610), and a first movable ratchet ring (642) arranged at the lower end of the sleeve (620) and meshed with the first fixed ratchet ring (641), and the first fixed ratchet ring (641) is matched with the first movable ratchet ring (642) to enable the sleeve (620) to rotate unidirectionally relative to the base (610).
  5. 5. The motor for a water purifier diaphragm booster pump of claim 4, wherein an elastic assembly (650) is further disposed between the sleeve (620) and the base (610), the elastic assembly (650) provides an axial supporting force to the sleeve (620), so that the sleeve (620) has an axial lifting space while the first fixed ratchet ring (641) is kept engaged with the first movable ratchet ring (642).
  6. 6. The motor for a water purifier diaphragm booster pump of claim 5, wherein the front end cover (410) is provided with an annular chute (411), the base (610) is slidably arranged in the annular chute (411), a locking bolt (660) is axially inserted into the sleeve (620), a screw of the locking bolt (660) penetrates through the base (610) and can be abutted to the bottom of the annular chute (411), and the base (610) can be pressed and fastened in the annular chute (411) by screwing the locking bolt (660).
  7. 7. The motor for a water purifier diaphragm booster pump of claim 6, wherein the ratchet limit structure (640) further comprises a second ratchet assembly, the second ratchet assembly comprises a second fixed ratchet ring (643) arranged on the base (610) and a second movable ratchet ring (644) arranged at the lower end of the sleeve (620) and matched with the second fixed ratchet ring (643), and the rotation stopping direction of the second fixed ratchet ring (643) and the rotation stopping direction of the second movable ratchet ring (644) are opposite to the rotation stopping direction of the first fixed ratchet ring (641) and the first movable ratchet ring (642); The second movable ratchet ring (644) is separated under the support of an elastic component (650), and when the locking bolt (660) is screwed to enable the sleeve (620) to move downwards to a locking position against the supporting force of the elastic component (650), the second movable ratchet ring (644) and the second fixed ratchet ring (643) are in an engaged state.
  8. 8. The motor for a water purifier diaphragm booster pump according to any one of claims 2 to 7, wherein an annular constraint groove (631) is formed in a rim of the eccentric wheel (630), a guide pin (523) is fixedly provided on the adjustment plate (521), and an end portion of the guide pin (523) is inserted into the constraint groove (631).
  9. 9. The motor for a diaphragm booster pump of a water purifier according to claim 6 or 7, wherein an upper surface of the base (610) located in the annular chute (411) is a roughened surface (611).
  10. 10. An assembly calibration method for a motor for a diaphragm booster pump of a water purifier according to any one of claims 1 to 9, comprising the steps of: S100, mounting one end of a rotating shaft of the rotor part (200) in the first bearing (312); S200, preliminarily installing the floating bearing chamber mechanism (500) on the front end cover (410), and installing the other end of the rotating shaft in a second bearing (511) in the floating bearing chamber (510); S300, operating the adjusting driving piece (600) by taking the first bearing (312) as a reference, driving the adjusting arm (520) to radially move, thereby adjusting the central axis position of the floating bearing chamber (510) until the rotor part (200) rotates smoothly, and realizing coaxiality calibration of the second bearing (511) and the first bearing (312); S400, locking the floating bearing chamber mechanism (500) on the front end cover (410) after coaxiality calibration is completed.

Description

Motor for diaphragm booster pump of water purifier and assembling and calibrating method thereof Technical Field The invention relates to a motor, in particular to a motor for a diaphragm booster pump of a water purifier and an assembly calibration method thereof. Background In a motor for a water purifier diaphragm booster pump, a rotor is usually supported by two bearings provided on a rear end cover and a front end cover, respectively. The rear end cover is rigidly fixed at one end of the stator through bolts, and a first bearing on the rear end cover is used as an installation reference. The front end cover is fixed at the other end of the stator in the same way, and a second bearing is arranged. Theoretically, the first bearing of the rear end cap should be coaxial with the stator bore. However, machining tolerances of the parts, cooling shrinkage deformation of the plastic, and assembly errors accumulate. Due to the non-adjustable rigid connection between the rear end cap and the stator, these accumulated errors can lead to deviations of the actual axis of the first bearing from the ideal rotor axis. This deflection is transferred to the front end cap portion through the rigid rotor shaft. If the second bearing of the front end cover is also mounted with non-adjustable rigidity, the errors will be further superimposed, and the final total error of coaxiality may exceed the compensation capability of the bearing's own play. The rotor can run under the condition that the included angles of the rotating axes exist in the bearings at the two ends, abnormal vibration and noise are caused, the bearings bear uneven radial loads, abrasion is accelerated, and the running stability, the silencing effect and the service life of the motor are seriously affected. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a motor for a diaphragm booster pump of a water purifier and an assembly calibration method thereof. The motor introduces a floating bearing chamber mechanism capable of being calibrated on line at the front end cover part, can compensate assembly accumulated errors, ensures high coaxiality of bearings at two ends, and therefore realizes stable, mute and reliable operation. In order to achieve the above purpose, the invention adopts the following technical scheme: the motor for the diaphragm booster pump of the water purifier comprises a stator part, a rotor part, a rear end cover part and a front end cover part, wherein the rear end cover part comprises a rear end cover fixedly arranged at one end of the stator part, the rear end cover is provided with a fixed bearing chamber, and a first bearing is embedded in the rear end cover; The front end cover part comprises a front end cover fixedly arranged at the other end of the stator part, and a floating bearing chamber mechanism is arranged on the front end cover; The floating bearing chamber mechanism includes: A floating bearing chamber in which a second bearing is embedded; An adjusting arm having at least three radially extending arms connected to the outer periphery of the floating bearing chamber; the adjusting driving piece is arranged on the front end cover and connected with the adjusting arm, and is operated to drive the corresponding adjusting arm to drive the floating bearing chamber to move in a radial plane relative to the front end cover, so that the coaxiality of the second bearing and the first bearing is calibrated. In some embodiments, the adjusting driving part comprises a base rotatably mounted on the front end cover, and a sleeve rotatably arranged on the base, wherein an eccentric wheel is arranged at the upper end of the sleeve, the adjusting arm is an adjusting plate, an adjusting hole is formed in the outer side end of the adjusting plate, the rim of the eccentric wheel is in tangential contact with the inner edge of the adjusting hole corresponding to the adjusting plate, and the eccentric wheel is rotated to drive the adjusting plate to move radially. In some embodiments, a ratchet limit structure is provided between the base and the sleeve for limiting reverse rotation of the sleeve relative to the base in the adjustment direction. In some embodiments, the ratchet limiting structure comprises a first fixed ratchet ring arranged on the base and a first movable ratchet ring arranged at the lower end of the sleeve and meshed with the first fixed ratchet ring, and the first fixed ratchet ring is matched with the first movable ratchet ring to enable the sleeve to rotate unidirectionally relative to the base in a first direction. In some embodiments, an elastic component is further disposed between the sleeve and the base, and the elastic component provides an axial supporting force for the sleeve, so that the sleeve has an axial lifting space while the first fixed ratchet ring is in ring engagement with the first movable ratchet ring. In some embodiments, the front end cover is provided w