CN-116420021-B - Electric pump

Abstract

The invention provides an electric pump including a housing, a gear portion provided in the housing, a stator provided to correspond to the gear portion, and a support member provided between the gear portion and the housing, wherein the gear portion includes a first gear, a second gear provided to correspond to the first gear, and a magnet provided in the second gear, and the support member includes a first region supporting the first gear and a second region protruding from the first region and inserted into the first gear.

Inventors

• Hong Xunji

Assignees

• LG伊诺特有限公司

Dates

Publication Date

20260505

Application Date

20211006

Priority Date

20201006

Claims (8)

1. 1. An electric pump, comprising: Molding a member; a gear portion provided in the molding member; A stator provided to correspond to the gear portion, and A support member provided between the gear portion and the molding member, Wherein the gear portion includes a first gear, a second gear disposed to correspond to the first gear, and a magnet disposed on the second gear, and The support member includes a first region supporting the first gear and a second region protruding from the first region and inserted into the first gear, wherein the first region and the second region are integrally formed, Wherein the first region is positioned between the first gear and the molding member in an axial direction, and the first region is in contact with both the first gear and the molding member.
2. 2. The electric pump of claim 1, wherein the second region passes through the first gear.
3. 3. The electric pump according to claim 1, further comprising a cover disposed over the gear portion, and Wherein the second region passes through the gear portion in an axial direction and is coupled to the cover.
4. 4. The electric pump of claim 3, wherein the molded member is coupled to the cover.
5. 5. The electric pump of claim 4, wherein the molded member comprises: A lower surface supporting the gear portion and the support member, and A sidewall extending upwardly from the lower surface.
6. 6. The electric pump of claim 1, wherein the stator is embedded in the molded member.
7. 7. The electric pump of claim 1, wherein: The molding member includes a receiving portion in which the gear portion is disposed, and An upper surface of the molding member is disposed at a level higher than an upper end portion of the stator.
8. 8. The electric pump according to claim 7, further comprising a cover disposed over the gear portion, Wherein at least a portion of the cover is disposed in the receiving portion.

Description

Electric pump Technical Field The present invention relates to an electric pump. Background An Electric Oil Pump (EOP) is used to discharge fluid at a predetermined pressure. Such an oil pump includes a housing, a gear portion provided in the housing, and a motor driving the gear portion. However, the conventional electric oil pump has a problem in that the gear portion and the motor portion are mechanically separated, and thus the length in the axial direction increases. In addition, since the housing is formed of a plastic material, thermal deformation may occur due to heat generated from the gear portion during operation. Therefore, there is a problem in that the efficiency of the electric oil pump is lowered because there is a gap between the housing and the gear portion or an error occurs between the axial centers of the plurality of gears included in the gear portion. Disclosure of Invention Technical problem The present invention aims to provide an oil pump in which a housing is miniaturized, a gap of a gear portion in an axial direction due to thermal deformation of the housing is prevented, and the gear portion is stably driven. Technical solution An aspect of the present invention provides an electric pump including a housing, a gear portion provided in the housing, a stator provided to correspond to the gear portion, and a support member provided between the gear portion and the housing, wherein the gear portion includes a first gear, a second gear provided to correspond to the first gear, and a magnet provided on the second gear, and the support member includes a first region supporting the first gear and a second region protruding from the first region and inserted into the first gear. The second region may pass through the first gear. Another aspect of the present invention provides an electric pump including a housing, a gear portion disposed in the housing, a stator disposed to correspond to the gear portion, a cover disposed above the gear portion, and a support member disposed below the gear portion, wherein the support member includes a second region passing through the gear portion in an axial direction and coupled to the cover. The housing may be coupled to the cover. The housing may include a lower surface supporting the gear portion and the support member and a sidewall extending upwardly from the lower surface. Still another aspect of the present invention provides an electric pump including a molding member, a gear portion provided in the molding member, a stator provided to correspond to the gear portion, and a support member provided between the gear portion and the molding member and formed of a metal material, wherein the gear portion includes a first gear, a second gear provided to correspond to the first gear, and a magnet provided on the second gear, and at least a portion of the support member is provided between a lower surface of the gear portion and one surface of the molding member. The stator may be embedded in the molded member. The molding member may include a receiving portion in which the gear portion is disposed, and an upper surface of the molding member may be disposed at a higher level than an upper end portion of the stator. The electric pump may include a cover disposed above the gear portion, wherein at least a portion of the cover may be disposed in the receiving portion. Still another aspect of the present invention provides an electric pump including a housing, a gear portion provided in the housing, a driving portion driving the gear portion, and a supporting member provided between the gear portion and the housing, wherein the gear portion includes a first gear and a second gear rotating corresponding to the first gear, the driving portion includes a magnet provided on the second gear and a coil provided to correspond to the magnet, and the supporting member includes a first region coupled to the housing and a second region fixed to the first gear. The housing may include a receiving portion in which the gear portion is disposed. The support member may comprise aluminium. One region of the support member may pass through the gear portion in the axial direction, and the other region may support the gear portion in the axial direction. The upper end portion of the support member may be disposed at a level higher than the upper surface of the gear portion. The maximum diameter of the support member may be greater than or equal to the outer diameter of the gear portion. A through hole may be formed in the gear portion, the support member is disposed in the through hole, and a protruding portion protruding toward the axial center may be formed in an inner peripheral surface in which the through hole is formed. The support member may include a side surface facing an inner peripheral surface of the gear portion in the radial direction, and a portion of the side surface of the support member may be in contact with the protruding portion and another portion may b