Motor housing of vehicle

Abstract

The present invention relates to a motor housing for a vehicle, comprising: a housing body having a space formed therein for inserting a motor; a flange portion provided on the housing body and having a tapping hole formed therein for mounting a motor cover; a PCB cover portion provided on the housing body and having a PCB board positioned therein; and a bearing portion provided on the housing body and rotatably supporting a motor shaft portion of a motor. The housing body is characterized by including a heat dissipation portion for dissipating heat generated from the motor and the PCB board, and a mold portion that accommodates the heat dissipation portion and is injection molded.

Description

Technology Field

[0001] The present invention relates to a motor housing for a vehicle, and more specifically, to a motor housing for a vehicle in which a molded housing can be applied using an insert. Background Technology

[0002] A motor is a mechanical device capable of generating rotational force from electrical energy, comprising a rotor and a stator. The rotor is configured to interact electromagnetically with the stator and can rotate due to the force acting between a magnetic field and the current flowing through a coil. The motor is constructed to include a motor housing that forms its external shape.

[0003] Generally, steel and aluminum are primarily used for motor housings. In the case of conventional motors connected to the ECU via wires, the simple shape of the motor housing necessitated its fabrication using a steel press method. Currently, power pack structures that directly connect the ECU and the motor without wires are widely adopted.

[0004] Considering the assembly with the ECU, the shape of the motor housing became more complex, which resulted in limitations in manufacturing using the existing press method. To overcome this, a die-casting method using aluminum was applied. However, due to the low dimensional precision of the mold, post-processing is required, and there is a problem of an increased number of machined parts.

[0005] Conventional press molding methods using steel are advantageous in terms of manufacturing costs, but they face difficulties in realizing complex shapes and are disadvantageous in terms of weight reduction and friction. While die casting methods using aluminum enable the realization of complex shapes and weight reduction, they present a disadvantage in terms of manufacturing costs due to the large number of processing parts. Therefore, there is a need to improve these aspects.

[0006] The background technology of the present invention is disclosed in Korean Published Patent Application No. 10-2015-0020753 (published on February 27, 2015; Title of Invention: Cooling and Oil Churning Rotor Structure of Induction Motor). The problem to be solved

[0007] The objective of the present invention, devised to solve the aforementioned problem, is to provide a motor housing for a vehicle that can apply a motor mold housing using a steel insert. means of solving the problem

[0008] The present invention, devised to achieve the above objective, comprises a motor housing for a vehicle, a housing body having a space formed therein for inserting a motor, a flange portion provided on the housing body having a tapping hole formed therein for mounting a motor cover, a PCB cover portion provided on the housing body having a PCB board positioned therein, and a bearing portion provided on the housing body to rotatably support a motor shaft portion of the motor, wherein the housing body comprises a heat dissipation portion for dissipating heat generated from the motor and the PCB board, and a mold portion that accommodates the heat dissipation portion and is injection molded.

[0009] The above heat dissipation part is characterized by including a metal material, and the above mold part is characterized by including a plastic material.

[0010] The heat dissipation unit is characterized by comprising a first heat dissipation unit disposed on the outer side of the PCB substrate, a second heat dissipation unit disposed on the outer side of the bearing unit and in contact with the first heat dissipation unit, which conducts heat from the housing body to the motor shaft unit, and a third heat dissipation unit disposed on the outer side of the motor to dissipate heat generated from the motor.

[0011] The first heat dissipation member is characterized by including a heat dissipation plate disposed on the outer upper side of the PCB substrate and a heat dissipation fin portion formed on the outer surface of the heat dissipation plate.

[0012] The second heat dissipation part is characterized by including a hollow heat dissipation body part that is open vertically and a protrusion formed to protrude from the heat dissipation body part toward the housing body side and in contact with the first heat dissipation part.

[0013] The third heat dissipation member is characterized by including a hollow heat dissipation body portion that is open vertically and a protrusion portion that is formed to protrude from the heat dissipation body portion toward the motor cover and contacts the motor cover.

