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US 10,294,951 B2Granted
Shaft sleeve having a bearing and a resilient member formed with protrusions and grooves
AssigneeJohnson Electric International AG
InventorsMin Li, Zhi Ping Fu, Moola Mallikarjuna Reddy, Kok Ang Chong
Life of this patent
Estimating the term…
Abstract
A liquid pump includes a motor and an impeller. The motor includes a stator, a rotor, a base body and a shaft sleeve unit supporting the rotor for rotation. The shaft sleeve unit includes a fixing member fixed in the base body, a bearing received in the fixing member and surrounding the rotary shaft, and a resilient buffering member disposed between the fixing member and the bearing. The impeller is coupled to the rotor.
Claims16
A shaft sleeve unit comprising:
- a fixing member,
- a bearing received in the fixing member, and
- a resilient buffering member disposed between the fixing member and the bearing;
- wherein a first groove-protrusion structure is formed between a radial inner surface of the fixing member and a radial outer surface of the resilient buffering member, a second groove-protrusion structure is formed between a radial outer surface of the bearing and a radial inner surface of the resilient buffering member, a radial thickness of the resilient buffering member between the first groove-protrusion structure and the second groove-protrusion structure is not greater than a radial distance between the radial outer surface of the bearing and the radial inner surface of the fixing member;
- wherein the first groove-protrusion structure comprises the radial outer surface of the buffering member recessed inwardly to form an annular groove and the radial inner surface of the fixing member projecting outwardly to form an annular protrusion, the annular protrusion of the fixing member is engaged in the annular groove of the buffering member;
- wherein second groove-protrusion structure comprises the radial outer surface of the bearing projecting outwardly to form an annular protrusion and the radial inner surface of the buffering member recessed inwardly to form an annular groove, the annular protrusion of the bearing is engaged in the annular groove of the buffering member;
- wherein the annular groove of the radial inner surface of the buffering member and the annular groove of the radial outer surface of the buffering member correspond to each other in position.
4 more elements
A motor comprising
- a stator;
- a rotor comprising a rotary shaft having an output end;
- a base body;
- and
- a shaft sleeve unit received in the base body and supporting the rotor for rotation, the shaft sleeve unit comprising a fixing member fixed in the base body, a bearing received in the fixing member and surrounding the rotary shaft, and a resilient buffering member disposed between the fixing member and the bearing;
- and
- wherein the buffering member comprises an inner surface and an outer surface opposite to the inner surface, an annular groove is formed on the inner surface of the buffering member, an outer surface of the bearing is formed with an annular protrusion, the annular protrusion is engaged in the annular groove to connect the bearing with the buffering member, a groove-protrusion structure is formed between the fixing member and the outer surface of the buffering member, the annular groove of the buffering member and the groove-protrusion structure correspond to each other in position, a radial thickness along a radial spacing between the annular groove of the buffering member and the outer surface of the buffering member is less than a radial thickness of the buffering member at the remaining area.
4 more elements
A liquid pump comprising:
- a motor comprising:
- a stator;
- a rotor comprising a rotary shaft having an output end;
- a base body;
- and
- a shaft sleeve unit received in the base body and supporting the rotor for rotation, the shaft sleeve unit comprising a fixing member fixed in the base body, a bearing received in the fixing member and surrounding the rotary shaft, and a resilient buffering member disposed between the fixing member and the bearing;
- and
- an impeller coupled to the output end of the rotor;
- wherein an outer surface of the buffering member projects outwardly to form an annular protrusion, an inner surface of the buffering member is recessed inwardly to form an annular groove, an outer surface of the bearing projects outwardly to form an annular protrusion, an inner surface of the fixing member is recessed inwardly to form an annular groove, the annular protrusion of the bearing is engaged in the annular groove of the buffering member, and the annular protrusion of the buffering member is engaged in the annular groove of the fixing member, the annular protrusion and annular groove of the buffering member correspond to each other in position, a radial thickness along a radial spacing between the annular groove of the buffering member and the annular protrusion of the buffering member is less than a radial thickness of the buffering member at the remaining area.
6 more elements
Dependencies are inferred from the claim text.