KR20240028692A - Motor - Google Patents

Abstract

The embodiment includes a housing including a plate portion in which a hole is formed and a side wall portion protruding axially from the plate; A stator disposed inside the housing; a rotor disposed to correspond to the stator; A shaft coupled to the rotor; and a bus bar disposed corresponding to the stator, wherein the bus bar includes a bus bar body and a terminal disposed on the bus bar body, and the bus bar body includes a body and a stator protruding from the body toward the plate portion. It includes a first protrusion formed, and a second protrusion formed to protrude from the first protrusion, wherein the first protrusion contacts the plate part, and the second protrusion starts a motor disposed inside the hole. Accordingly, the motor can improve sealing performance of the hole while securing the true position of the bus bar by using a step structure and a separation prevention structure.

Description

motor{MOTOR}

The embodiment relates to a motor.

A motor is a device that converts electrical energy into rotational energy by using the force a conductor receives in a magnetic field. Recently, as the uses of motors have expanded, the role of motors has become more important. In particular, as the electrification of automobiles progresses rapidly, the demand for motors applied to steering systems, braking systems, and design systems is increasing significantly.

The motor includes a housing, a cover disposed in the opening of the housing, a shaft, a rotor installed on the outer peripheral surface of the shaft, a stator disposed corresponding to the rotor, and a stator disposed on top of the stator. It may include a bus bar and a bearing disposed on the outer peripheral surface of the shaft.

Here, the bus bar may include a bus bar body and a terminal disposed on the bus bar body. Additionally, the terminal may penetrate the housing for electrical connection to an external power source.

At this time, a hole may be formed in the housing for the penetration. However, external foreign substances may enter the motor due to the hole.

Accordingly, it is possible to solve problems caused by internal inflow of foreign substances by arranging the packing to be inserted into the hole in a fitting manner. At this time, the packing may be placed in the hole by being press-fitted from the outside of the housing.

However, the penetration direction of the terminal and the insertion direction of the packing are opposite to each other based on the hole, and as a result, the terminal is pushed in the direction opposite to the penetration direction by the load generated when the packing is pressed in.

In other words, the load caused by the combination of the packing affects the true position of the bus bar through the terminal.

In addition, there is a problem that the productivity of the motor is reduced due to the additional costs and processes caused by the packing.

Accordingly, there is a demand for the development of a structurally improved motor that can secure the true position of the bus bar while sealing the hole.

The embodiment provides a motor that secures the true position of the bus bar through a step structure formed on the bus bar.

The embodiment provides a motor that prevents foreign substances from entering through holes while preventing separation of the bus bar through a separation prevention structure formed on the bus bar.

The problems to be solved by the embodiment are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the description below.

The above task includes a housing including a plate portion in which a hole is formed and a side wall portion protruding axially from the plate; A stator disposed inside the housing; a rotor disposed to correspond to the stator; A shaft coupled to the rotor; and a bus bar disposed corresponding to the stator, wherein the bus bar includes a bus bar body and a terminal disposed on the bus bar body, and the bus bar body includes a body and a stator protruding from the body toward the plate portion. It includes a first protrusion formed and a second protrusion formed to protrude from the first protrusion, the first protrusion is in contact with the plate part, and the second protrusion is achieved by a motor disposed inside the hole. .

Preferably, the plate part includes a first groove formed concavely on an inner surface forming the hole, and a hook formed to protrude from the second protrusion can be coupled to the groove.

Preferably, the groove may be formed along the perimeter of the inner surface.

Preferably, the bus bar body includes a third protrusion formed by molding a portion of the second protrusion, and the third protrusion may be disposed in a second groove disposed around the hole.

Preferably, the stator includes a stator core, an insulator disposed on the stator core, and a coil wound around the insulator, and a portion of the insulator may be in contact with the body.

Preferably, the bus bar is inserted into the housing heated to a predetermined temperature, and as the housing cools, the second protrusion can seal the hole.

In the embodiment, the bus bar may be positioned at a preset position within the housing through a step structure formed on the bus bar. That is, the embodiment can secure the true position of the bus bar by using the step structure.

