motor

Abstract

The present invention can provide a motor, which includes: a housing; a stator, which is arranged in the housing; a rotor, which is arranged in the stator; a bus bar, which is arranged on the stator; a plate, which is arranged on the bus bar; and a terminal part, which includes a main body part in contact with the plate and a protrusion protruding from the main body part and arranged on the plate, wherein a portion of the main body part is arranged between the housing and the plate in a radial direction.

Description

Technical Field

[0001] Embodiments relate to a motor. Background Art

[0002] The motor may include a rotor, a stator, a housing, and a plate. The rotor and stator are contained within the housing. The housing is a cylindrical member with an open upper portion. The plate covers the open upper portion of the housing. Busbars may be provided on the stator. The terminals of the busbars may be connected to the coils wound around the stator, and the terminals of the busbars may be connected to terminal portions extending in the axial direction. The terminal portions are connected to an external power source.

[0003] Since the terminal portion extends in the axial direction, the connection between the mold of the terminal portion and the plate may be deteriorated. In order to improve the connection, the protrusion of the terminal portion passing through the plate may be ultrasonically welded to be connected to the plate.

[0004] However, ultrasonic welding of the protruding portion has the problem of difficulty in managing the welded portion. In addition, there are problems such as the complexity of the ultrasonic welding process and the terminal portion being shaken during the welding process, causing the terminal portion to deviate from its position. Summary of the Invention

[0005] Technical issues

[0006] Therefore, the embodiment is directed to solving the above-mentioned problems and is directed to providing a motor in which a terminal portion is easily assembled.

[0007] Objects to be achieved by the present invention are not limited to the above-described objects, and other objects not described above will be clearly understood by those skilled in the art through the following description.

[0008] Technical Solution

[0009] One aspect of the present invention provides a motor, comprising: a housing; a stator disposed in the housing; a rotor disposed in the stator; a bus bar disposed on the stator; a plate disposed on the bus bar; and a terminal portion, the terminal portion comprising a main body portion in contact with the plate and a protrusion protruding from the main body portion and disposed on the plate, wherein a portion of the main body portion is disposed between the housing and the plate in a radial direction.

[0010] Another aspect of the present invention provides a motor, which includes: a housing; a stator, which is arranged in the housing; a rotor, which is arranged in the stator; a bus bar, which is arranged on the stator; a plate, which is arranged on the bus bar; and a terminal portion, which includes a main body portion in contact with the plate and a protrusion protruding from the main body portion and protruding upward from the plate, wherein the main body portion includes a first area and a second area, in which the main body portion is overlapped with the plate in the radial direction, in which the main body portion is overlapped with the plate in the axial direction, and the first area is arranged outside the plate in the radial direction.

[0011] Another aspect of the present invention provides a motor, which includes: a housing; a stator, which is arranged in the housing; a rotor, which is arranged in the stator; a bus bar, which is arranged on the stator; a plate, which is arranged on the bus bar; and a terminal part, which includes a body part that contacts the plate and a protrusion that protrudes from the body part and protrudes upward from the plate, wherein the body part includes a first body arranged on the plate, a second body arranged below the plate, and a third body connecting the first body and the second body, and the third body is arranged outside the plate.

[0012] The body portion may include a first hole passing from an outside of the body portion to an inside of the body portion in a first direction, and the plate may include a first protrusion protruding from an edge of the plate and disposed in the first hole.

[0013] The body portion may include a second protrusion protruding in the axial direction, the plate may include a second hole provided to have a length greater than a width, and the second protrusion is positioned at the second hole, and a longitudinal direction of the second hole may be parallel to the first direction.

[0014] The body portion may include a first surface disposed to face an inner peripheral surface of the housing, and the second hole may be provided in the first surface.

[0015] The body portion may include a plurality of first ribs that protrude from the first surface in the radial direction and contact the inner peripheral surface of the housing.

[0016] The first hole may include a second surface and a third surface arranged to face each other in the axial direction, the distance between the second surface and the third surface in the axial direction may be greater than the thickness of the plate and less than the height of the main body, and at least one of the boundary between the second surface and the inner surface of the main body and the boundary between the third surface and the inner surface of the main body may include a first inclined surface.

[0017] The body portion may include a second rib that protrudes from at least any one of the second surface and the third surface and contacts the board.

[0018] The terminal portion may include a power terminal connected to a bus bar terminal of the bus bar, the plate may include a third hole disposed to correspond to a position of the power terminal, and the first protrusion may be disposed to overlap the third hole in the first direction.

