motor

Abstract

To provide a motor in which a terminal part is easily assembled.SOLUTION: The present invention may provide a motor including: a housing; a stator disposed in the housing; a rotor disposed in the stator; a busbar disposed on the stator; a plate disposed on the busbar; and a terminal part including a body part in contact with the plate and a protruding part protruding from the body part and disposed on the plate; where a part of the body part is disposed between the housing and the plate in a radial direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The embodiments relate to a motor.

Background Art

[0002] A motor can include a rotor, a stator, a housing, and a plate. The rotor and the stator are included in the housing. The housing is a cylindrical member with an open top. The plate covers the open top of the housing. A bus bar can be arranged on the upper side of the stator. The terminal of the bus bar is connected to the coil wound around the stator, and the terminal of the bus bar can be connected to a terminal portion that extends axially long. The terminal portion is connected to an external power source.

[0003] Since the terminal portion extends axially long, the bonding property between the mold of the terminal portion and the plate may decrease. To enhance the bonding property, the protruding portion of the terminal portion penetrating the plate can be ultrasonically welded to be bonded to the plate.

[0004] However, the ultrasonic welding of the protrusion has the problem that it is difficult to manage the welded portion. Also, the ultrasonic welding process is complicated, and there is a problem that the terminal portion shakes and its position is displaced during the welding process.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, the embodiments are for solving the above problems, and an object is to provide a motor in which the assembly of the terminal portion is easy.

[0006] The problems to be solved by the present invention 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 following description.

Means for Solving the Problems

[0007] An embodiment for achieving the above objective can provide a motor comprising a housing, a stator disposed within the housing, a rotor disposed within the stator, a busbar disposed on the stator, a plate disposed on the busbar, and a terminal portion including a body portion in contact with the plate and a projection portion protruding from the body portion and disposed on the plate, wherein a portion of the body portion is disposed radially between the housing and the plate.

[0008] The embodiment provides a motor comprising a housing, a stator disposed within the housing, a rotor disposed within the stator, a busbar disposed on the stator, a plate disposed on the busbar, and a terminal portion including a body portion in contact with the plate and a projection portion protruding from the body portion and onto the plate, wherein the body portion includes a first region disposed to overlap the plate in the radial direction and a second region disposed to overlap the plate in the axial direction, and the first region is disposed radially outside the plate.

[0009] The embodiment provides a motor comprising a housing, a stator disposed within the housing, a rotor disposed within the stator, a busbar disposed on the stator, a plate disposed on the busbar, and a terminal portion including a body portion in contact with the plate and a projection portion protruding from the body portion and onto the plate, 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 and second bodies, and the third body being disposed outside the plate.

[0010] Preferably, the body portion includes a first hole that penetrates the outside and inside of the body portion in a first direction, and the plate may include a first projection that protrudes from the edge of the plate and is positioned in the first hole.

[0011] Preferably, the body portion includes a second projection projecting in the axial direction, the plate includes a second hole in which the second projection is located and which is positioned longer than its width, and the longitudinal direction of the second hole may be parallel to the first direction.

[0012] Preferably, the body portion is positioned opposite the inner circumferential surface of the housing and may include a first surface on which the second hole is located.

[0013] Preferably, the body portion may include a plurality of first ribs that project radially from the first surface and contact the inner circumferential surface of the housing.

[0014] Preferably, the first hole includes a second and a third surface that are arranged opposite each other with respect to the axial direction, the axial distance between the second and third surfaces being greater than the thickness of the plate and less than the height of the body, and at least one of the boundary between the second surface and the inner surface of the body and the boundary between the third surface and the inner surface of the body may include a first inclined surface.

[0015] Preferably, the body portion may include a second rib that protrudes from at least one of the second and third surfaces and contacts the plate.

[0016] Preferably, the terminal portion includes a power terminal connected to the busbar terminal of the busbar, the plate includes a third hole positioned to correspond to the position of the power terminal, and in the first direction, the first projection may be positioned to overlap the third hole. [Effects of the Invention]

[0017] According to the examples, there is an advantage in that the terminal portion can be easily assembled to the plate without ultrasonic welding or separate fastening members.

