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 embodiment relates to a motor. [Background technology]

[0002] The motor may 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 may be disposed on the upper side of the stator. The terminals of the bus bar may be connected to a coil wound on the stator, and the terminals of the bus bar may be connected to a terminal portion extending axially. The terminal portion is connected to an external power source.

[0003] Since the terminal portion extends long in the axial direction, the bonding strength between the mold of the terminal portion and the plate may be reduced. In order to improve the bonding strength, the protruding portion of the terminal portion that penetrates the plate may be ultrasonically fused to the plate.

[0004] However, ultrasonic welding of protrusions has problems in that it is difficult to control the fused part, and the ultrasonic welding process is complicated and there is a problem that the terminal part shakes during the welding process and becomes misaligned. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the present embodiment is intended to solve the above-mentioned problems, and an object of the present invention is to provide a motor whose terminal portion can be easily assembled.

[0006] The problems to be solved by the present invention are not limited to those 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 problem]

[0007] An embodiment for achieving the above object can 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 portion including a body portion in contact with the plate and a protrusion 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] An embodiment can 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 portion including a body portion in contact with the plate and a protrusion protruding from the body portion and protruding onto the plate, the body portion including a first region disposed so as to overlap with the plate in the radial direction, and a second region disposed so as to overlap with the plate in the axial direction, the first region being disposed radially outward of the plate.

[0009] An embodiment may provide a motor including: 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 including a body portion in contact with the plate and a protrusion protruding from the body portion and protruding onto the plate, wherein the body portion includes a first body portion disposed on the plate, a second body portion disposed below the plate, and a third body portion connecting the first body portion and the second body portion, and the third body portion is disposed outside the plate.

[0010] Preferably, the body portion may include a first hole penetrating an outer side and an inner side 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.

[0011] Preferably, the body portion may include a second protrusion protruding in an axial direction, the plate may include a second hole disposed to have a length longer than a width and in which the second protrusion is located, and a length direction of the second hole may be parallel to the first direction.

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

[0013] Preferably, the body portion may include a plurality of first ribs protruding radially from the first surface and contacting an inner circumferential surface of the housing.

[0014] Preferably, the first hole includes a second surface and a third surface disposed opposite to each other in an axial direction, an axial distance between the second surface and the third surface is greater than a thickness of the plate and less than a 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 an inner surface of the body portion may include a first inclined surface.

[0015] Preferably, the body portion may include a second rib protruding from at least one of the second surface and the third surface and contacting the plate.

[0016] Preferably, the terminal portion may include a power terminal connected to a busbar terminal of the busbar, the plate may include a third hole arranged to correspond to a position of the power terminal, and the first protrusion may be arranged to overlap the third hole in the first direction. Effect of the Invention

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

[0018] According to the embodiment, there is an advantage that the occurrence of deformation or foreign matter during the assembly process of the terminal part can be reduced. [Brief description of the drawings]

[0019] [Figure 1] 1 is a diagram illustrating a motor according to an embodiment; [Diagram 2] 1 is a diagram illustrating a bus bar, a plate, and a terminal portion before being coupled; [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] 1 is a diagram illustrating a body part of a terminal unit. [Figure 6] 4 is a side cross-sectional view showing a state in which a terminal portion and a plate are attached to a housing, taken along line AA in FIG. 3. [Figure 7] 4 is a side cross-sectional view of a state in which the terminal portion and the plate are attached to the housing, with reference to BB in FIG. 3. [Figure 8] 1 is a diagram illustrating a plate. [Figure 9] 11 is a view illustrating a state in which a first rib is in contact with an inner surface of a housing when the terminal unit is attached to the housing. [Figure 10] FIG. 4 is a perspective view illustrating a state in which a terminal portion is assembled to a plate. [Figure 11] 13 is a side view illustrating a state in which the terminal portion is assembled to the plate. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The direction parallel to the length of the shaft (up and down) is called the axial direction, the direction perpendicular to the axial direction centered on the shaft is called the radial direction, and the direction along a circle with a radial radius centered on the shaft is called the circumferential direction.

[0021] FIG. 1 is a diagram illustrating a motor according to an embodiment.

[0022] 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 unit 800. Hereinafter, the term "inner" refers to a direction toward the rotor 200 based on the radial direction of the motor, and the term "outer" refers to a direction opposite to the inner side.

[0023] 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 arranged such that portions having different outer diameters are divided along the axial direction.

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

[0025] The stator 300 is disposed outside the magnet 200. The stator 300 may include a stator core 310, an insulator 320 attached to 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 member or a combination of a plurality of divided cores. The stator core 310 may be formed of a plurality of thin steel plates stacked on top of each other, but is not necessarily limited thereto. For example, the stator core 310 may be formed as a single piece.