[0019] Beneficial effects

[0020] According to an embodiment, there is an advantage in that the terminal portion can be easily assembled with the board without performing an ultrasonic welding process or using a separate fastening member.

[0021] According to this embodiment, there is an advantage in that deformation or generation of foreign matter is reduced during the assembly process of the terminal portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a view showing a motor according to an embodiment.

[0023] Figure 2 is a view showing the bus bar, the plate, and the terminal portion before coupling.

[0024] Figure 3 This is a perspective view of the terminal portion.

[0025] Figure 4 This is a front view of the terminal section.

[0026] Figure 5 It is a view showing the main body portion of the terminal portion.

[0027] Figure 6 It is shown along Figure 3 A side sectional view taken along line AA showing a state where the terminal portion and the board are mounted on the housing.

[0028] Figure 7 It is shown along Figure 3 A side sectional view taken along line BB showing a state where the terminal portion and the board are mounted on the housing.

[0029] Figure 8 is a view showing a plate.

[0030] Figure 9 It is a view showing a state in which the first rib is in contact with the inner surface of the housing in a state in which the terminal portion is mounted on the housing.

[0031] Figure 10 This is a set of perspective views showing a state where the terminal portion and the board are assembled.

[0032] Figure 11 A set of side views showing a state where the terminal portion and the board are assembled. DETAILED DESCRIPTION

[0033] The direction parallel to the longitudinal direction (vertical direction) of the axis will be referred to as the axial direction, the direction perpendicular to the axial direction around the axis will be referred to as the radial direction, and the direction along the circumference of a circle having a radius in the radial direction around the axis will be referred to as the circumferential direction.

[0034] Figure 1 is a view showing a motor according to an embodiment.

[0035] Reference Figure 1 The motor according to the embodiment may include a rotor 100, a magnet 200, a stator 300, a cover 400, a housing 500, a bus bar 600, a plate 700, and a terminal portion 800. Hereinafter, the term "inward" refers to a direction toward the rotor 200 in a radial direction of the motor, and the term "outward" refers to a direction opposite to "inward."

[0036] The rotor 100 may be a hollow member with one side open. Both ends of the rotor 100 may be rotatably supported by bearings in the axial direction. The rotor 100 may be configured so that parts having different outer diameters are divided in the axial direction.

[0037] The magnet 200 may be disposed on the outer circumferential surface of the rotor 100 .

[0038] The stator 300 is disposed outside the magnet 200. The stator 300 may include a stator core 310, an insulator 320 mounted on the stator core 310, and a coil 330 wound around the insulator 320. The coil 330 generates a magnetic field. The stator core 310 may be a single member or a combination of multiple separate cores. In addition, the stator core 310 may be formed in the form of multiple thin steel plates stacked on top of each other, but is not necessarily limited to this. For example, the stator core 310 may also be formed as a single component.

[0039] The cover 400 fixes the magnet 200 to the rotor 100. The cover 400 surrounds the magnet 200 and a partial area of ​​the rotor 100. The cover 400 may be a molded member formed in an over-molding manner or a pot member or an adhesive member surrounding the magnet.

[0040] The housing 500 may be provided outside the stator 300. The housing 500 may be a cylindrical member with an upper portion thereof opened. The rotor 100, the magnet 200, the stator 300, and the cover 400 are accommodated in the housing 500. In addition, the housing 500 may accommodate a bearing that supports the rotor 100.

[0041] The bus bar 600 is provided on the stator 300. The bus bar 600 connects the coils 330 wound around the stator 300.

[0042] The plate 700 is provided on the bus bar 600. The bearing 10 is accommodated in the plate 700.

[0043] The terminal portion 800 is provided on the board 700 .

[0044] Figure 2 is a view showing the bus bar 600 , the plate 700 , and the terminal part 800 before coupling.

[0045] Reference Figure 2 and Figure 3 , the busbar 600 can be arranged below the plate 700. The busbar 600 may include a busbar body 610 and a busbar terminal 620. The busbar body 610 may be an annular molded component. The busbar terminal 620 may be connected to the end of the coil 330. In addition, the first terminal 621 of the busbar terminal 620 contacts the terminal portion 800. The first terminal 621 is arranged to extend upward. The three first terminals 621 can be connected to the U-phase, V-phase, and W-phase power supplies, respectively.

[0046] The plate 700 is disposed on the bus bar 600. The plate 700 may be an annular member. A bearing supporting the rotor 100 may be disposed within the plate 700.