[0018] According to the examples, there is an advantage in that deformation and foreign matter generation can be reduced during the assembly process of the terminal section. [Brief explanation of the drawing]

[0019] [Figure 1] It is a drawing showing the motor according to the embodiment. [Figure 2] It is a drawing showing the bus bar, the plate, and the terminal portion before connection. [Figure 3] It is a perspective view of the terminal portion. [Figure 4] It is a front view of the terminal portion. [Figure 5] It is a drawing showing the body portion of the terminal portion. [Figure 6] It is a side sectional view showing the state where the terminal portion and the plate are mounted on the housing with reference to A-A of FIG. 3. [Figure 7] It is a side sectional view of the state where the terminal portion and the plate are mounted on the housing with reference to B-B of FIG. 3. [Figure 8] It is a drawing showing the plate. [Figure 9] It is a drawing showing the state where the first rib contacts the inner surface of the housing in the state where the terminal portion is mounted on the housing. [Figure 10] It is a perspective view showing the state where the terminal portion is assembled to the plate. [Figure 11] It is a side view showing the state where the terminal portion is assembled to the plate.

Mode for Carrying Out the Invention

[0020] A direction parallel to the length direction (vertical direction) of the shaft is called the axial direction, a direction perpendicular to the axial direction centered on the shaft is called the radial direction, and a direction along a circle having a radius in the radial direction centered on the shaft is called the circumferential direction.

[0021] FIG. 1 is a drawing showing the motor according to the embodiment.

[0022] Referring to Figure 1, the motor according to this embodiment may include a rotor 100, a magnet 200, a stator 300, a cover 400, a housing 500, a busbar 600, a plate 700, and a terminal section 800. Hereinafter, "inside" refers to the direction toward the rotor 200 with respect to the radial direction of the motor, and "outside" refers to the direction opposite to the inside.

[0023] The rotor 100 may be a hollow member with one side open. In the axial direction, both ends of the rotor 100 may be rotatably supported by bearings. The rotor 100 may be divided along the axial direction into sections with different outer diameters.

[0024] The magnet 200 may be placed on the outer circumferential surface of the rotor 100.

[0025] The stator 300 is positioned 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 forms a magnetic field. The stator core 310 may be a single component or a combination of multiple divided cores. The stator core 310 may also consist of multiple plates in the form of thin steel sheets stacked on top of each other, but is not limited to this. For example, the stator core 310 may be formed as a single unit.

[0026] The cover 400 secures the magnet 200 to the rotor 100. The cover 400 surrounds the magnet 200 and a portion of the rotor 100. The cover 400 may be a molded member formed through overmolding, a can member surrounding the magnet, or an adhesive member.

[0027] The housing 500 may be positioned outside the stator 300. The housing 500 may be a cylindrical member with an open top. The housing 500 houses the rotor 100, the magnet 200, the stator 300, and the cover 400 inside. The housing 500 may also house bearings that support the rotor 100.

[0028] The busbar 600 is positioned above the stator 300. The busbar 600 connects to the coil 330 wound around the stator 300.

[0029] The plate 700 is positioned above the busbar 600. The bearing 10 is housed inside the plate 700.

[0030] The terminal section 800 is positioned above the plate 700.

[0031] Figure 2 is a diagram illustrating the busbar 600, plate 700, and terminal section 800 before coupling.

[0032] Referring to Figures 2 and 3, the busbar 600 may be located 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 member. The busbar terminal 620 may be connected to the end of the coil 330. The first terminal terminal 621 of the busbar terminal 620 is in contact with the terminal section 800. The first terminal terminal 621 is positioned longer on the upper side. The three first terminal terminals 621 may be connected to the U, V, and W phase power supplies, respectively.

[0033] The plate 700 is positioned above the busbar 600. The plate 700 may be an annular member. A bearing supporting the rotor 100 may be positioned inside the plate 700.