In the embodiment, the true position of the bus bar can be secured through the first protrusion and the second protrusion that implement a stepped structure, and the hole of the housing where the terminal is placed can be sealed. In detail, the hole of the housing can be sealed through a second protrusion disposed in a fitting manner. Furthermore, by arranging the bus bar inside the housing using a hot press method, sealing performance through the second protrusion can be further improved.

The embodiment uses a separation prevention structure to prevent separation of the bus bar and improve sealing performance for the hole. For example, the separation prevention structure includes coupling of the hole of the housing with the second protrusion through a fitting method, coupling of the hole of the housing with the second protrusion through a hot pressing method, a locking structure using a hook, and heat fusion. It can be implemented through the use of a hanging structure, etc. Here, the housing may be formed of a metal material, and the second protrusion may be formed of a synthetic resin material.

The various and beneficial advantages and effects of the embodiments are not limited to the above-described content, and may be more easily understood through description of specific embodiments of the embodiments.

1 is a perspective view showing a motor according to an embodiment,
Figure 2 is a cross-sectional view of the motor along line AA in Figure 1;
Figure 3 is a cross-sectional view of the motor along line BB in Figure 1;
4 is a perspective view showing the housing of a motor according to an embodiment;
Figure 5 is a cross-sectional view of the housing taken along line CC of Figure 4;
Figure 6 is a perspective view showing a bus bar of a motor according to an embodiment;
7 is a plan view showing a bus bar of a motor according to an embodiment;
8 is a side view showing a bus bar of a motor according to an embodiment;
Figure 9 is a perspective view showing the arrangement relationship between the motor housing and the bus bar according to the embodiment;
Figure 10 is a cross-sectional view showing the arrangement relationship between the motor housing and the bus bar according to the embodiment;
Figure 11 is a cross-sectional view showing a modified example of the arrangement relationship between the motor housing and the bus bar according to the embodiment.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and one or more of the components may be selectively combined or replaced between embodiments.

Additionally, when described as being formed or disposed "above" or "below" each component, "above" or "below" refers not only to cases where two components are in direct contact with each other, but also to one This also includes cases where another component described above is formed or placed between two components. In addition, when expressed as "top (above) or bottom (bottom)", it may include not only the upward direction but also the downward direction based on one component.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

FIG. 1 is a perspective view showing a motor according to an embodiment, FIG. 2 is a cross-sectional view of the motor along line A-A of FIG. 1, FIG. 3 is a cross-sectional view of the motor along line B-B of FIG. 1, and FIG. 4 is a cross-sectional view of the motor according to an embodiment. It is a perspective view showing the housing of the motor, FIG. 5 is a cross-sectional view of the housing taken along line C-C of FIG. 4, FIG. 6 is a perspective view showing a bus bar of the motor according to an embodiment, and FIG. 7 is a bus bar of a motor according to an embodiment. It is a top view, Figure 8 is a side view showing the bus bar of the motor according to the embodiment, Figure 9 is a perspective view showing the arrangement relationship between the motor housing and the bus bar according to the embodiment, and Figure 10 is the housing of the motor according to the embodiment. This is a cross-sectional view showing the arrangement relationship of the bus bars.

The X direction shown in FIG. 2 may mean a radial direction or a first direction, and the Y direction may mean an axial direction or a second direction. Additionally, the axial direction and the radial direction may be perpendicular to each other. Here, the axial direction may be the longitudinal direction of the shaft 600. Additionally, reference numeral 'C' shown in FIG. 2 may mean the center of rotation (center of axis). And, the direction along a circle with a radial radius based on the axis center (C) may be called the circumferential direction.

Referring to Figures 1 to 3, the motor according to the embodiment includes a housing 100 with an opening formed on one side, a cover 200 disposed in the opening, a stator 300 disposed inside the housing 100, The rotor 400 disposed inside the stator 300, the bus bar 500 disposed on the upper side of the stator 300, the shaft 600 coupled to the rotor 400, and the outer peripheral surface of the shaft 600 It may include a bearing 700 disposed in. Here, the inside may mean a direction disposed toward the rotation center (C) of the motor based on the radial direction, and the outside may mean a direction opposite to the inside.

