BRUSHLESS DC MOTOR WITH BUILT-IN INVERTER

Abstract

BLDC motor with built-in inverter (1000), comprising: an inverter case (200) having one side coupled to a motor (100), an inner side being hollow and the other side being open, provided with an opening portion (240) by means of which a portion of an edge wall (310) is open, and further comprising a PCB substrate (210) provided in the hollow portion; a cover (300) connected to an open bottom of the inverter housing (200) to seal a surface contacting the inverter housing (200); a terminal block (400) arranged in a space formed by the opening portion (240) of the inverter case (200) and the cover (300) and provided with an electric wire through-hole (440) in a width direction so that an electric wire (500) is inserted to penetrate through the electric wire through-hole (440); an electrical wire side terminal (510) connected to one end (501) of the electrical wire (500) penetrating through the terminal block (400); and a sealing portion (600) configured to be connected to the terminal block (400) and the end (501) of the electric wire (500) to enclose both surfaces in a longitudinal direction and both surfaces in a height direction of the terminal block (400) and to be connected to an inner side surface in the width direction of the terminal block (400) from which the end (501) of the electric wire (500) is pulled out, wherein the sealing portion (600) is formed to seal between a circumference in the height direction and the length direction of the terminal block (400) and an inner side surface of the inverter case (200) and the cover (300) and to seal between the electric wire (500) coupled by penetrating through the electric wire through-hole (440) and the terminal block (400), the sealing portion (600) comprising: a first sealing portion (610) configured to be connected to the terminal block (400) to enclose both surfaces in the longitudinal direction and both surfaces in the height direction of the terminal block (400) and is equal to or greater than a length and a width of the terminal block (400); and a second sealing portion (620) formed to be connected to the inner side surface in the width direction of the terminal block (400) from which the end (501) of the electric wire (500) is pulled out and the end (501) of the electric wire (500).

Description

Background of the inventionTechnical field

[0001] The following disclosure relates to a brushless DC motor with built-in inverter (BLDC), and more particularly to a BLDC motor with built-in inverter capable of simplifying parts for forming a waterproof structure by forming a terminal block for waterproofing with electric wires connected to an inverter unit, and easily sealing between the inverter unit and the terminal block, and sealing between the terminal block and the electric wires. State of the art

[0002] A brushless direct current (BLDC) motor can eliminate friction and wear, which are disadvantages of existing DC motors, and has relatively high efficiency. Therefore, hybrid cars are recently adopting BLDC motors as a motor for rotating a cooling fan.

[0003] The BLDC motor is a motor that does not require a brush and commutator like a DC motor, but has an electronic commutation mechanism installed.

[0004] Furthermore, the existing BLDC motor structure for a low-voltage cooling fan for a vehicle has an integrally formed motor and inverter unit, which is thus composed of a BLDC motor with a built-in inverter.

[0005] Here is how in Fig. 1, an inverter case 21 is coupled to a bottom surface of the motor unit 10, a cover 22 is connected to a bottom surface of the inverter case 21, and a board substrate is provided in an internal space formed by the inverter case 21 and the cover 22, thus constituting the inverter unit 20. Further, one side of the inverter unit 20 is provided with a terminal block mounting portion 23 for connecting an internal PCB substrate and an external inverter control unit via a power supply line and a communication line, and a terminal block mounting portion 23 is connected to a through hole 24 for connecting between an inside and an outside thereof.Further, the terminal block 30 is provided with a communicating tube 31 protruding from a surface thereof and thus fixed to the terminal block mounting portion 23 by means of a fastener or the like, so that the communicating tube 31 is inserted into the through-hole 24. At this time, the communicating tube 31 is inserted into the through-hole 24 in a state where a terminal sealing rubber 40 such as an O-ring is inserted into an outer side of the connecting tube 31, so that a gap between the communicating tube 31 and the through-hole 24 is sealed. Further, the electric wires are connected to the PCB substrate in the inverter unit 20 via the communicating tube 31 and the through-hole 24, and the sealing rubber such as a wire seal is used to seal between the electric wires and an inner peripheral surface of the communicating tube 31.

[0006] That is, since the existing inverter-built BLDC motor uses a plurality of sealing rubbers for waterproofing between the inverter unit 20 and the terminal block 30 and waterproofing between the terminal block 30 and the electric wires, a structure of a terminal block package including the terminal block, the sealing rubbers, or the like is complicated, so that a process for manufacturing and assembling parts may be complicated and manufacturing costs may be increased.

[0007] Such a configuration as described above is already known from, among others, JP 2005 - 117 708 A. Further examples of previously known BLDC motors with a built-in inverter can be found in KR 10 2013 0 138 118 A, JP 2009 - 189 178 A, CN 1 03 066 754 A, US 2002 / 0 117 914 A1 and EP 2 490 324 A2. Description of the invention

[0008] An embodiment of the present invention is directed to providing a BLDC motor with a built-in inverter capable of easily sealing between an inverter unit and a terminal block and sealing between the terminal block and electric wires by forming a terminal block for waterproofing, with electric wires connected to an inverter unit, and simplifying parts for forming a waterproof structure.