[0034] The terminal section 800 may include a body section 810, a power terminal 820, and a protruding section 830.

[0035] The fuselage section 810 is fixed to the plate 700 and the housing 500.

[0036] The power terminal 820 is connected to an external power supply or to a terminal on a housing cover connected to an external power supply. The power terminal 820 is fixed to the protrusion 830. The second terminal terminal 821 of the power terminal 820 is in contact with the first terminal terminal 621 of the busbar 600.

[0037] The protruding portion 830 surrounds the power terminal 820. The protruding portion 830 extends from the body portion 810 and is positioned on the plate 700. The protruding portion 830 is long enough so that the power terminal 820 is connected to an external power supply or to the terminal of a housing cover connected to an external power supply.

[0038] This terminal section 800 is separate from the busbar 600.

[0039] Figure 3 is a perspective view of the terminal section, and Figure 4 is a front view of the terminal section.

[0040] Referring to Figures 2 to 4, the protruding portion 830 extends from the body portion 810. The protruding portion 830 supports the power terminal 820, which is positioned lengthwise, and guides the power terminal 820 to the external power supply or the terminal of the housing cover connected to the external power supply.

[0041] A portion of the power terminal 820 is exposed from the tip of the protrusion 830. The protrusion 830 includes an opening 831. The opening 831 is for exposing the second power terminal terminal 821 of the power terminal 820 to the outside for fusing. With the power terminal 820 fixed to the plate 700, when the plate 700 is fixed to the housing 500, the first power terminal terminal 621 of the busbar 600 and the second power terminal terminal 821 of the terminal portion 800 are positioned to overlap so as to make surface contact at the opening 831.

[0042] Figure 5 is a diagram illustrating the fuselage section 810 of the terminal section 800.

[0043] Referring to Figure 5, the fuselage section 810 is fixed to the housing 500 and plate 700 and, together with the protrusion 830, structurally supports the power terminal 820 located on the protrusion 830. Such a fuselage section 810 may include a first fuselage 811, a second fuselage 812, and a third fuselage 813.

[0044] The first fuselage 811 is located on the plate 700. The projection 830 protrudes from the first fuselage 811. The second fuselage 812 is located below the plate 700. The third fuselage 813 connects the first fuselage 811 and the second fuselage 812. There may be multiple third fuselages 813. Multiple third fuselages 813 may be spaced apart. Between the third fuselages 813, a first hole 814 may be located, penetrating the inside and outside of the fuselage section 810. The first hole 814 is where the first projection 710 of the plate 700 is inserted.

[0045] A first rib 815 may be arranged on the first surface 801 of the body portion 810, projecting radially. The first surface 801 is the surface facing the inner circumferential surface of the housing 500. The first rib 815 is the part that contacts the inner surface 520 of the housing 500 during the process of the terminal portion 800 being fitted into the housing 500. Such a first rib 815 may be arranged to be long in the axial direction. In addition, multiple first ribs 815 may be arranged. For example, some of the multiple first ribs 815 may be arranged on one side of the first hole 814, and other parts may be arranged on the other side of the first hole 814. In addition, some of the multiple first ribs 815 may be arranged to span the first hole 814. A second rib 814c may be arranged projecting on the inner surface of the body portion 810 that forms the first hole 814. The second rib 814c contacts the first projection 710 of the plate 700 that is inserted into the first hole 814.

[0046] The fuselage portion 810 may include a second projection 816. The second projection 816 may project axially from the lower surface of the first fuselage portion 811. The second projection 816 is intended to guide the assembly direction of the terminal portion 800 during the process of assembling the terminal portion 800 to the plate 700.

[0047] Figure 6 is a side cross-sectional view illustrating the state in which the terminal section 800 and plate 700 are mounted on the housing 500, with reference to AA in Figure 3.