The housing 100 and cover 200 may form the external shape of the motor. Additionally, a receiving space may be formed inside the housing 100 and the cover 200 by combining the housing 100 and the cover 200. Accordingly, as shown in FIG. 2, a stator 300, a rotor 400, a bus bar 500, a shaft 600, etc. may be disposed in the receiving space.

The housing 100 may be formed in a cylindrical shape and may form the external shape of the motor. Additionally, the housing 100 can accommodate a stator 300, a rotor 400, etc. therein.

At this time, the shape or material of the housing 100 may be changed in various ways. For example, the housing 100 may be made of a metal material such as aluminum that can withstand high temperatures.

Accordingly, the motor can place the stator 300 and the bus bar 500 inside the housing 100 by hot pressing. Here, the hot pressing method may mean a method of fixing the stator 300, etc. inside during the size change process through heating and cooling of the housing 100. In detail, the stator 300 is inserted while the housing 100 is heated to a predetermined temperature to expand the housing 100 and temporarily increase the size of the housing 100. Then, by cooling the housing 100, the housing 100 returns to its original state and the size of the housing 100 decreases. Accordingly, the housing 100 is pressed against the inside of the stator 300, thereby fixing the stator 300 to the housing 100.

Referring to FIGS. 4 and 5 , the housing 100 may include a plate portion 110 in which a hole 111 is formed and a side wall portion 120 protruding from the plate in the axial direction. Here, the plate portion 110 and the side wall portion 120 may be formed integrally.

The plate portion 110 may be formed in a disk shape. Accordingly, the plate portion 110 has a first surface 112 disposed to face the bus bar 500 in the axial direction and a second surface 113 that is opposite to the first surface 112. may include.

The hole 111 may be formed to penetrate in the axial direction from the first surface 112 to the second surface 113. Accordingly, the plate portion 110 may include an inner surface 111a forming the hole 111.

As the hole 111 is formed to penetrate the plate portion 110, the second protrusion 513 of the bus bar 500 may be disposed inside the hole 111.

That is, the hole 111 is formed for the second protrusion 513 and may be called a first hole. At this time, separately from the first hole, the plate portion 110 may include a second hole 116 where the shaft 600 is disposed. Here, the second hole 116 may also be formed in the plate portion 110 to penetrate in the axial direction.

Meanwhile, the plate portion 110 may include a first groove 114 concavely formed on the inner surface 111a.

Additionally, the hook 514 of the bus bar 500 may be placed in the first groove 114. In addition, foreign matter flowing into the first groove 114 through a gap between the hole 111 and the second protrusion 513 may accumulate inside the first groove 114 without flowing into the motor. That is, the first groove 114 can be used as a structure to prevent foreign substances from entering.

Here, the first grooves 114 are formed to face each other and be spaced apart on the inner surface 111a as an example, but it is not necessarily limited to this.

For example, the first groove 114 may be formed along the perimeter of the inner surface 111a. When the first groove 114 is formed along the periphery of the inner surface 111a, foreign substances flowing in through the gap between the hole 111 and the second protrusion 513 are formed in the first groove 114. You can be guided by: Accordingly, the first groove 114 formed along the circumference can further improve sealing performance than the plurality of first grooves 114 arranged to be spaced apart from each other.

Additionally, the plate portion 110 may further include a second groove 115 concavely formed on the second surface 113. Here, the second groove 115 may be disposed around the hole 111. Accordingly, the radial size of the second groove 115 is formed to be larger than the radial size of the hole 111.

In addition, the third protrusion 515 of the bus bar 500, which is provided as a separation prevention structure, may be disposed in the second groove 115.

The side wall portion 120 may extend in the axial direction from the edge of the plate portion 110. Additionally, a stator 300 or the like may be disposed inside the side wall portion 120, and the side wall portion 120 may support the stator core 310 by the hot pressing method.