[0047] The terminal portion 800 may include a body portion 810 , a power terminal 820 , and a protrusion 830 .

[0048] The body portion 810 is fixed to the board 700 and the housing 500 .

[0049] The power terminal 820 is connected to an external power source or a terminal of a housing cover of the external power source. The power terminal 820 is fixed to the protrusion 830. The second terminal 821 of the power terminal 820 contacts the first terminal 621 of the bus bar 600.

[0050] The protrusion 830 surrounds the power terminal 820. The protrusion 830 protrudes from the body portion 810 and is provided on the board 700. The protrusion 830 is provided to extend so that the power terminal 820 is connected to an external power source or a terminal of a housing cover of the external power source.

[0051] The terminal portion 800 is a unit separate from the bus bar 600 .

[0052] Figure 3 This is a three-dimensional diagram of the terminal part. Figure 4 This is a front view of the terminal section.

[0053] Reference Figures 2 to 4 , the protrusion 830 protrudes from the body portion 810. The protrusion 830 is used to support the power terminal 820 provided to extend in the longitudinal direction and guide the power terminal 820 to an external power source or a terminal of a housing cover connected to the external power source.

[0054] A portion of each power terminal 820 is exposed from the front end of the protrusion 830. In addition, the protrusion 830 includes an opening 831. The opening 831 is used to expose the second power terminal 821 of the power terminal 820 to the outside for fusing. When the power terminal 820 is fixed to the plate 700, when the plate 700 is fixed to the housing 500, the first power terminal 621 of the bus bar 600 and the second power terminal 821 of the terminal portion 800 are arranged to overlap so as to contact each other in the opening 831.

[0055] Figure 5 1 is a view showing the body portion 810 of the terminal portion 800 .

[0056] Reference Figure 5 The body portion 810 is fixed to the housing 500 and the board 700 and structurally supports the power terminal 820 provided on the protrusion 830 together with the protrusion 830. The body portion 810 may include a first body 811, a second body 812 and a third body 813.

[0057] The first body 811 is positioned on the plate 700. The protrusion 830 protrudes from the first body 811. The second body 812 is positioned below the plate 700. The third body 813 connects the first body 811 and the second body 812. The third body 813 can be provided as a plurality of third bodies 813. The plurality of third bodies 813 can be provided separately from each other. First holes 814 passing through the inner and outer sides of the body portion 810 can be provided between the third bodies 813. The first holes 814 are holes into which the first protrusions 710 of the plate 700 are inserted.

[0058] The first rib 815 can be provided on the first surface 801 of the body portion 810 so as to protrude in the radial direction. The first surface 801 is the surface facing the inner circumferential surface of the housing 500. The first rib 815 is the portion that contacts the inner surface 520 of the housing 500 during the installation of the terminal portion 800 on the housing 500. The first rib 815 can be provided to extend in the axial direction. In addition, the first rib 815 can be provided as a plurality of first ribs. For example, some of the plurality of first ribs 815 can be provided on one side of the first hole 814, and other first ribs can be provided on the other side of the first hole 814. In addition, some of the plurality of first ribs 815 can be provided to intersect the first hole 814. The second rib 814c can be provided to protrude from the inner surface of the body portion 810 in which the first hole 814 is formed. The second rib 814c contacts the first protrusion 710 of the plate 700 inserted into the first hole 814.

[0059] The body portion 810 may include a second protrusion 816. The second protrusion 816 may protrude in the axial direction from the lower surface of the first body 811. The second protrusion 816 serves to guide the assembly direction of the terminal portion 800 during assembly of the terminal portion 800 with the board 700.

[0060] Figure 6 It is shown along Figure 3 A side sectional view taken along line AA of FIG. 5 is a view showing a state in which the terminal portion 800 and the plate 700 are mounted on the housing 500 .

[0061] Reference Figure 5 and Figure 6 After assembling the terminal part 800 with the board 700, the terminal part 800 and the board 700 may be mounted on the housing 500. The terminal part 800 and the board 700 may be mechanically coupled without performing an ultrasonic welding process or using a separate fastening member.

[0062] In the axial direction, the space between the lower surface of the first body 811 and the upper surface of the second body 812 is formed as a slit, and the terminal portion 800 and the plate 700 can be mechanically assembled in a form in which a portion of the plate 700 is inserted into the space. In addition, in a state where the terminal portion 800 is coupled to the plate 700, the terminal portion 800 is mounted on the step 510 provided on the inner surface 520 of the housing 500 to be further coupled to the housing 500. Therefore, a portion of the body portion 810 is provided between the housing 500 and the plate 700 in the radial direction.