[0048] Referring to Figures 5 and 6, after the terminal portion 800 is assembled to the plate 700, the terminal portion 800 and the plate 700 can be mounted to the housing 500. The terminal portion 800 and the plate 700 can be mechanically joined without ultrasonic welding or additional fastening members.

[0049] With respect to the axial direction, a space is formed between the lower surface of the first fuselage 811 and the upper surface of the second fuselage 812 like a slot, and a part of the plate 700 can be inserted into this space, thereby mechanically assembling the terminal section 800 and the plate 700. Then, with the terminal section 800 coupled to the plate 700, it is mounted on a step 510 located on the inner surface 520 of the housing 500 and additionally coupled to the housing 500. Therefore, a part of the fuselage section 810 is positioned between the housing 500 and the plate 700 with respect to the radial direction.

[0050] The fuselage section 810 includes a first region S1 that overlaps with the plate 700 in the radial direction, and a second region S2 that overlaps with the plate 700 in the axial direction. The first region S1 is located on the third fuselage section 813 and is positioned outside the plate 700. The second region S2 is located on the first fuselage section 811 and the second fuselage section 812, respectively, and is positioned above and below the plate 700 with respect to the plate 700. The third fuselage section 813 can contact the inner surface 520 of the housing 500. The second fuselage section 812 is located below the plate 700 and can contact the step 510 of the housing 500.

[0051] Figure 7 is a side cross-sectional view showing the terminal section 800 and plate 700 mounted on the housing 500, with BB in Figure 3 as the reference point.

[0052] Referring to Figure 7, when the terminal portion 800 is assembled to the plate 700, the first projection 710 of the plate 700 is positioned 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 that are positioned opposite each other with respect to the axial direction. The axial distance d between the second surface 814a and the third surface 814b may be greater than the thickness t of the plate 700 and less than the height h of the body portion 810.

[0053] A first inclined surface 812a may be positioned at least one of the boundaries between the second surface 814a and the inner surface 520 of the body portion 810, or between the third surface 814b and the inner surface 520 of the body portion 810. The first inclined surface 812a expands the entrance to the first hole 814, guiding the first projection 710 of the plate 700 to slide easily into the first hole 814.

[0054] A second inclined surface 813b may also be positioned at the corner near the boundary between the lower and outer surfaces of the fuselage section 810. Such a second inclined surface 813b reduces interference between the housing 500 and the fuselage section 810 when the terminal section 800 is fixed to the plate 700 and mounted to the housing 500.

[0055] Figure 8 is a diagram illustrating plate 700.

[0056] Referring to Figure 8, the plate 700 may include a first projection 710, a second hole 720, and a third hole 730.

[0057] The first projection 710 protrudes outward from the edge of the plate 700 along a first direction F. Here, the first direction F is the direction in which the terminal portion 800 slides to be assembled onto the plate 700. The first hole 814 of the body portion 810 is also formed along the first direction F, corresponding to the protruding direction of the first projection 710. The edge 711 of the first projection 710 may be a curved surface. In this case, the center of curvature of the edge 711 of the first projection 710 may be the same as the center C of the plate 700.

[0058] The second hole 720 penetrates the plate 700 axially and is where the first projection 710 of the plate 700 is positioned. During the process of inserting the body portion 810 into the plate 700, the second projection 816 moves along the second hole 720 to guide the movement of the body portion 810. Such a second hole 720 may be formed so as to be recessed inward from the edge of the plate 700.

[0059] The second hole 720 is also positioned along the first direction F. Multiple second holes 720 may be positioned. For example, the second hole 720 may include a second-first hole 721 and a second-second hole 722, with the second-first hole 721 positioned on one side of the first projection 710 and the second-second hole 722 positioned on the other side of the second projection 816. The longitudinal direction of both the second-first hole 721 and the second-second hole 722 are parallel to the first direction F.

[0060] The third hole 730 penetrates the plate 700 axially, and is where the busbar 600 power terminal 820 passes through. When the terminal section 800 is assembled to the plate 700, the position of the third hole 730 corresponds to the position of the power terminal 820 on the terminal section 800. The first projection 710 may be positioned to overlap with the third hole 730 with respect to the first direction F.