Meanwhile, the housing 100 may include a pocket portion capable of accommodating the bearing 700. Here, the pocket portion may be formed by a protrusion formed to protrude from the inside of the housing 100, and may be called a housing pocket portion. Also, the pocket portion may be formed in the plate portion 110.

The cover 200 may be placed on the opening surface of the housing 100, that is, on the lower part of the housing 100, to cover the opening of the housing 100.

Additionally, the cover 200 may include a pocket portion capable of accommodating the bearing 700. Here, the pocket part of the cover 200 may be called a cover pocket part, and may be formed through a protrusion formed to protrude from the cover 200.

Referring to FIG. 2, the stator 300 may include a stator core 310, an insulator 320 disposed on the stator core 310, and a coil 330 wound on the insulator 320.

A coil 330 forming a rotating magnetic field may be wound around the stator core 310. Here, the stator core 310 may be formed as a single core or may be formed by combining a plurality of split cores.

In addition, the stator core 310 may be formed by stacking a plurality of thin steel plates, but is not necessarily limited thereto. For example, the stator core 310 may be formed as a single piece.

Additionally, the stator core 310 may include a cylindrical yoke (not shown) and a plurality of teeth (not shown) protruding from the yoke in the radial direction.

The plurality of teeth may be arranged to be spaced apart from each other along the circumferential direction of the yoke. Accordingly, a slot, which is a space where the coil 330 is wound, may be formed between the teeth.

Meanwhile, the teeth of the stator 300 may be arranged to have an air gap with the rotor 400. Here, the air gap may be the distance between the tooth and the magnet 420 in the radial direction.

The insulator 320 insulates the stator core 310 and the coil 330. Accordingly, the insulator 320 may be disposed between the stator core 310 and the coil 330.

Accordingly, the coil 330 may be wound around the stator core 310 on which the insulator 320 is disposed.

Additionally, the insulator 320 can support the bus bar 500 by being placed in contact with the bus bar 500 . Accordingly, the position of the bus bar 500 located at a preset position can be maintained.

Referring to FIG. 2, the insulator 320 may include an insulator body 321, an inner guide 322, and an outer guide 323.

A coil 330 may be wound around the insulator body 321. Additionally, the insulator body 321 may be coupled to the tooth of the stator core 310.

The inner guide 322 and the outer guide 323 prevent the coil 330 wound around the insulator body 321 from being separated and serve to guide the winding position of the coil 330.

The inner guide 322 is disposed inside the insulator body 321 as the center. Here, the upper end of the inner guide 322 may contact the bus bar body 510 of the bus bar 500. Accordingly, the inner guide 322 can support the bus bar 500.

The outer guide 323 is disposed outside of the insulator body 321.

The rotor 400 rotates through electrical interaction with the stator 300. At this time, the rotor 400 may be rotatably disposed on the stator 300.

Referring to FIG. 2, the rotor 400 may include a rotor core 410 and a plurality of magnets 420 disposed outside the rotor core 410. Here, the rotor 400 may be formed as a Surface Permanent Magnet (SPM) type in which a magnet 420 is attached to the surface of the rotor core 410, but is not necessarily limited thereto.

Additionally, the rotor 400 may further include a can that protects the rotor core 410 and the magnet 420. At this time, the can may be arranged to cover the rotor core 410 to which the magnet 420 is coupled.

The rotor core 410 may be implemented as a stack of a plurality of thin steel plates or may be implemented as a single cylinder.

Additionally, the rotor core 410 may be formed in a cylindrical shape. Here, a hole into which the shaft 600 is coupled may be formed in the center of the rotor core 410.

The magnet 420 forms a rotating magnetic field with the coil 330 of the stator 300. Accordingly, the rotor 400 rotates due to the electrical interaction between the coil 330 and the magnet 420, and the shaft 600 rotates in conjunction with the rotation of the rotor 400, thereby generating the driving force of the motor. do. Here, the magnet 420 of the rotor 400 may be called a drive magnet.