[0014] The above PCB substrate is characterized by being heat-fused to the above mold portion.

[0015] The above housing body is characterized by including a connection hole portion formed in the mold portion and having a connection terminal connected to the motor exposed therein. Effects of the invention

[0016] In this invention, a metal heat dissipation part is formed by insert injection molding into a plastic mold part to form a motor housing, and since material loss is reduced compared to aluminum die casting and no separate process is required, it has the effect of reducing production costs.

[0017] In addition, the present invention has the effect of improving dimensional stability in the production of a motor housing and eliminating the need for post-processing. Brief explanation of the drawing

[0018] FIG. 1 is an upper perspective view showing a motor housing of a vehicle according to an embodiment of the present invention, FIG. 2 is a bottom perspective view showing a motor housing of a vehicle according to an embodiment of the present invention, FIG. 3 is a cross-sectional view showing a motor housing of a vehicle according to an embodiment of the present invention. FIG. 4 is a cross-sectional view showing the heat dissipation flow of a motor housing of a vehicle according to an embodiment of the present invention. Specific details for implementing the invention

[0019] Hereinafter, an embodiment of a motor housing of a vehicle according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the user or operator. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0021] FIG. 1 is an upper perspective view showing a motor housing of a vehicle according to an embodiment of the present invention, FIG. 2 is a lower perspective view showing a motor housing of a vehicle according to an embodiment of the present invention, FIG. 3 is a cross-sectional view showing a motor housing of a vehicle according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing the heat dissipation flow of a motor housing of a vehicle according to an embodiment of the present invention.

[0022] Referring to FIGS. 1 to 4, a motor housing of a vehicle according to a preferred embodiment of the present invention comprises components including a housing body (100), a flange portion (200), a PCB cover portion (300), and a bearing portion (400), which are described in detail as follows.

[0023] The housing body (100) is formed in a hollow shape, and a space is formed inside for inserting the motor (10). The housing body (100) can be formed in various shapes within the technical concept of being installed to surround the outer side of the stator of the motor (10).

[0024] The housing body (100) is formed in a cylindrical shape, and a plurality of flange portions (200) are formed spaced apart from each other along the upper edge of the housing body (100) facing the motor cover (20). Tapping holes (210) for mounting the motor cover (20) are formed in the flange portions (200).

[0025] A PCB cover portion (300) is formed on the outer side of the housing body (100). A PCB substrate (310) on which ECU components, etc. are mounted is provided on the inner side of the PCB cover portion (300). The PCB substrate (310) on which ECU components, etc. are mounted is not fastened to the housing body (100) by means of fastening members such as bolts, but is heat-fused to the bottom of the mold portion (120) of the housing body (100) by a heat-fusion method to reduce production costs.

[0026] The motor (10) is driven by power supplied through a wire member (not shown) connected to the housing body (100). The wire member comprises a power terminal through which power is input and output.

[0027] In the existing housing body (100), a power terminal cover is provided for insulating the power terminal that supplies power to the motor (10), but in the housing body (100) of the present invention, the power terminal cover is excluded to reduce production costs. A metal connection terminal (121) connected to the motor (10) is exposed through a connection hole (120a) formed on the bottom surface of the mold part (120).

[0028] A PCB board (310) on which an ECU component, etc. is mounted is connected to a connection terminal (121) exposed from the housing body (100), and a power terminal is connected to the housing body (100) in such a way that it is directly connected to the housing body (100).

[0029] The bearing portion (400) is provided in the inner lower part of the housing body (100). The bearing portion (400) rotatably supports the motor shaft portion (11) of the motor (10) mounted on the inner side of the housing body (100). The bearing portion (400) is made of a metal material such as steel.

[0030] The housing body (100) is configured to include a heat dissipation part (110) and a mold part (120).

