Fluid pump with a motor housing and method for producing a motor housing
AssigneeRobert Bosch GmbH
InventorsGerd Lentz, Christoph Heier, Juergen Bassler
Life of this patent
Estimating the term…
Abstract
A fluid pump, in particular for the cooling or heating circuit of a motor vehicle, has a claw pole stator and a rotor that is separated from the claw pole stator by a tube, is immersed in a fluid, and has a vane wheel. Claws (25) of the claw pole stator (21) are an integral component of the tube (11), which is part of a motor housing (2), and the number of mounting steps is thus reduced.
Claims20
A fluid pump (1) comprising a motor housing (2), a claw pole stator (21), and an inner rotor (6) that is separated from the claw pole stator (21) by a tube (11) and is immersed into the fluid to be pumped, and at least one vane wheel,
- said motor housing (2) being of plastic, and
- said claw pole stator (21) having claw baffles (26), wherein at least part of the claw pole stator (21) is retained in the motor housing (2) by injection molding.
A fluid pump (1) comprising a motor housing (2), a claw pole stator (21), and an inner rotor (6) that is separated from the claw pole stator (21) by a tube (11) and is immersed into the fluid to be pumped, and at least one vane wheel,
- said motor housing (2) being of plastic, and
- said claw pole stator (21) having claw baffles (26), wherein at least part of the claw pole stator (21) is retained in the motor housing (2) by injection molding;
- wherein the claw pole stator (21) includes a winding (55) and claws (25), and
- the claws (25) extend to the vicinity of an inner wall (24) of the tube (11), so that heat from the winding (55) and claws (25) can be dissipated to the fluid flowing in the tube (11).
A fluid pump (1) comprising a motor housing (2), a claw pole stator (21), and an inner rotor (6) that is separated from the claw pole stator (21) by a tube (11) and is immersed into the fluid to be pumped, and at least one vane wheel,
- said motor housing (2) being of plastic, and
- said claw pole stator (21) having claw baffles (26), wherein at least part of the claw pole stator (21) is retained in the motor housing (2) by injection molding;
- wherein further
- the claw baffles (26) are retained at least partly in the motor housing (2) by injection molding;
- wherein
- the claw pole stator (21) includes a winding (55) and claws (25), and
- the claws (25) extend to the vicinity of an inner wall (24) of the tube (11), so that heat from the winding (55) and claws (25) can be dissipated to the fluid flowing in the tube (11).
A fluid pump (1) comprising a motor housing (2), a claw pole stator (21), and an inner rotor (6) that is separated from the claw pole stator (21) by a tube (11) and is immersed into the fluid to be pumped, and at least one vane wheel,
- said motor housing (2) being of plastic, and
- said claw pole stator (21) having claw baffles (26), wherein at least part of the claw pole stator (21) is retained in the motor housing (2) by injection molding;
- a pump housing (33) of the fluid pump (1) comprises a rear housing part (3), and
- metal connecting parts (44) are retained in the motor housing (2) or the rear housing part (3) by injection molding so as to make an electrical connection between an interior and an exterior of the motor housing (2);
- wherein
- the claw pole stator (21) includes a winding (55) and claws (25), and
- the claws (25) extend to the vicinity of an inner wall (24) of the tube (11), so that heat from the winding (55) and claws (25) can be dissipated to the fluid flowing in the tube (11).
A fluid pump (1) comprising a motor housing (2), a claw pole stator (21), and an inner rotor (6) that is separated from the claw pole stator (21) by a tube (11) and is immersed into the fluid to be pumped, and at least one vane wheel,
- said motor housing (2) being of plastic, and
- said claw pole stator (21) having claw baffles (26), wherein at least part of the claw pole stator (21) is retained in the motor housing (2) by injection molding;
- a pump housing (33) of the fluid pump (1) comprises a rear housing part (3), and
- metal connecting parts (44) are retained in the motor housing (2) or the rear housing part (3) by injection molding so as to make an electrical connection between an interior and an exterior of the motor housing (2);
- the fluid pump (1) further comprises at least (1) printed circuit board (38) for mounting electronic components for a controller, and
- at least one stamped grid (47) for an electrical connection from and to the at least one printed circuit board (38) is retained in the motor housing (2) or into the rear housing part (3) by injection molding;
- wherein
- the claw pole stator (21) includes a winding (55) and claws (25), and
- the claws (25) extend to the vicinity of an inner wall (24) of the tube (11), so that heat from the winding (55) and claws (25) can be dissipated to the fluid flowing in the tube (11).
A method for producing a motor housing (2) for a fluid pump (1) wherein the fluid pump (1) has a claw pole stator (21) and an inner rotor (6), separated from the claw pole stator (21) by a tube (11) and immersed in the fluid and having a vane wheel,
- the method comprising the steps of:
- injection molding said motor housing primarily from plastic material so that the motor housing (2) includes claw baffles (26) that have claws (25), metal connecting parts (44), and at least one stamped grid (47) integrally joined with the plastic motor housing (2),
- then winding a winding (55) onto the motor housing (2) in the region of the claws (25),
- and then mounting a short-circuit ring (58) over the winding (55).
A method for producing a motor housing (2) for a fluid pump (1) wherein the fluid pump (1) has a claw pole stator (21) and an inner rotor (6), separated from the claw pole stator (21) by a tube (11) and immersed in the fluid and having a vane wheel,
- the method comprising the steps of:
- injection molding said motor housing primarily from plastic material, so that the motor housing (2) includes claw baffles (26) that have claws (25), metal connecting parts (44), and at least one stamped grid (47) integrally joined with the plastic motor housing (2),
- then placing a winding (55) in the motor housing (2) in the region of the claws (25),
- and then mounting a short-circuit ring (58) over the winding (55).
Dependencies are inferred from the claim text.