A plurality of magnets 420 may be disposed on the outer peripheral surface of the rotor core 410, spaced apart from each other along the circumferential direction.

The bus bar 500 may be placed on top of the stator 300, as shown in FIG. 2.

Additionally, the bus bar 500 may be electrically connected to the coil 330 of the stator 300.

Referring to FIGS. 2 and 3 , the bus bar 500 may be disposed on the upper part of the stator 300 in the axial direction and may be supported by the insulator 320 .

Referring to FIGS. 6 to 8 , the bus bar 500 may include a bus bar body 510 and a plurality of terminals 520 disposed on the bus bar body 510. Here, the bus bar body 510 may be formed of a synthetic resin material, and the terminal 520 may be formed of a metal material.

The bus bar body 510 may be a mold formed through injection molding. For example, the bus bar 500 may be formed by injecting the bus bar body 510 while the plurality of terminals 520 are spaced apart from each other. That is, the terminal 520 can be placed on the bus bar body 510 through an insert injection method.

In addition, the bus bar body 510 can be fixed to the housing 100 at a preset position through a stepped structure and a separation prevention structure.

The bus bar body 510 includes a body 511, a first protrusion 512 formed to protrude from the body 511 toward the plate portion 110, and a first protrusion 512 formed to protrude from the first protrusion 512. It may include two protrusions 513, and a hook 514 formed to protrude from the second protrusion 513. Here, the body 511, the first protrusion 512, the second protrusion 513, and the hook 514 may be formed as one body.

The body 511 may be formed in a ring shape having an inner peripheral surface (511a) and an outer peripheral surface (511b). At this time, based on the radial direction, the radius R1 of the inner peripheral surface 511a is smaller than the radius R2 of the outer peripheral surface 511b.

Additionally, a protrusion protruding in the axial direction may be formed on the upper part of the body 511, and the protrusion may be formed to have a stepped structure.

The protrusion may include a first protrusion 512 and a second protrusion 513. As the step structure is implemented using the first protrusion 512 and the second protrusion 513, the first protrusion 512 and the second protrusion 513 may be used to implement the step structure. The protrusion 512 may include a stepped surface 512a.

Here, the step surface 512a contacts the first surface 112 of the plate portion 110 to secure the true position of the bus bar 500. For example, when the bus bar 500 is inserted toward the plate portion 110 from inside the housing 100, the stepped surface 512a comes into contact with the first surface 112. Accordingly, the bus bar 500 is located at a preset position through the step surface 512a that contacts the first surface 112. Here, the step surface 512a may be called a contact surface or an upper surface of the first protrusion 512.

Also, the motor can prevent the bus bar 500 from moving by using the step structure. For example, axial flow of the bus bar 500 can be prevented through contact between the first surface 112 and the step surface 512a and contact between the bus bar body 510 and the insulator 320. Additionally, it is possible to prevent the bus bar 500 from flowing in the horizontal direction through the second protrusion 513 inserted into the hole 111. Here, the horizontal direction may be perpendicular to the axial direction.

The first protrusion 512 may be integrally formed to protrude in the axial direction from the upper surface of the body 511. Additionally, the first protrusion 512 may contact the housing 100 through the step surface 512a.

In addition, three first protrusions 512 may be formed corresponding to the number of terminals 520 exposed to the outside of the housing 100.

At this time, some areas of the first protrusion 512 may not overlap with the body 511 in the axial direction. Accordingly, the degree of design freedom regarding the arrangement of the terminal 520 can be improved.

Referring to FIG. 7 , a portion of any one of the plurality of first protrusions 512 may be disposed closer to the center than the inner peripheral surface 511a. For example, in the case of the first protrusion 521 disposed in the middle of the three first protrusions 512 based on the circumferential direction, a portion of the first protrusion 521 may be disposed closer to the center than the inner peripheral surface 511a.