[0031] The heat dissipation section (110) is made of a metal material such as copper, aluminum, or steel, which has an excellent heat transfer coefficient. The heat dissipation section (110) is equipped with a first heat dissipation section (111), a second heat dissipation section (112), and a third heat dissipation section (113).

[0032] The first heat dissipation unit (111) is for dissipating heat generated from ECU components, etc. mounted on the PCB board (310), and is positioned on the outside of the PCB board (310).

[0033] The first heat dissipation section (111) is configured to include a heat dissipation plate (111a) and a heat dissipation fin section (111b).

[0034] The heat sink (111a) is formed in the shape of a flat plate and is horizontally positioned on the outer upper side of the PCB substrate (310).

[0035] The heat dissipation fin portion (111b) is formed on the outer upper surface of the heat dissipation plate (111a). The heat dissipation fin portion (111b) is formed to protrude upward from the heat dissipation plate (111a) by a certain length. The heat dissipation fin portion (111b) can be welded to the heat dissipation plate (111a).

[0036] A pair of heat dissipation fins (111b) are spaced apart from each other to form a flow path between them, and can be formed in a wavy shape along the longitudinal direction of the heat dissipation plate (111a). In FIG. 4, the direction of heat transfer is indicated by an arrow.

[0037] The second heat dissipation part (112) is positioned on the outside of the bearing part (400). The second heat dissipation part (112) is configured to include a heat dissipation body part (112a) and a protrusion part (112b).

[0038] The heat dissipation body (112a) is formed in the shape of a hollow space that is open at the top and bottom. The heat dissipation body (112a) is formed in a cylindrical shape to surround the outer side of the bearing part (400).

[0039] The protrusion (112b) is formed to protrude from the lower part of the heat dissipation body (112a) toward the housing body (100). The outer surface of the protrusion (112b) and the outer surface of the first heat dissipation part (111) are in contact with each other. At this time, the protrusion (112b) of the second heat dissipation part (112) and the first heat dissipation part (111) can be welded together.

[0040] The second heat dissipation unit (112) conducts heat from the housing body (100) to the motor shaft unit (11). Additionally, heat from the first heat dissipation unit (111) is conducted to the second heat dissipation unit (112) and then conducted to the motor shaft unit (11). The heat conducted to the motor shaft unit (11) is cooled by the rotation of the motor shaft unit (11). In FIG. 4, the direction of heat transfer is indicated by an arrow.

[0041] The third heat dissipation part (113) is positioned on the outside of the motor (10) to dissipate heat generated from the motor (10). The third heat dissipation part (113) is positioned spaced apart from the second heat dissipation part (112). The diameter of the third heat dissipation part (113) is formed to be larger than the diameter of the second heat dissipation part (112).

[0042] The third heat dissipation part (113) is configured to include a heat dissipation body part (113a) and a protrusion part (113b).

[0043] The heat dissipation body (113a) is formed in the shape of a hollow structure that is open at the top and bottom. The heat dissipation body (113a) is formed in a cylindrical shape to surround the outside of the motor (10).

[0044] Heat generated from the motor (10) is transferred to the heat dissipation body (113a) of the third heat dissipation unit (113), and the heat transferred to the heat dissipation body (113a) is dissipated to the outside through the outer surface of the housing body (100) or is dissipated through conduction to an external structure through the motor cover (20) in contact with the third heat dissipation unit (113). In FIG. 4, the direction of heat transfer is indicated by an arrow.

[0045] The protrusion (113b) is formed to protrude from the heat dissipation body (113a) toward the motor cover (20) and comes into contact with the motor cover (20). Heat generated from the motor (10) is conducted to the motor cover (20) through the protrusion (113b) of the third heat dissipation part (113) that comes into contact with the motor cover (20) and is dissipated. In FIG. 4, the direction of heat transfer is indicated by an arrow.