[0009] This object is achieved by a BLDC motor with a built-in inverter according to the features of independent claim 1. Further embodiments emerge from the dependent claims.

[0010] According to the invention, a BLDC motor with a built-in inverter comprises: an inverter case 200 having one side coupled to a motor 100, an inner side being hollow and the other side being open, which is provided with an opening portion 240 through which a portion of an edge wall 230 is open, and a PCB substrate 210 provided in the hollow portion; a cover 300 connected to an open bottom of the inverter case 200 to seal a surface contacting the inverter case 200; a terminal block 400 arranged in a space formed by the opening portion 240 of the inverter case 200 and the cover 300 and provided with an electric wire through-hole 440 in a width direction such that an electric wire 500 is inserted to penetrate through the electric wire through-hole;and an electrical wire side terminal 510 connected to one end 501 of the electrical wire 500 penetrating through the terminal block 400;

[0011] The inverter-built BLDC motor further includes a sealing portion 600 configured to be connected to the terminal block 400 and the end 501 of the electric wire 500 so as to enclose both surfaces in a longitudinal direction and both surfaces in a height direction of the terminal block 400, and to be connected to an inner side surface in the width direction of the terminal block 400 from which the end 501 of the electric wire 500 is drawn out, the sealing portion 600 being configured to seal between a circumference in the height direction and the longitudinal direction of the terminal block 400 and an inner side surface of the inverter case 200 and the cover 300, and to seal between the electric wire 500 coupled by penetrating through the electric wire through-hole 440 and the terminal block 400.

[0012] The sealing portion includes a first sealing portion 610 configured to be connected to the terminal block 400 so as to enclose both surfaces in the longitudinal direction and both surfaces in the height direction of the terminal block 400 and equal to or larger than a length and a width of the terminal block 400; and a second sealing portion 620 configured to be connected to the inner side surface in the width direction of the terminal block 400, from which the end 501 of the electric wire 500 is drawn out, and the end 501 of the electric wire 500.

[0013] The terminal block 400 may be provided with a flange 415 protruding in the width direction and the length direction, and the first sealing portion 610 may be formed to be connected to a side surface in a width direction of the flange 415, and the flange 415 may be provided with the connecting part 416 connecting both side surfaces of the flange in the width direction.

[0014] The inverter housing 200 may have a guide groove 250 formed concavely on the inner surface thereof, and thus the flange 415 and the first sealing portion 610 of the terminal block 400 may be inserted into and placed on the guide groove 250.

[0015] The inverter case may include a mounting portion 410 of the terminal block 400 inserted between ends 232 of edge walls with which the opening portion 240 is provided on both sides in a longitudinal direction, and a coupling groove 231 may be formed along the edge wall 230 of the inverter case 200, wherein the mounting portion 410 of the terminal block 400 may be provided with a sealing material application groove 413 connected to the coupling groove 231, and a protruding part 311 may be formed along the edge wall 310 of the cover 300 such that the protruding part 311 is inserted into the coupling groove 231 and the sealing material application groove 413.

[0016] The sealing portion 600 may be formed by injection or deposition or from an O-ring.

[0017] The coupling groove 231 and the sealing material application groove 413 may be filled with a sealing material 630 to seal between the coupling groove 231 and the protruding part 311 and between the sealing material application groove 413 and the protruding part 311.

[0018] The terminal block 400 may include a locking plate 420 formed in an inner direction of the inverter case 200 in the width direction from a mounting portion 410, and the locking plate 420 may be formed to enclose the end 501 of the electric wire 500 pulled out in the inner direction in the width direction through the electric wire through-hole 400 to form a space portion 430 on the inner side, and the electric wire side terminal 510 may be coupled to penetrate through the locking plate 420, and thus the end 501 of the electric wire 500 may be connected to the electric wire side terminal 510 in the space portion 430.

[0019] A second sealing portion 620 may be formed by filling the space portion 430 of the terminal block 400.

[0020] The inverter housing 200 may be provided with a block fixing part 200, the terminal block 200 may be provided with a coupling portion, and the coupling portion 421 may be fixedly fixed to the block fixing part 200 by means of the fixing member 422.

[0021] The PCB substrate 210 provided in the inverter housing 200 may be provided with the substrate side terminal 211 to couple between the substrate side terminal 211 and the electrical wire side terminal 510.

[0022] One end of the substrate side terminal 211 and one end of the electric wire side terminal 510 may be bent upward to face each other, and the bent bending portions (212 and 511) may be coupled to each other while being in surface contact with each other.