Additionally, another part of the plurality of first protrusions 512 may be disposed farther from the center than the outer peripheral surface 511b. For example, in the case of the first protrusion 512 disposed adjacent to the first protrusion 521 disposed in the center among the three first protrusions 512 in the circumferential direction, a portion of the first protrusion 512 is disposed farther from the center than the outer peripheral surface 511b. It can be.

Accordingly, the motor can freely move the position of the terminal 520 by arranging a portion of the first protrusion 512 so as not to overlap the body 511 in the axial direction. At this time, the end of the terminal 520 disposed outside the housing 100 is disposed to overlap the body 511 in the axial direction.

The second protrusion 513 may be formed integrally with the first protrusion 512 to protrude in the axial direction. At this time, the second protrusion 513 may be arranged to be spaced apart from the edge of the first protrusion 512 in the horizontal direction to form the stepped surface 512a.

Also, the second protrusion 513 may be inserted into the hole 111. Accordingly, the stepped surface 512a of the first protrusion 512 may contact the housing 100.

At this time, the axial end of the second protrusion 513 may be disposed to protrude beyond the second surface 113. As shown in FIG. 3, the end of the terminal 520 disposed inside the second protrusion 513 may be exposed to the outside of the housing 100.

The hook 514 may be formed to protrude from the second protrusion 513. At this time, the hook 514 may be placed on the side of the second protrusion 513.

Additionally, the hook 514 may be coupled to the first groove 114 to prevent the bus bar 500 from being separated. Here, the hooks 514 may be formed in a number corresponding to the first grooves 114.

However, when the first groove 114 is formed along the perimeter of the inner surface 111a, the hook 514 also has the shape of the second protrusion 513 corresponding to the shape of the first groove 114. It can be formed along the perimeter.

Figure 11 is a cross-sectional view showing a modified example of the arrangement relationship between the motor housing and the bus bar according to the embodiment.

Referring to FIG. 11, the bus bar body 510 may form a third protrusion 515 by molding a portion of the second protrusion 513. At this time, the third protrusion 515 is disposed in the second groove 115 to prevent the bus bar 500 from being separated from the housing 100.

The third protrusion 515 may be formed by molding a corner of the upper end of the second protrusion 513, and may be arranged to overlap the first protrusion 512 in the axial direction. Accordingly, since a portion of the plate portion 110 is disposed between the first protrusion 512 and the third protrusion 515 in the axial direction, separation of the bus bar body 510 is prevented. can do.

For example, as a predetermined amount of heat is locally applied to the upper corner area of the second protrusion 513, a portion of the second protrusion 513 flows and fills the second groove 115, thereby forming the third protrusion ( 515) can be formed. That is, the third protrusion 515 may be formed by heat fusion molding.

Here, the third protrusion 515 is formed by heat fusion as an example, but is not necessarily limited thereto. For example, the third protrusion 515 may be formed by caulking the upper corner area of the second protrusion 513. However, the third protrusion 515 formed by the heat fusion method has higher sealing performance than the third protrusion 515 formed by the caulking method.

The plurality of terminals 520 may be arranged to be spaced apart from each other.

Additionally, the terminal 520 may be electrically connected to the coil 330 of the stator 300.

Additionally, a portion of the terminal 520 exposed to the outside may be electrically connected to an external connector (not shown). Accordingly, power may be supplied to the stator 300 through the external connector. For example, a portion of the terminal 520 may be disposed to penetrate the housing 100 and be exposed to the outside, so that it may be electrically connected to an external power source.

The shaft 600 may be rotatably disposed inside the housing 100 by the bearing 700. Additionally, the shaft 600 may rotate in conjunction with the rotation of the rotor 400.

In addition, the shaft 600 may be coupled to the hole formed in the center of the rotor core 410 by press-fitting. Here, the shaft 600 may be formed of a metal material with a predetermined rigidity.

As the bearing 700 is disposed on the outer peripheral surface of the shaft 600, the shaft 600 can rotate within the accommodation space. .

Additionally, the bearing 700 may include a bearing disposed on the upper side and a bearing disposed on the lower side of the shaft 600 depending on the arrangement position.