[0063] The body portion 810 includes a first region S1 that overlaps the plate 700 in the radial direction and a second region S2 that overlaps the plate 700 in the axial direction. The first region S1 is disposed within the third body 813 and is located outside the plate 700. The second region S2 is disposed within the first body 811 and the second body 812 and is located at the upper and lower sides of the plate 700 relative to the plate 700. The third body 813 can contact the inner surface 520 of the housing 500. The second body 812 can be disposed below the plate 700 and contact the step 510 of the housing 500.

[0064] Figure 7 It is shown along Figure 3 8 is a side sectional view taken along line BB of the embodiment of the present invention showing a state where the terminal portion 800 and the plate 700 are mounted on the housing 500 .

[0065] Reference Figure 7When the plate 700 is assembled with the terminal portion 800, the first protrusion 710 of the plate 700 is disposed in the first hole 814 of the body portion 810. The first hole 814 may include a second surface 814a and a third surface 814b disposed to face each other in the axial direction. A distance d between the second surface 814a and the third surface 814b in the axial direction may be greater than the thickness t of the plate 700 and less than the height h of the body portion 810.

[0066] The first inclined surface 812a may be provided on at least one of a boundary between the second surface 814a and the inner surface 520 of the body portion 810 and a boundary between the third surface 814b and the inner surface 520 of the body portion 810. The first inclined surface 812a expands the entrance of the first hole 814 to guide the first protrusion 710 of the plate 700 to slide easily and be inserted into the first hole 814.

[0067] The second inclined surface 813b may also be provided at a corner around the boundary of the lower surface and the outer surface of the body portion 810. When the terminal portion 800 is mounted on the housing 500 in a state where the terminal portion 800 is fixed to the board 700, the second inclined surface 813b is used to reduce interference between the body portion 810 and the housing 500.

[0068] Figure 8 is a view showing the board 700 .

[0069] Reference Figure 8 , the plate 700 may include a first protrusion 710 , a second hole 720 , and a third hole 730 .

[0070] The first protrusion 710 protrudes outward from the edge of the board 700 in a first direction F. In this case, the first direction F is the direction in which the terminal portion 800 slides to be assembled with the board 700. The first hole 814 of the body portion 810 is also formed in the first direction F to correspond to the protruding direction of the first protrusion 710. The edge 711 of the first protrusion 710 may have a curved surface. In this case, the center of curvature of the edge 711 of the first protrusion 710 may be the same as the center C of the board 700.

[0071] The second hole 720 is a hole that passes through the plate 700 in the axial direction, and the first protrusion 710 of the plate 700 is provided therein. When the body portion 810 is inserted into the plate 700, the second protrusion 816 moves along the second hole 720 to guide the movement of the body portion 810. The second hole 720 may be formed concavely inward from the edge of the plate 700.

[0072] The second holes 720 are also arranged in the first direction F. The second holes 720 can be provided as a plurality of second holes 720. For example, the second holes 720 can include a 2-1 hole 721 and a 2-2 hole 722. The 2-1 hole 721 can be provided on one side of the first protrusion 710, and the 2-2 hole 722 can be provided on the other side of the second protrusion 816. Each of the longitudinal directions of the 2-1 hole 721 and the 2-2 hole 722 is a direction parallel to the first direction F.

[0073] The third hole 730 is a hole that passes through the plate 700 in the axial direction, and the busbar terminal 620 of the busbar 600 passes through the third hole. When the terminal portion 800 is assembled with the plate 700, the position of the third hole 730 corresponds to the position of the power terminal 820 of the terminal portion 800. The first protrusion 710 can be arranged to overlap with the third hole 730 in the first direction F.

[0074] Figure 9 5 is a view showing a state in which the first rib 815 is in contact with the inner surface 520 of the housing 500 in a state in which the terminal portion 800 is mounted on the housing 500 .

[0075] Reference Figure 9 When the terminal portion 800 is mounted on the housing 500, the first ribs 815 are in contact with the inner surface 520 of the housing 500. When the first surface 801 of the body portion 810 is in direct contact with the inner surface 520 of the housing 500, a gap is generated between the body portion 810 and the inner surface 520 of the housing 500, and thus there is a risk of movement or separation of the terminal portion 800. However, when the plurality of first ribs 815 are in contact with the inner surface 520 of the housing 500, movement of the terminal portion 800 is prevented.