[0061] Figure 9 is a diagram illustrating the state in which the terminal portion 800 is attached to the housing 500 and the first rib 815 is in contact with the inner surface 520 of the housing 500.

[0062] Referring to Figure 9, when the terminal portion 800 is attached to the housing 500, the first rib 815 comes into contact with the inner surface 520 of the housing 500. If the first surface 801 of the body portion 810 were to come into direct contact with the inner surface 520 of the housing 500, a gap would be created between the body portion 810 and the inner surface 520 of the housing 500, posing a risk of the terminal portion 800 flowing or detaching. However, if multiple first ribs 815 each come into contact with the inner surface 520 of the housing 500, the terminal portion 800 is prevented from flowing.

[0063] Figure 10 is a perspective view illustrating the state in which the terminal section 800 is assembled to the plate 700, and Figure 11 is a side view illustrating the state in which the terminal section 800 is assembled to the plate 700.

[0064] Figures 10(a) and 11(a) illustrate the terminal section 800 and plate 700 before assembly, with the first hole 814 of the terminal section 800 and the first projection 710 of the plate 700 aligned. Figures 10(b) and 11(b) illustrate the state in which the terminal section 800 is pushed along the first direction F and fixed to the plate 700. When the terminal section 800 is pushed along the first direction F, the first projection 710 is inserted into the first hole 814 and the terminal section 800 is coupled to the plate 700. At this time, the first projection 710 of the plate 700 moves along the first hole 814 of the plate 700, guiding the movement of the terminal section 800. When the first projection 710 is inserted into the first hole 814, the first projection 710 comes into contact with the second rib 814c. Therefore, it is possible to prevent the flow of plate 700 that may occur between the first hole 814 and the first projection 710 from being in direct contact with the second surface 814a or the third surface 814b.

[0065] In this way, since the terminal section 800 is pushed from the outside to the inside of the plate 700 with the radial direction as the reference, the terminal section 800 and the plate 700 are assembled, which has the advantage of being very simple and quick to assemble. Furthermore, with the axial direction as the reference, the first fuselage 811 and the second fuselage 812 of the terminal section 800 fix the plate 700 on the upper and lower sides, and the third fuselage 813 of the terminal section 800 restrains the plate 700 in the radial direction, so the terminal section 800 can be firmly joined to the plate 700 without the need for separate fastening members or a fusion process.

[0066] Furthermore, when the terminal portion 800 is attached to the housing 500, the inner surface 520 of the housing 500 restrains the body portion 810 of the terminal portion 800 from detaching radially. In particular, since the outer surface of the body portion 810 is in contact with the inner surface 520 of the housing 500, the structural stability is far greater than when the terminal portion 800 is assembled through fastening members or a fusion process.

[0067] The embodiments described above can be used in a variety of devices, such as those for vehicles or home appliances.

Claims

1. Housing and A stator is disposed within the housing, A rotor disposed within the stator, A busbar positioned on the stator, A plate placed on the busbar, The terminal portion includes a body portion that contacts the plate and a protruding portion that extends from the body portion and is positioned on the plate, A portion of the aforementioned body is a motor positioned radially between the housing and the plate.

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

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

4. The aforementioned body portion includes a second projection that protrudes in the axial direction, The motor according to claim 1, wherein the plate includes a second hole in which the second projection is located, the length of which is longer than the width of the plate.

5. The motor according to claim 4, wherein the body portion is positioned opposite the inner circumferential surface of the housing and includes a first surface on which the second hole is located.

6. The motor according to claim 5, wherein the body portion includes a plurality of first ribs that project radially from the first surface and contact the inner circumferential surface of the housing.

7. The motor according to claim 1, wherein the body portion includes a second rib that contacts the plate.

8. The terminal section includes a power terminal connected to the busbar terminal of the busbar, The motor according to claim 1, wherein the plate includes a third hole positioned to correspond to the location of the power terminal.

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