[0026] The cover 400 fixes 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, or may be a can member or adhesive member that surrounds the magnet.

[0027] The housing 500 may be disposed outside the stator 300. The housing 500 may be a cylindrical member with an open top. The housing 500 accommodates the rotor 100, the magnet 200, the stator 300, and the cover 400 inside. The housing 500 may also accommodate a bearing that supports the rotor 100.

[0028] The bus bar 600 is disposed on the upper side of the stator 300. The bus bar 600 connects the coils 330 wound around the stator 300.

[0029] The plate 700 is disposed above the bus bar 600. The bearing 10 is housed inside the plate 700.

[0030] The terminal portion 800 is disposed on the upper side of the plate 700 .

[0031] FIG. 2 is a diagram illustrating a bus bar 600, a plate 700, and a terminal portion 800 before being joined together.

[0032] 2 and 3, the busbar 600 may be disposed under the plate 700. The busbar 600 may include a busbar body 610 and busbar terminals 620. The busbar body 610 may be an annular molded member. The busbar terminals 620 may be connected to ends of the coils 330. A first terminal 621 of the busbar terminal 620 contacts the terminal portion 800. The first terminal 621 is disposed on the upper side and extends long. The three first terminals 621 may be connected to U-, V-, and W-phase power sources, respectively.

[0033] The plate 700 is disposed on the upper side of the bus bar 600. The plate 700 may be an annular member. A bearing that supports the rotor 100 may be disposed inside the plate 700.

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

[0035] The body 810 is secured to the plate 700 and the housing 500 .

[0036] The power supply terminal 820 is connected to an external power supply or a terminal of a housing cover that is connected to an external power supply. The power supply terminal 820 is fixed to the protrusion 830. A second terminal 821 of the power supply terminal 820 contacts a first terminal 621 of the bus bar 600.

[0037] The protrusion 830 surrounds the power terminal 820. The protrusion 830 protrudes from the body 810 and is disposed on the plate 700. The protrusion 830 is long enough to connect the power terminal 820 to an external power source or a terminal of a housing cover that is connected to an external power source.

[0038] Such a terminal portion 800 is separate from the bus bar 600 .

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

[0040] 2 to 4, the protrusion 830 protrudes from the body 810. The protrusion 830 supports the power terminal 820 arranged in the lengthwise direction and serves to guide the power terminal 820 to an external power source or a terminal of a housing cover connected to the external power source.

[0041] A part of the power terminal 820 is exposed from a tip of the protrusion 830. The protrusion 830 includes an opening 831. The opening 831 is for exposing the second power terminal 821 of the power terminal 820 to the outside for fusing. When the plate 700 is fixed to the housing 500 with the power terminal 820 fixed to the plate 700, 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 and make surface contact at the opening 831.

[0042] FIG. 5 is a diagram illustrating the body portion 810 of the terminal portion 800. As shown in FIG.

[0043] 5, the body 810 is fixed to the housing 500 and the plate 700, and together with the protrusion 830, structurally supports the power terminal 820 disposed on the protrusion 830. The body 810 may include a first body 811, a second body 812, and a third body 813.

[0044] The first body 811 is located on the plate 700. The protrusion 830 protrudes from the first body 811. The second body 812 is located below the plate 700. The third body 813 connects the first body 811 and the second body 812. There may be a plurality of third bodies 813. The plurality of third bodies 813 may be spaced apart. A first hole 814 penetrating the inside and outside of the body part 810 may be located between the third bodies 813. The first hole 814 is where the first protrusion 710 of the plate 700 is inserted.

[0045] A first rib 815 may be disposed protruding in a radial direction on a first surface 801 of the body part 810. The first surface 801 is a surface facing an inner peripheral surface of the housing 500. The first rib 815 is a portion that contacts an inner surface 520 of the housing 500 in a process in which the terminal part 800 is mounted in the housing 500. Such a first rib 815 may be disposed long in an axial direction. Also, a plurality of first ribs 815 may be disposed. For example, some of the plurality of first ribs 815 may be disposed on one side of the first hole 814, and the other part may be disposed on the other side of the first hole 814. Also, some of the plurality of first ribs 815 may be disposed across the first hole 814. A second rib 814c may be disposed protruding from an inner surface of the body part 810 forming the first hole 814. The second rib 814c contacts the first protrusion 710 of the plate 700 inserted into the first hole 814.

[0046] The body part 810 may include a second protrusion 816. The second protrusion 816 may protrude in an axial direction from a lower surface of the first body 811. The second protrusion 816 is for guiding an assembly direction of the terminal part 800 when the terminal part 800 is assembled to the plate 700.

