CN-122026641-A - Motor with a motor housing

Abstract

The motor includes a rotor, a first stator and a second stator disposed with the rotor interposed therebetween in an axial direction, a first bus bar connected to the first stator, a second bus bar connected to the second stator, a first connector portion fixed to the first bus bar, a second connector portion fixed to the second bus bar, a housing, a first cable connected to the first connector portion, and a second cable connected to the second connector portion. The housing is provided with a first hole portion extending from the first connector portion toward one side in the axial direction, and a second hole portion extending from the second connector portion toward one side in the axial direction. The first cable is connected to the first connector portion from the axial side through the first hole portion. The second cable is connected to the second connector portion from the axial side through the second hole portion.

Inventors

• Jian Weiqian

Assignees

• 尼得科株式会社

Dates

Publication Date

20260512

Application Date

20251105

Priority Date

20241112

Claims (8)

1. 1. A motor is provided with: A rotor rotatable about a central axis; a first stator axially opposed to the rotor and located on one axial side of the rotor; a second stator axially opposed to the rotor and located on the other axial side of the rotor; a first bus bar connected to the first stator; a second bus bar connected to the second stator; a first connector portion fixed to the first bus bar; A second connector portion fixed to the second bus bar; A housing accommodating the rotor, the first stator, the second stator, the first bus bar, and the second bus bar; A first cable connected to the first connector part and led out of the housing, and A second cable connected to the second connector portion and led out to the outside of the housing; The shell is provided with: a first hole portion extending from the first connector portion toward one axial side, and A second hole portion extending from the second connector portion toward one axial side; the first cable is connected to the first connector portion from one axial side through the first hole portion, The second cable is connected to the second connector portion from one axial side through the second hole portion, The second connector portion is located radially outward of the second stator, The second hole portion passes from the second connector portion to the axial side of the housing through the radial outer sides of the second stator and the first stator.
2. 2. The motor according to claim 1, wherein, The motor includes a cable cover surrounding at least one of the first cable and the second cable from a radial outside with respect to an axis extending in an axial direction, The cable cover has: A base member fixed to the housing; A cap member fixed to the base member, and An annular first sealing member; The base member has a cylindrical threaded portion surrounding the cable from a radially outer side of the axis, an external threaded portion is provided on an outer peripheral surface, The cap member has: a nut portion into which the male screw portion is inserted; A holding cylinder part which is cylindrical and surrounds the axis and extends from the nut part to one side in the axial direction, and An annular inner protruding portion protruding radially inward of the axis from an end portion of the holding cylinder portion on one axial side thereof, and The first seal member is sandwiched radially inward of the holding cylinder portion and between the cylindrical threaded portion and the inner protruding portion.
3. 3. The motor according to claim 2, wherein, The base member has a flange portion protruding radially outward from an end portion of the cylindrical threaded portion on the other axial side, A second sealing member is interposed between the flange portion and a surface of the housing facing one side in the axial direction.
4. 4. The motor according to claim 1, wherein, At least one of the first bus bar and the second bus bar has a plate-shaped connecting end portion in the thickness direction in the axial direction, A through hole is arranged at the connecting end part, The connector portion of at least one of the first connector portion or the second connector portion includes: a cylindrical portion inserted into the through hole, and A flange portion protruding radially outward from an axial end of the cylindrical portion; the cylindrical portion has: An internal thread part provided on the inner peripheral surface, and A pressure-bonding part which bulges radially outwards and clamps the connecting end part between the pressure-bonding part and the flange part, and At a head end portion of at least one of the first cable and the second cable, a screw-shaped terminal is provided to be screwed into the female screw portion.
5. 5. The motor according to claim 4, wherein, A conductive tape or a conductive paste is interposed between the female screw portion and the terminal.
6. 6. The motor according to claim 4, wherein the motor is provided with: A plurality of bus bars through which currents having different phases flow; A plurality of connector portions fixed to different bus bars, respectively; A plurality of cables connected to the different connector portions, respectively, and And an insulator having wall portions located between the connection end portions of the bus bars different from each other.
7. 7. The motor according to claim 1, wherein the motor is provided with: A shaft fixed to the rotor and extending in an axial direction with the central axis as a center; a bearing which is located at the other side of the axial direction of the rotor and supports the shaft to be rotatable, and And a bearing housing fixed to the shaft and extending radially outward from the shaft, the bearing housing covering the bearing from the other side in the axial direction.
8. 8. The motor according to claim 7, wherein, The housing has a cylindrical bearing holder portion for holding the bearing, A ring-shaped groove part extending along the circumferential direction is arranged on the surface of the bearing retainer part facing the other axial side, The bearing housing has: A plate-like cover body portion having an axial direction as a thickness direction; an annular convex portion protruding axially toward one side with respect to the cover main body portion and inserted into the groove portion, and And a cylindrical portion protruding radially outward of the annular projection toward one side in the axial direction with respect to the cover body portion, and surrounding an outer peripheral surface of the bearing holder portion from the radially outward side.