[0023] The PCB substrate 210 provided in the inverter case 200 may be provided with a substrate-side PCB terminal 211a, and the stator 110 provided in the motor 100 may be provided with a three-phase terminal 120, and the three-phase terminal 120 of the stator 100 may penetrate through the inverter case 200 and the PCB substrate 210 so that the substrate-side PCB terminal 211a and the three-phase terminal are coupled to each other while being in surface contact with each other.

[0024] Further features and aspects will become apparent from the following detailed description, drawings and claims. Short description of the drawings Fig. Figure 1 is an exploded perspective view showing a waterproof structure of an existing BLDC motor with built-in inverter. Fig. 2 is a perspective assembly drawing showing a BLDC motor with a built-in inverter according to an exemplary embodiment of the present invention. Fig. 3 is an exploded perspective view of a state in which the BLDC motor with built-in inverter according to the present invention is reversed. Fig. 4 is a perspective assembly drawing of a state in which the terminal block of Fig. 3 is assembled in an inverter housing. Fig. 5 is a partial perspective drawing of an inverter case, in a part in which the terminal block according to an exemplary embodiment of the present invention is assembled. Fig. 6 is an exploded perspective view showing a state in which the electric wires and an electric wire side terminal are assembled in an inverter case according to an exemplary embodiment of the present invention and a sealing portion is formed. Fig. 7 is a perspective drawing showing a state in which the sealing portion is connected to the terminal block of Fig. 6 is coupled. Fig. 8 and Fig. 9 are a perspective drawing and a plan view of a state in which the terminal block mounting portion of Fig. 7 is assembled with an open side of the inverter housing. Fig. 10 and Fig. 11 is an exploded cross-sectional view before the terminal block mounting portion according to the present invention is assembled with the inverter case and the cover, and a cross-sectional assembly view after assembly. Fig. 12 to 14 are an exploded perspective view, an assembled perspective view, and a partial cross-sectional view illustrating a coupling structure of a three-phase terminal of a stator according to an exemplary embodiment of the present invention and a substrate-side PCB terminal. Description of the embodiments

[0025] Hereinafter, a BLDC motor with built-in inverter according to an exemplary embodiment of the present invention having a configuration as described above will be described in detail with reference to the accompanying drawings.

[0026] Fig. 2 is a perspective assembly drawing showing a BLDC motor with built-in inverter according to a present embodiment, Fig. 3 is an exploded perspective view of a state in which the BLDC motor with built-in inverter according to an exemplary embodiment of the present invention is reversed, and Fig. 4 to 11 are perspective drawings, a plan view, and cross-sectional drawings illustrating a state in which the inverter case, a cover, a terminal block, terminals, and a sealing portion according to an exemplary embodiment of the present invention are exploded or assembled.

[0027] As shown, a BLDC motor according to an exemplary embodiment of the present invention includes: an inverter case 200 having one side coupled to a motor 100, an inner side being hollow and the other side being open, which is provided with an opening portion 240 through which a portion of an edge wall 230 is open, and a PCB substrate 210 provided in the hollow portion; a cover 300 connected to an open bottom of the inverter case 200 to seal a surface contacting the inverter case 200; a terminal block 400 arranged in a space formed by the opening portion 240 of the inverter case 200 and the cover 300, and provided with an electric wire through-hole 440 in a width direction, and an electric wire 500 is inserted to penetrate through the electric wire through-hole;an electrical wire side terminal 510 connected to one end 501 of the electrical wire 500 penetrating through the terminal block 400;and a sealing portion 600 formed to be connected to the terminal block 400 and the end 501 of the electric wire 500 so as to enclose both surfaces in a longitudinal direction and both surfaces in a height direction of the terminal block 400 and to be connected to an inner side surface in the width direction of the terminal block 400 from which the end 501 of the electric wire 500 is drawn out, in that the sealing portion 600 is formed to seal between a circumference in the height direction and the longitudinal direction of the terminal block 400 and an inner side surface of the inverter case 200 and the cover 300, and to seal between the electric wire 500 coupled by penetrating through the electric wire through-hole 440 and the terminal block 400.

[0028] First, the motor 100 may be a BLDC motor, and may be an external BLDC motor whose inside is provided with a stator around which a drive coil is wound, and the outside is covered in a casing shape and has a rotor connected to a permanent magnet to rotate the rotor on the outside, and may also be an internal BLDC motor whose inside is provided with a rotor, and the outside is provided with a stator to rotate the rotor inside.

[0029] The inverter case 200 has a top surface coupled to the motor 100, an open bottom surface, and a hollow interior. Here, the hollow portion may be provided with the PCB substrate 210 for driving the motor 100, to couple between the PCB substrate 210 and the motor 100. Further, the inverter case 200 may be provided with the edge wall protruding downward along the circumference and the opening portion 240 through which a portion of the edge wall 230 is open. Further, the cover 300 may be coupled to the inverter case 200 to form an empty space therein, and the PCB substrate 210 may be provided in the space formed therein. Furthermore, the cover 300 may be coupled to the open bottom of the inverter case 200 and may be configured to seal the surface in which the inverter case 200 and the cover 300 are coupled to each other.At this time, the opening portion 240 provided in the inverter case 200 may be in an opened state in the state where the inverter case 200 and the cover 300 are connected.