[0076] Figure 10 is a set of perspective views showing a state where the terminal portion 800 and the board 700 are assembled, and Figure 11 1 and 2 are a set of side views showing a state where the terminal portion 800 and the board 700 are assembled.

[0077] Figure 10 (a) and Figure 11 (a) is a view showing the terminal portion 800 and the board 700 before assembly is performed, and shows a state in which the first hole 814 of the terminal portion 800 is aligned with the first protrusion 710 of the board 700 . Figure 10 (b) and Figure 11(b) is a view showing a state in which the terminal portion 800 is pushed and fixed to the plate 700 in the first direction F. When the terminal portion 800 is pushed in the first direction F, the first protrusion 710 is inserted into the first hole 814, so that the terminal portion 800 is connected to the plate 700. In this case, the first protrusion 710 of the plate 700 moves along the first hole 814 of the plate 700 to guide the movement of the terminal portion 800. When the first protrusion 710 is inserted into the first hole 814, the first protrusion 710 contacts the second rib 814c. Therefore, when compared with a state in which the first protrusion 710 is in direct contact with the second surface 814a or the third surface 814b, the movement of the plate 700 that may occur between the first hole 814 and the first protrusion 710 can be reduced.

[0078] As described above, since the terminal portion 800 is pushed from the outside of the plate 700 to the inside of the plate in the radial direction to assemble the terminal portion 800 and the plate 700, there is an advantage that the assembly process is very simple and can be performed quickly. In addition, since the first body 811 and the second body 812 of the terminal portion 800 fix the plate 700 from the upper side and the lower side of the plate 700 in the axial direction, and the third body 813 of the terminal portion 800 simultaneously restricts the plate 700 in the radial direction, the terminal portion 800 can be firmly connected to the plate 700 without using a separate fastening member or without performing a welding process.

[0079] In addition, when the terminal part 800 is installed on the shell 500, since the inner surface 520 of the shell 500 restricts the main body part 810 of the terminal part 800 so as not to allow the main body part 810 of the terminal part 800 to separate in the radial direction, and in particular, the outer surface of the main body part 810 is in contact with the inner surface 520 of the shell 500, the structural stability is much higher when compared with the case where the terminal part 800 is assembled using a fastening member or by a welding process.

[0080] The above-described embodiments can be applied to various devices such as vehicles and home appliances.

Claims

1. A motor, comprising: case; a stator disposed in the housing; a rotor disposed in the stator; a bus bar, the bus bar being arranged on the stator; a plate disposed on the bus bar; as well as a terminal portion including a body portion contacting the board and a protrusion protruding from the body portion and provided on the board, wherein a portion of the body portion is disposed between the housing and the plate in a radial direction, wherein the body portion comprises a first hole, the first hole passing through the outer side and the inner side of the body portion in a first direction; wherein the plate includes a first protrusion protruding from an edge of the plate and disposed in the first hole, wherein the first hole includes a second surface and a third surface arranged to face each other in the axial direction, and The body portion includes a second rib protruding from at least one of the second surface and the third surface and in contact with the plate.

2. The motor according to claim 1, wherein The body portion includes a first region and a second region, the first region being arranged to overlap the plate in a radial direction, the second region being arranged to overlap the plate in the axial direction, and The first region is arranged outside the plate in the radial direction.

3. The motor according to claim 1, wherein The body portion includes a first body disposed on the plate, a second body disposed below the plate, and a third body connecting the first body and the second body, and The third body is disposed outside the plate.

4. The motor according to claim 1, wherein: The body portion includes a second protrusion protruding in the axial direction; The plate includes a second hole, the second hole is configured to have a length greater than a width, and the second protrusion is positioned at the second hole; and A longitudinal direction of the second hole is parallel to the first direction.

5. The motor according to claim 4, wherein The body portion includes a first surface disposed to face an inner peripheral surface of the housing, and the second hole is provided in the first surface.

6. The motor according to claim 5, wherein The body portion includes a plurality of first ribs that protrude from the first surface in the radial direction and contact the inner peripheral surface of the housing.

7. The motor according to claim 1, wherein: a distance between the second surface and the third surface in the axial direction is greater than the thickness of the plate and less than the height of the body portion; and At least one of a boundary between the second surface and an inner surface of the body portion and a boundary between the third surface and the inner surface of the body portion includes a first inclined surface.

8. The motor according to claim 1, wherein: The terminal portion includes a power terminal connected to a bus bar terminal of the bus bar; The plate includes a third hole disposed to correspond to a position of the power terminal; and The first protrusion is disposed to overlap the third hole in the first direction.

Images