Additionally, the bearing 700 may include a housing bearing disposed in the housing 100 and a cover bearing disposed in the cover 200.

Additionally, the bearing 700 may include an outer ring (not shown), an inner ring (not shown), and a ball (not shown) disposed between the outer ring and the inner ring.

In summary, the motor can secure the true position of the bus bar 500 through the step structure formed by the first protrusion 512 and the second protrusion 513 of the bus bar 500.

Additionally, the motor can prevent the bus bar 500 from being separated from the housing 100 through a separation prevention structure. At this time, the motor can prevent foreign substances from entering through the hole 111 by providing a separation prevention structure considering sealing performance.

Here, the separation prevention structure may be provided as a second protrusion 513 that is coupled to the hole 111 in a fitting manner.

Additionally, the separation prevention structure may be provided by combining the hole 111 of the housing 100 and the second protrusion 513 through a hot press fitting method. At this time, since the second protrusion 513 is in close contact with the inner surface 111a by the hot pressing method, the second protrusion 513 can seal the first hole 111.

Additionally, the separation prevention structure may be provided by combining the first groove 114 and the hook 514. At this time, the inflow of foreign substances can be prevented by the first groove 114 and the hook 514 disposed in the first groove 114.

Additionally, the separation prevention structure may be provided as a third protrusion 515 formed by heat fusion molding. At this time, the third protrusion 515 is disposed in the second groove 115 concavely formed around the hole 111 to improve sealing performance of the first hole 111.

The motor according to the embodiment can be used in various devices such as vehicles or home appliances.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

100: housing
110: plate part 111: hole
114: 1st groove 115: 2nd groove
200: Cover
300: Stator
400: rotor
500: Bus bar
510: busbar body 511: body
512: first protrusion 513: second protrusion
514: hook 515: third protrusion
600: shaft
700: Bearing

Claims (13)

A housing including a plate portion in which a hole is formed and a side wall portion protruding axially from the plate;
A stator disposed inside the housing;
a rotor disposed to correspond to the stator;
A shaft coupled to the rotor; and
It includes a bus bar disposed corresponding to the stator,
The bus bar includes a bus bar body and a terminal disposed on the bus bar body,
The bus bar body includes a body, a first protrusion formed to protrude from the body toward the plate portion, and a second protrusion formed to protrude from the first protrusion,
The first protrusion contacts the plate portion,
The second protrusion is a motor disposed inside the hole. According to paragraph 1,
As the second protrusion is inserted into the hole, the end of the terminal is exposed to the outside of the housing. According to paragraph 2,
The plate portion includes a first groove concavely formed on an inner surface forming the hole,
A hook formed to protrude from the second protrusion is coupled to the groove. According to paragraph 3,
A motor wherein the groove is formed along the circumference of the inner surface. According to paragraph 1,
The plate portion includes a first surface, a second surface opposite to the first surface, and the hole formed to penetrate from the first surface to the second surface,
The first protrusion is a motor in contact with the first surface. According to clause 5,
The plate portion includes a second groove concavely formed on the second surface,
The second groove is a motor disposed around the hole. According to clause 6,
The bus bar body includes a third protrusion formed by molding a portion of the second protrusion,
The third protrusion is a motor disposed in the second groove. In clause 7,
The third protrusion is a motor formed by heat fusion molding. In clause 7,
The third protrusion is arranged to overlap the first protrusion in the axial direction. According to paragraph 1,
The body is formed in a ring shape having an inner peripheral surface and an outer peripheral surface,
The plurality of first protrusions are disposed on the body to be spaced apart from each other,
A motor in which a portion of one of the first protrusions is disposed closer to the center than the inner circumferential surface. According to clause 10,
A motor in which another part of the first protrusion is disposed farther from the center than the outer peripheral surface. According to paragraph 1,
The stator includes a stator core, an insulator disposed on the stator core, and a coil wound around the insulator,
A portion of the insulator is a motor that contacts the body. According to paragraph 1,
The bus bar is inserted into the housing heated to a predetermined temperature,
The second protrusion seals the hole as the housing cools.

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