[0030] The terminal block 400 is disposed in the opening portion 240 and can be inserted into the space formed by the opening portion 240 of the inverter case 200 and the cover 300. Therefore, as illustrated, the mounting portion 410 of the terminal block 400 can be inserted between the inverter case 200 and the cover 300 so that the opening portion 240 is blocked. Further, the electric wire through-hole 440 can penetrate through both surfaces of the mounting portion 410 in a width direction, so that the electric wire 500 can penetrate and pass through the mounting portion 410 of the terminal block 400. The electric wire 500 can be formed into various strands, including a power line and a communication line, and therefore, a plurality of electric wire through-holes 440 can be formed.

[0031] The electric wire side terminal 510 passes through the electric wire through-hole 440 formed in the mounting portion 410 of the terminal block 400 to be pulled out with the end 501 of the electric wire 500 toward the inner side surface in the width direction of the mounting portion 410. At this time, the electric wire side terminal 510 may be formed in a plurality to be connected to each of the electric wires, and may be coupled by soldering or the like so that the end 501 of the electric wire 500 and the electric wire side terminal overlap with each other.

[0032] The sealing portion 600 may be formed to enclose both surfaces in the longitudinal direction and both surfaces in the height direction of the mounting portion 410 of the terminal block 400 and may be connected to the mounting portion 410. Further, the sealing portion 600 may be formed to be connected to the inner side surface in the width direction of the mounting portion 410, which is a part of the end 501 of the electric wire 500 that passes through the electric wire through-hole 440 and the end 501 of the electric wire 500 is pulled out.

[0033] Therefore, the sealing portion 600 can be formed to enclose both surfaces in a longitudinal direction and both surfaces in a height direction of the mounting portion 410 to seal between the terminal block 400 and the inner side surface of the inverter case 200, and between the terminal block 400 and the inner side surface of the cover 300. Further, the sealing portion 600 is formed to be connected to the inner side surface in the width direction of the mounting portion 410, which is a part in which the end 501 of the electric wire 500 passes through the electric wire through-hole and is pulled out, and the end 501 of the electric wire 500 can seal between the electric wire 500, which is coupled by penetrating the electric wire through-hole 440, and the terminal block 400.

[0034] In this way, the BLDC motor with built-in inverter according to the exemplary embodiment of the present invention can easily seal between the inverter unit and the terminal block and seal between the terminal block and the electric wires by forming the terminal block for waterproofness with the electric wires connected to the inverter unit and by simplifying the parts for forming the waterproof structure.

[0035] Furthermore, the sealing portion 600 may be injection-molded and may therefore be formed integrally with the terminal block 400 and the electrical wire 500.

[0036] That is, the sealing portion 600 is formed to enclose both surfaces in the longitudinal direction and both surfaces in the height direction of the mounting portion 410 of the terminal block 400, and the sealing portion 600 formed to be connected to the inner side surface in the width direction of the mounting part 410, which is the part where the end 501 of the electric wire 500 passing through the electric wire through hole 440 can be pulled out, can be integrally formed with the terminal block 400 and the electric wire 500 by injection molding.

[0037] For example, the electric wires 500 are inserted into the electric wire through-hole 440 of the terminal block 400, and thus the electric wires 500 are inserted so that the ends 501 of the electric wires 500 penetrate the electric wire through-hole 440, and then the sealing portion 600 can be integrally formed with the terminal block 400 by injection molding. At this time, the sealing portion is injected in the state where the ends 501 of the electric wires 500 are connected to the electric wire side terminal 510 by soldering, so that the terminal block 400, the electric wire 500, and the electric wire side terminals 510 can be integrally formed.

[0038] Here, the sealing portion 600 can be formed in various ways other than the injection molding described above. For example, the sealing portion 600 can seal both the part filled with liquid or gel-like silicon or the like, and a part that contacts the silicon by being applied into or filling the space where the sealing portion 600 needs to be molded with the silicon, and then hardening the silicon.At this time, the silicon may be filled in the state where the electric wires 500 are assembled in the terminal block 400 to penetrate through the electric wire through-hole 440, and the silicon may also be filled in the state where the electric wire side terminal 510 is coupled to the end 501 of the electric wire 500, and the terminal block 400 coupled with the electric wire 500 and the electric wire side terminal 510 is assembled in the inverter case 200, and then the silicon is filled, and then the terminal block 400 is covered with the cover 300 to be coupled to the inverter case 200, so that the sealing portion 600 can be formed.

[0039] Further, the motor 100 is arranged at the bottom and the inverter case 200 is arranged at the top and the open surface of the inverter case 200 is directed upward, the terminal block 400 in which the electric wire 500, the electric wire side terminal 510 and the sealing portion 600 are assembled is assembled in the opening portion 240 of the inverter case 200, and then the terminal block 400 may have the top covered with the cover 300 to be coupled with the inverter case 200.

