Spherical pump and motor assembly
View Patent ↗A spherical pump and motor assembly, including a spherical pump with a rotary disc shaft and an outer rotor motor. The outer rotor motor includes an outer rotor and a stator. The outer rotor has a rotor main body, which is cylindrical and upward-opening. A magnetic ring is arranged on an inner periphery of the rotor main body. A rotor central shaft is provided at a bottom center of the rotor main body. The stator includes a bracket with a central shaft hole. Multiple coil windings are arranged on an outer periphery of the bracket. An upper end of the bracket is configured to protrude out of upper ends of the coil windings to form a connection portion fixedly connected to a cylinder body seat. A lower end of the rotary disc shaft is engaged with an upper end of the rotor central shaft for torque transmission.
1 . A spherical pump and motor assembly, comprising:
a spherical pump; and
an outer rotor motor;
wherein the spherical pump is provided with a rotary disc shaft; a cylinder body seat is provided at a lower portion of the spherical pump;
the cylinder body seat is provided with a center hole, and the center hole is configured as a rotational support for the rotary disc shaft;
the outer rotor motor comprises an outer rotor; the outer rotor comprises a rotor main body, which is cylindrical and upward-opening; a magnetic ring is arranged on an inner periphery of the rotor main body; and a rotor central shaft is provided at a center of a bottom surface of the rotor main body;
the outer rotor motor further comprises a stator; the stator comprises a stator bracket with a central shaft hole; and a plurality of stator teeth are arranged on an outer periphery of the stator bracket, and a plurality of coil windings are arranged on the plurality of stator teeth, respectively;
the rotor central shaft is fitted into the central shaft hole of the stator bracket to form a rotational pair;
the stator bracket and the plurality of coil windings are provided in an annular space between the rotor central shaft and the magnetic ring;
an upper end of the stator bracket is configured to protrude out of upper ends of the plurality of coil windings to form a connection portion;
the cylinder body seat is fixedly connected to the connection portion;
the rotary disc shaft is configured to be coaxial with the rotor central shaft;
a lower end of the rotary disc shaft is engaged with an upper end of the rotor central shaft for torque transmission;
the spherical pump comprises a cylinder body and a cylinder cover;
the cylinder body is fixedly connected to the cylinder cover by ultrasonic welding, screw connection, adhesive bonding or a clamp to form a spherical cavity;
the clamp is made of a metal or a heat-shrinkable plastic;
the outer rotor motor comprises a protection casing; an upper end of the protection casing is provided with an opening; and the opening is sealedly and fixedly connected to an outer periphery of the connection portion;
the protection casing is cylindrical;
a positioning ring is provided between an inner periphery of the opening of the protection casing and the outer periphery of the connection portion;
the positioning ring is sealedly and fixedly connected to the inner periphery of the protection casing and the outer periphery of the connection portion, respectively; and
an upper end of the positioning ring is configured to fit a lower end of the cylinder body in shape.
2 . The spherical pump and motor assembly according to claim 1 , wherein the connection portion is configured as a cylindrical groove opening upward;
an outer periphery of the cylinder body seat is configured to fit an inner periphery of the connection portion; and
the cylinder body seat is provided in the connection portion to form an interference fit, such that the spherical pump is fixedly connected to the stator bracket.
3 . The spherical pump and motor assembly according to claim 1 , wherein a bushing is provided at a mating portion between the central shaft hole of the stator bracket and the rotor central shaft; and the bushing is configured as a rotational support for the rotor central shaft.
4 . The spherical pump and motor assembly according to claim 3 , wherein the bushing comprises an upper section and a lower section; an inner diameter of the bushing is smaller than a diameter of the central shaft hole of the stator bracket; the bushing is configured to be pre-embedded in the central shaft hole of the stator bracket; and the bushing is made of copper or other wear-resistant materials.
5 . The spherical pump and motor assembly according to claim 1 , wherein the lower end of the rotary disc shaft is provided with a first semi-cylindrical shaft head; the upper end of the rotor central shaft is provided with a second semi-cylindrical shaft head fitting the first semi-cylindrical shaft head; and the lower end of the rotary disc shaft is rotatably connected to the upper end of the rotor central shaft through engagement between the first semi-cylindrical shaft head and the second semi-cylindrical shaft head.
6 . The spherical pump and motor assembly according to claim 5 , wherein an outer periphery of an engagement portion between the rotary disc shaft and the rotor central shaft is provided with a sleeve in a cylindrical shape; and
the sleeve is fixedly sleeved on an outer periphery of the first semi-cylindrical shaft head, or fixedly sleeved on an outer periphery of the second semi-cylindrical shaft head.
7 . The spherical pump and motor assembly according to claim 1 , wherein the lower end of the rotary disc shaft is configured as a first cylindrical shaft head; the upper end of the rotor central shaft is configured as a second cylindrical shaft head; and a sleeve is provided on an outer periphery of an engagement portion between the lower end of the rotary disc shaft and the upper end of the rotor central shaft;
the sleeve is configured to be held on the first cylindrical shaft head and the second cylindrical shaft head through an interference fit; and
the lower end of the rotary disc shaft is in rotatable fit with the upper end of the rotor central shaft through the sleeve.