Description

Motor with a motor housing Technical Field The present invention relates to a motor. Background In recent years, development of motors for driving propellers of aircrafts such as electric vertical take-off and landing machines has been advanced (for example, patent document 1). Such a motor is disposed directly below the propeller. Therefore, in order not to obstruct the air blowing by the propeller, the projected area in the axial direction of the motor is required to be small. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2013-512149 Disclosure of Invention Problems to be solved by the invention A cable connected to a control unit may be connected to a motor of such an aircraft. In this case, the cable or the connection portion thereof may protrude from the outer shape of the motor, thereby blocking the air blowing by the propeller. The present invention has been made in view of the above-described problems, and an object thereof is to provide a motor in which miniaturization of a connector portion to which a power cable is connected is achieved. Solution for solving the problem The motor according to one embodiment of the present invention includes a rotor rotatable about a central axis, a first stator axially opposed to the rotor and located on one axial side of the rotor, a second stator axially opposed to the rotor and located on the other axial side of the rotor, a first bus bar connected to the first stator, a second bus bar connected to the second stator, a first connector portion fixed to the first bus bar, a second connector portion fixed to the second bus bar, a housing accommodating the rotor, the first stator, the second stator, the first bus bar, and the second bus bar, a first cable connected to the first connector portion and led out of the housing, and a second cable connected to the second connector portion and led out of the housing. The housing is provided with a first hole portion extending from the first connector portion toward one axial side, and a second hole portion extending from the second connector portion toward one axial side. The first cable is connected to the first connector portion from one side in the axial direction through the first hole portion. The second cable is connected to the second connector portion from one side from the axis through the second hole portion. The second connector portion is located radially outward of the second stator. The second hole portion passes from the second connector portion to the axial side of the housing through the radial outer sides of the second stator and the first stator. Effects of the invention According to an aspect of the present invention, a motor in which miniaturization of a connector portion to which a power cable is connected is achieved can be provided. Drawings Fig. 1 is a cross-sectional view of a motor of one embodiment. Fig. 2 is a perspective view of a bus bar unit and an insulator of one embodiment. Fig. 3 is an enlarged view of the region III shown in fig. 1. Fig. 4 is an enlarged view of the region IV shown in fig. 1. Fig. 5 is a cross-sectional view showing a plurality of first bus bars, a plurality of first connector portions, and a plurality of connection portions of first cables according to an embodiment. Detailed Description Hereinafter, a motor according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and may be arbitrarily changed within the scope of the technical idea of the present invention. In each figure, the Z-axis is appropriately illustrated. The Z axis is a virtual axis parallel to a central axis J described later. The Z axis is a vertical direction in which the positive side is "upper side" and the negative side is "lower side". However, the posture of the motor in the up-down direction in the present specification is an example for explanation, and the posture of the motor in use is not limited. Fig. 1 is a cross-sectional view of a motor 100 of one embodiment. The motor 100 of the present embodiment is a motor provided in the propulsion device 1000. The propulsion device 1000 is mounted on an aircraft, for example. Propulsion device 1000 generates propulsion for moving the aircraft. The propulsion device 1000 includes a motor 100 and a propeller 1100. The propeller 1100 is mounted on the shaft 8 of the motor 100, and is rotated about the central axis J by the motor 100. The propeller 1100 has a base 1110 fixed to the shaft 8 and a plurality of blade portions 1120 connected to the base 1110. The plurality of vane portions 1120 extend in the radial direction and are arranged at intervals in the circumferential direction. The motor 100 of the present embodiment includes a shaft 8, a pair of bearings 9A and 9B, a rotor 10, a pair of stators 20, a pair of bus bar units 30, a plurality of connector portions 40, a pair of i