[0040] Therefore, both side surfaces in the height direction and both side surfaces in the length direction of the terminal block 400 are coupled to each other to be enclosed by the inverter case 200 and the cover 300, and the sealing portion 600 can seal between the inverter case 200 and the terminal block 400, and the cover 300 and the terminal block 400. Furthermore, the sealing portion 600 can seal between the electric wire 500, which is inserted to penetrate through the electric wire through-hole 440, and the terminal block 400. Furthermore, the inside of the electric wire through-hole 440 can be partially filled with a material constituting the sealing portion 600, and the sealing portion 600 can also be formed between the outside of the electric wire 500 and the electric wire through-hole 440.

[0041] Further, the sealing portion 600 is formed to be connected to the terminal block 400 and the end 501 of the electric wire 500 so as to enclose both surfaces in the longitudinal direction and both surfaces in the height direction of the terminal block 400, and may include a first sealing portion 610 formed to be larger than or equal to the length and width of the terminal block 400, and a second sealing portion 620 formed to be connected to the inner side surface in the width direction of the terminal block 400 from which the end 501 of the electric wire 500 is pulled out.

[0042] That is, the first sealing portion 610 may be formed to surround a portion of the mounting portion 410 of the terminal block 400 in the width direction, and the first sealing portion 610 may be formed to surround both surfaces in the length direction and both surfaces in the height direction of the mounting portion 410. Therefore, as illustrated, the first sealing portion 610 is formed in a rectangular ring shape so that its inner side can be connected to the mounting portion 410 and its outer side can adhere to the inverter case 200 and the cover 300 to seal the contact surface. Further, the second sealing portion 620 may be formed to connect to the inner side surface in the width direction of the terminal block 400 from which the end 501 of the electric wires 500 is drawn out and the end 501 of the electric wires 500.Thus, the space between the electric wire 500 and the electric wire through hole 440 can be sealed.

[0043] Further, the terminal block 400 is provided with a flange 415 protruding in the width direction and the length direction, and the first sealing portion 610 is formed to be connected to a side surface in the width direction of the flange 415.

[0044] As shown, the terminal block 400 has the flange 415 protruding from both sides in the longitudinal direction and both sides in the width direction in the mounting portion 410, and the first sealing portion 610 may be connected to the surface in the width direction toward the outside of the inverter case 200 between both surfaces in the width direction of the flange 415.

[0045] Therefore, the flange 415 can serve to support the first sealing portion 610, in particular, to improve the structural strength of the flange 415 against a force that can be applied to the first sealing portion 610 in the width direction.

[0046] Further, the flange 415 may be provided with a connecting part that connects the two side surfaces in the width direction.

[0047] That is, the first sealing portion 610 and the second sealing portion 620 may be integrally formed with the terminal block 400 by the double injection, so that the first sealing portion 610 and the second sealing portion 620 may be integrally formed to be connected to each other by means of the connecting part 416 connecting between both side surfaces in the width direction of the flange 415. At this time, the connecting part 416 may be formed differently. For example, as shown, the connecting part 416 may be formed in the shape in which a portion of the top side and a portion of the bottom side in the height direction of the flange are removed, and may also be formed in a connecting hole formed to penetrate the flange 415 in the width direction.

[0048] In this way, the shape of the mold for double injection can also be simplified and the sealing portion 600 can be more strongly connected to the terminal block 400 to maintain the sealing force for a long period of time.

[0049] Further, the inverter case 200 may have a guide groove 250 formed concavely on the inner surface thereof, and thus the flange 415 of the terminal block 400 and the first sealing portion 610 may be inserted into and placed on the guide groove 250.

[0050] That is, as illustrated as an example, a portion of the ends 232 of the edge wall at the portion where the opening portion 240 of the inverter case 200 is formed is formed to protrude in the longitudinal direction, a stepped portion 241 is formed, and a guide rib 251 is formed to protrude on the inner side surface of the inverter case 200 while being spaced inward in the width direction from the end 232 of the edge wall, so that the guide groove 250 can be formed between the end 232 of the edge wall and the stepped portion 241 and the guide rib 251.At this time, in the drawings, the guide groove 250 is formed in the height direction and the longitudinal direction, and the flange 415 of the terminal block 400 and both sides in the longitudinal direction and the lower side in the height direction of the first sealing portion 610 can be inserted into and placed on the guide groove 250.

[0051] In this way, the terminal block 400 provided with the sealing portion 600 can be easily assembled into the inverter housing 200 by inserting the flange 415 and the first sealing portion 610 along the guide groove 250 from above. In this way, the sealing force between the inverter housing 200, the cover 300, and the terminal block 400 can be improved.