[0046] The mold portion (120) accommodates the heat dissipation portion (110) and is insert injection molded. The mold portion (120) accommodates the first heat dissipation portion (111), the second heat dissipation portion (112), and the third heat dissipation portion (113) and is injection molded to become an integrated unit. The mold portion (120) is made of a plastic material. A flange portion (200) with a tapping hole (210) formed therein may be formed on the edge of the mold portion (120). Additionally, a PCB cover portion (300) may be formed on the mold portion (120).

[0047] Since a metal heat dissipation part (110) is injection-molded into a plastic mold part (120) to form a housing body (100), the loss of material is reduced, and since no separate process is required, the production cost can be reduced.

[0048] Since the mold part (120) is molded using plastic as a raw material, the weight of the motor housing can be reduced. In addition, since the mold part (120) uses plastic, which is cheaper than aluminum, as a material, production costs can be reduced.

[0049] In the motor housing of a vehicle according to an embodiment of the present invention, a heat dissipation part (110) made of metal material is formed by insert injection molding into a mold part (120) made of plastic material to form a housing body (100), so the loss of material compared to aluminum casting (die casting) is reduced and no separate process is required, thereby reducing the production cost.

[0050] In addition, the motor housing of a vehicle according to an embodiment of the present invention has improved dimensional stability in the production of the housing body (100) and does not require post-processing.

[0052] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the claims below. Explanation of the symbols

[0053] 10: Motor 11: Motor shaft 20: Main housing 100: Housing body 110: Heat dissipation section 111: First heat dissipation section 111a: Heat sink 111b: Heat fin section 112: Second heat dissipation section 112a, 113a: Heat dissipation body section 112b, 113b: Protrusions 113: Third heat dissipation part 120: Mold part 120a: Connection hole part 121: Connection terminal 200: Flange section 210: Tapping hole 300: PCB cover 310: PCB board 400: Bearing part

Claims

Claim 1 A motor housing of a vehicle, comprising: a housing body having a space formed therein for inserting a motor; a flange portion provided on the housing body and having a tapping hole formed therein for mounting a motor cover; a PCB cover portion provided on the housing body and having a PCB board positioned therein; and a bearing portion provided on the housing body and rotatably supporting a motor shaft portion of the motor; wherein the housing body comprises: a heat dissipation portion for dissipating heat generated from the motor and the PCB board; and a mold portion that accommodates the heat dissipation portion and is injection molded; wherein the heat dissipation portion comprises: a first heat dissipation portion disposed on the outside of the PCB board; a second heat dissipation portion disposed on the outside of the bearing portion and in contact with the first heat dissipation portion, and conducting heat from the housing body to the motor shaft portion; and a third heat dissipation portion disposed on the outside of the motor to dissipate heat generated from the motor. Claim 2 A motor housing of a vehicle according to claim 1, characterized in that the heat dissipation portion comprises a metal material and the mold portion comprises a plastic material. Claim 3 delete Claim 4 A motor housing of a vehicle according to claim 1, wherein the first heat dissipation part comprises: a heat dissipation plate disposed on the outer upper side of the PCB substrate; and a heat dissipation fin part formed on the outer surface of the heat dissipation plate. Claim 5 A motor housing of a vehicle according to claim 1, wherein the second heat dissipation part comprises: a hollow heat dissipation body part that is open vertically; and a protrusion formed to protrude from the heat dissipation body part toward the housing body side and in contact with the first heat dissipation part. Claim 6 A motor housing of a vehicle according to claim 1, wherein the third heat dissipation part comprises: a hollow heat dissipation body part that is open vertically; and a protrusion formed to protrude from the heat dissipation body part toward the motor cover side and contacting the motor cover. Claim 7 A motor housing of a vehicle according to claim 1, characterized in that the PCB substrate is heat-fused to the mold portion. Claim 8 A motor housing of a vehicle according to claim 1, wherein the housing body includes a connection hole portion formed in the mold portion and having a connection terminal connected to the motor exposed therein.

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