[0052] Further, the inverter case 200 may include a mounting portion 410 of the terminal block 400 inserted between the ends 232 of the edge walls with which the opening portion is provided on both sides in a longitudinal direction, and a coupling groove 231 may be formed along the edge wall 230 of the inverter case 200, the mounting portion 310 of the terminal block 400 may be provided with the sealing material application groove 413 connected to the coupling groove, and a protruding part 311 may be formed along the edge wall 310 of the cover such that the protruding part 311 is inserted into the coupling groove 231 and the sealing material application groove 413.

[0053] That is, in order to improve the coupling force and the sealing force at the part where the inverter case 200 and the cover 300 contact each other and the part where the cover 300 and the terminal block 400 contact each other, the coupling groove 231 may be formed on the top side along the edge wall 230 of the inverter case 200, and the sealing material application groove 413 connected to the coupling groove 231 may be formed at the mounting portion 410 of the terminal block 400, so that the protruding part 311 formed on the cover 300 can be inserted into the coupling groove 231 and the sealing material application groove 413.

[0054] Further, the sealing portion 600 may be formed by injection molding or deposition, or may be formed of an O-ring.

[0055] That is, the sealing portion 600 may be integrally formed by injection or deposition to facilitate sealing after the terminal block 400 and the electric wire 500 are assembled. Alternatively, the O-ring may be coupled to enclose the terminal blocks 400 to seal both surfaces in the longitudinal direction and both surfaces in the height direction in which the terminal block 400 contacts the inverter case 200 and the cover 300, and even the part where the terminal block 400 and the electric wire 500 contact each other may be sealed by interposing the O-ring therebetween.

[0056] Further, the coupling groove 231 and the sealing material application groove 413 may be filled with a sealing material 630 to seal between the coupling groove 231 and the protruding part 311 and between the sealing material application groove 413 and the protruding part 311.

[0057] That is, the coupling groove 231 and the sealing material application groove 413 are coated or injected with the sealing material 630 and then coupled with the cover 300 to achieve reliable sealing. Here, the coupling groove 231 of the inverter case 200 and the sealing material application groove 413 of the terminal block 400 may have the same cross-sectional shape, height, and width to be connected to each other, thereby easily applying the sealing material 630 to each other.

[0058] Further, the terminal block 400 may include a locking plate 420 formed in the inner direction of the inverter case 200 in the width direction from the mounting portion 410, wherein the locking plate 420 may be configured to enclose the end 501 of the electric wire 500 drawn out inward in the width direction through the electric wire through-hole 440 to form a space portion 430 on the inside, and the electric wire side terminal 510 may be coupled to penetrate through the locking plate 420, and thus the end 501 of the electric wire 500 may be coupled to the electric wire side terminal 510 in the space portion 430.

[0059] That is, as shown, the terminal block 400 is formed with the locking plate 420 inward in the width direction of the mounting portion 410, and the locking plate 420 can be arranged in a “ "-fabrication mold may be formed so that the ends extending from both sides of the longitudinal direction of the mounting portion 410 to the inside in the width direction are connected to each other in the longitudinal direction. In this way, the ends 501 of the electric wires 500 can be arranged in the space portion 430, which is the internal space formed by the mounting portion 410 and the locking plate 420. At this time, the electric wire side terminals 510 may be coupled to the locking plate 420 arranged to face the mounting portion 410, and the electric wire side terminals 510 are coupled to penetrate the locking plate 420, so that the end 501 of the electric wire 500 and one side of the electric wire side terminals 510 can be coupled to each other by welding or the like in the space portion 430.

[0060] Also, the second sealing portion 620 may be formed by filling the space portion 430 of the terminal block 400.

[0061] That is, the second sealing portion 620 is formed to fill the space portion 430 in the state where the end 501 of the electric wire 500 and one side of the electric wire side terminal 510 are coupled by welding or the like, so that the welded part in which the end 501 of the electric wire 500 and one side of the electric wire side terminal 510 are coupled to each other is enclosed and fixed by the second sealing portion 620.

[0062] Furthermore, the inverter housing 200 may be provided with a block fixing part 220, wherein the terminal block 400 may be provided with a coupling portion 421, and the coupling portion 421 may be fixedly fixed to the block fixing part 220 by means of the fixing element 422.

[0063] That is, as illustrated, the inverter case 200 may be provided with the block fixing part 220 having an internal thread, and the terminal block 400 may be formed with the coupling portion 421 provided with the through hole, so that the terminal block 400 can be firmly fixed to the inverter case 200 by the fixing member 422 such as a bolt. In this case, for example, the coupling portion 421 may be formed on the locking plate 420 of the terminal block 400, and the coupling portion 421 may be disposed in the space portion 430. The coupling portion 421 may be disposed at a central part in the longitudinal direction, and thus the terminal block 400 may be fixed to the inverter case 200 by means of a fixing member 422. Here, the part where the coupling portion 421 is formed may not be provided with the second sealing portion 620.

[0064] Further, the PCB substrate 210 provided in the inverter case 200 may be provided with a substrate side terminal 211 to couple between the substrate side terminal 211 and the electrical wire side terminal 510.

[0065] That is, the substrate side terminal 211 may be formed on the PCB substrate 210 provided in the inverter case 200 so as to coincide with the electric wire side terminal 510, so that when the terminal block 400 in which the electric wire 500, the electric wire side terminal 510, and the sealing portion 600 are integrally formed is assembled in the inverter case 200, the substrate side terminal 211 and the electric wire side terminal 510 may overlap or oppose each other while being close to each other and may be coupled to each other by soldering or the like.

[0066] At this time, the end of the substrate side terminal 211 and the end of the electric wire side terminal 510 may be bent upward to face each other, and the bent bending portions 212 and 511 may be connected to each other while being in surface contact with each other.

[0067] That is, as shown, the end of the substrate-side terminal 211 and the end of the electrical wire-side terminal 510 are bent upward to face each other, so that the substrate-side terminal 211 and the electrical wire-side terminal 510 can be in surface contact with each other by the elastic force of the terminals. Furthermore, the bent portions 212 and 511 can be easily coupled by soldering, laser welding, electric resistance welding, or the like, so that assembly performance can be improved.

[0068] Further, the PCB substrate 210 provided in the inverter case 200 is provided with the substrate-side PCB terminal 211a, and the stator 110 provided inside the motor 100 is provided with the three-phase terminal 120. The three-phase terminal 120 of the stator penetrates through the inverter case 200 and the PCB substrate 210, so that the substrate-side PCB terminal 211a and the three-phase terminal 120 can be coupled to each other while being in surface contact with each other.

[0069] That is, with reference to the Fig.12 to 14, the inside of the motor 100 coupled to the inverter case 200 is provided with the stator 110 around which the drive coil is wound, so that the stator 110 can be provided with the three-phase terminals 120 in the above shape. Further, the PCB substrate 210 provided in the inverter case 200 can be provided with the substrate-side PCB terminals 211a projecting upward. In this way, the three-phase terminals 120 of the stator 110 penetrate through the inverter case 200 and the PCB substrate 210, so that the substrate-side PCB terminal 211a and the three-phase terminal 120 can be easily coupled to each other while being in surface contact with each other. At this time, the part where the three-phase terminal 120 penetrates through the inverter case 200 may be sealed with the sealing material or the like.

[0070] Further, the substrate-side PCB clamp 211a extends upward from the PCB substrate 210, and an upper end thereof is bent to a direction parallel to the side of the PCB substrate 210 and then bent upward to form a bent portion 212a, and the bent portion 212a and the three-phase clamp 120 can be in surface contact with each other.

[0071] That is, as illustrated, the substrate-side PCB clamp 211a may be provided with the bending portion 212a by bending it horizontally outward along the width direction, which is a horizontal direction and a plane in the longitudinal direction, and the three-phase clamp may be in surface contact with the bending portion 212a. In this way, it is possible to facilitate surface contact and coupling due to the elasticity of the clamps.

[0072] The BLDC motor with built-in inverter according to the exemplary embodiment of the present invention can easily seal between the inverter unit and the terminal block and seal between the terminal block and the electric wires by forming the terminal block for waterproofness with the electric wires connected to the inverter unit and simplifying the parts for forming the waterproof structure.

[0073] Furthermore, it is possible to improve the assembly performance by simply connecting the electrical wires to the PCB substrate.

[0074] The present invention is not limited to the above-mentioned embodiments, but can be variously applied and can be modified in various ways by those skilled in the art to which the present invention relates without departing from the gist of the present invention claimed in the claims. List of reference symbols 1000 BLDC motor with built-in inverter 100 engine 110 Stator 120 three-phase terminal 200 inverter housings 210 PCB substrate 211 Substrate side clamp 211a Substrate-side PCB clamp 212a Bending section 212 Bending section 220 block fastening part 230 edge wall 231 coupling groove 232 End of the edge wall 240 opening section 241 stepped section 250 guide groove 251 Guide rib 300 coverage 310 edge wall 311 Preceding part 400 terminal block 410 assembly section 413 Sealing material application groove 415 flange 416 connecting part 420 locking plate 421 coupling section 422 Fastening element 430 room section 440 electrical wire through hole 500 electrical wire 501 End 510 electrical wire side terminal 511 Bending section 600 sealing section 610 first sealing section 620 second sealing section 630 sealing material

Claims

[1] BLDC motor with built-in inverter (1000), comprising: an inverter case (200) having one side coupled to a motor (100), an inner side being hollow and the other side being open, provided with an opening portion (240) by means of which a portion of an edge wall (310) is open, and further comprising a PCB substrate (210) provided in the hollow portion; a cover (300) connected to an open bottom of the inverter housing (200) to seal a surface contacting the inverter housing (200); a terminal block (400) arranged in a space formed by the opening portion (240) of the inverter case (200) and the cover (300) and provided with an electric wire through-hole (440) in a width direction so that an electric wire (500) is inserted to penetrate through the electric wire through-hole (440); an electrical wire side terminal (510) connected to one end (501) of the electrical wire (500) penetrating through the terminal block (400); and a sealing portion (600) configured to be connected to the terminal block (400) and the end (501) of the electric wire (500) to enclose both surfaces in a longitudinal direction and both surfaces in a height direction of the terminal block (400) and to be connected to an inner side surface in the width direction of the terminal block (400) from which the end (501) of the electric wire (500) is pulled out, wherein the sealing portion (600) is formed to seal between a circumference in the height direction and the length direction of the terminal block (400) and an inner side surface of the inverter case (200) and the cover (300) and to seal between the electric wire (500) coupled by penetrating through the electric wire through-hole (440) and the terminal block (400), the sealing portion (600) comprising: a first sealing portion (610) configured to be connected to the terminal block (400) to enclose both surfaces in the longitudinal direction and both surfaces in the height direction of the terminal block (400) and is equal to or greater than a length and a width of the terminal block (400); and a second sealing portion (620) formed to be connected to the inner side surface in the width direction of the terminal block (400) from which the end (501) of the electric wire (500) is pulled out and the end (501) of the electric wire (500). [2] The BLDC motor with built-in inverter (1000) according to claim 1, wherein the terminal block (400) is provided with a flange (415) projecting in the width direction and the length direction, and the first sealing portion (610) is formed to be connected to a side surface in a width direction of the flange (415). [3] The inverter-built-in BLDC motor (1000) according to claim 2, wherein the inverter case (200) has a guide groove (250) formed concavely on the inner side surface thereof, and thus the flange (415) and the first sealing portion (610) of the terminal block (400) are inserted into and placed on the guide groove (250). [4] The BLDC motor with built-in inverter (1000) according to claim 1, wherein the inverter housing (200) has a mounting portion (410) of the terminal block (400) inserted between ends of edge walls (232) with which the opening portion is provided on both sides in a longitudinal direction, and a coupling groove (231) is formed along the edge wall (230) of the inverter housing (200), wherein the mounting portion (410) of the terminal block (400) is provided with a sealing material application groove (413) connected to the coupling groove (231), wherein a protruding part (311) is formed along the edge wall (230) of the cover (300) such that the protruding part (311) is inserted into the coupling groove (231) and the sealing material application groove (413). [5] The BLDC motor with built-in inverter (1000) according to any one of the preceding claims, wherein the sealing portion (600) is formed by injection or deposition or from an O-ring. [6] The BLDC motor with built-in inverter (1000) according to claim 5, wherein the coupling groove (231) and the sealing material application groove (413) are filled with a sealing material (630) to seal between the coupling groove (231) and the protruding part (311) and between the sealing material application groove (413) and the protruding part (311). [7] The BLDC motor with built-in inverter (1000) according to claim 1, wherein the terminal block (400) has a locking plate (420) formed in an inner direction of the inverter case (200) in the width direction from a mounting portion (410), and the locking plate (420) is formed to enclose the end (501) of the electric wire (500) drawn out in the direction of the inside in the width direction through the electric wire through-hole (440) to form a space portion (430) on the inside, and the electrical wire side terminal (510) is coupled so that it penetrates through the locking plate (420) and thus the end (501) of the electrical wire (500) is connected to the electrical wire side terminal (510) in the space portion (430). [8] The BLDC motor with built-in inverter (1000) according to claim 7, wherein a second sealing portion (620) is formed by filling the space portion (430) of the terminal block (400). [9] The BLDC motor with built-in inverter (1000) according to claim 8, wherein the inverter housing (200) is provided with a block fixing part (220), the terminal block (400) is provided with a coupling portion (421), and the coupling portion (421) is fixedly fixed to the block fixing part (220) by means of the fixing member (422). [10] The BLDC motor with built-in inverter (1000) according to claim 7, wherein the PCB substrate (210) provided in the inverter case (200) is provided with the substrate side terminal (211) to couple between the substrate side terminal (211) and the electrical wire side terminal (510). [11] The BLDC motor with built-in inverter (1000) according to claim 10, wherein one end of the substrate side terminal (211) and one end of the electric wire side terminal (510) are bent upward to face each other, and the bent bending portions (511) are coupled to each other while being in surface contact with each other. [12] BLDC motor with built-in inverter (1000) according to claim 1, wherein the PCB substrate (210) provided in the inverter housing (200) is provided with a substrate-side PCB terminal (211a) and the stator (110) provided in the motor (100) is provided with a three-phase terminal (120), and the three-phase terminal (120) of the stator (110) penetrates through the inverter case (200) and the PCB substrate (210) so that the substrate-side PCB terminal (211a) and the three-phase terminal (120) are coupled to each other while being in surface contact with each other.

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