[0047] FIG. 6 is a side cross-sectional view showing a state in which the terminal portion 800 and the plate 700 are mounted in the housing 500, taken along the line AA in FIG.

[0048] 5 and 6, after the terminal portion 800 is assembled to the plate 700, the terminal portion 800 and the plate 700 may be mounted in the housing 500. The terminal portion 800 and the plate 700 may be mechanically coupled to each other without ultrasonic welding or a separate fastening member.

[0049] A space between the lower surface of the first body 811 and the upper surface of the second body 812 is formed like a slot in the axial direction, and the terminal unit 800 and the plate 700 may be mechanically assembled in such a manner that a portion of the plate 700 is inserted into this space. The terminal unit 800 is additionally coupled to the housing 500 by being mounted on a step 510 disposed on the inner surface 520 of the housing 500 while being coupled to the plate 700. Thus, a portion of the body unit 810 is disposed between the housing 500 and the plate 700 in the radial direction.

[0050] The body portion 810 includes a first region S1 overlapping with the plate 700 in the radial direction and a second region S2 overlapping with the plate 700 in the axial direction. The first region S1 is disposed on a third body 813 and disposed outside the plate 700. The second region S2 is disposed on the first body 811 and the second body 812, respectively, and disposed above and below the plate 700 with respect to the plate 700. The third body 813 may contact the inner surface 520 of the housing 500. The second body 812 is disposed below the plate 700 and may contact the step 510 of the housing 500.

[0051] FIG. 7 is a side cross-sectional view of the terminal portion 800 and the plate 700 mounted in the housing 500, taken along the line BB in FIG.

[0052] 7, when the terminal portion 800 is assembled to the plate 700, 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 opposite to each other in 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 disposed on at least one of the boundary between the second surface 814a and the inner surface 520 of the body 810 or the boundary between the third surface 814b and the inner surface 520 of the body 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 be easily slid and inserted into the first hole 814.

[0054] A second inclined surface 813b may also be disposed at a corner near the boundary between the bottom surface and the outer surface of the body portion 810. Such a second inclined surface 813b serves to reduce interference between the housing 500 and the body portion 810 when the terminal portion 800 is attached to the housing 500 while being fixed to the plate 700.

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

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

[0057] The first protrusion 710 protrudes outward from an edge of the plate 700 in a first direction F. Here, the first direction F is a direction in which the terminal unit 800 is slid to be assembled to the plate 700. The first hole 814 of the body unit 810 is also formed along the first direction F in response to the protruding direction of the first protrusion 710. The edge 711 of the first protrusion 710 may be a curved surface. In this case, the center of curvature of the edge 711 of the first protrusion 710 may be identical to the center C of the plate 700.

[0058] The second hole 720 penetrates the plate 700 in the axial direction, and is where the first protrusion 710 of the plate 700 is disposed. When the body part 810 is inserted into the plate 700, the second protrusion 816 moves along the second hole 720 to guide the movement of the body part 810. The second hole 720 may be formed to be recessed inward from an edge of the plate 700.

[0059] The second holes 720 are also arranged along the first direction F. A plurality of second holes 720 may be arranged. For example, the second holes 720 may include a 2-1 hole 721 and a 2-2 hole 722, where the 2-1 hole 721 may be arranged on one side of the first protrusion 710 and the 2-2 hole 722 may be arranged on the other side of the second protrusion 816. The length direction of the 2-1 hole 721 and the length direction of the 2-2 hole 722 are both parallel to the first direction F.

[0060] The third hole 730 penetrates the plate 700 in the axial direction, and is a through-hole for the power terminal 820 of the bus bar 600. When the terminal unit 800 is assembled to the plate 700, the position of the third hole 730 corresponds to the position of the power terminal 820 of the terminal unit 800. The first protrusion 710 may be disposed to overlap the third hole 730 based on the first direction F.

[0061] FIG. 9 illustrates a state in which the terminal unit 800 is attached to the housing 500 and the first rib 815 is in contact with the inner surface 520 of the housing 500. As shown in FIG.

[0062] 9, when the terminal unit 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 unit 810 were in direct contact with the inner surface 520 of the housing 500, a gap would be generated between the body unit 810 and the inner surface 520 of the housing 500, which could cause the terminal unit 800 to move or come off. However, when the first ribs 815 each come into contact with the inner surface 520 of the housing 500, the terminal unit 800 is prevented from moving.

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

[0064] 10(a) and 11(a) show the terminal unit 800 and the plate 700 before they are assembled together, in which the first hole 814 of the terminal unit 800 and the first protrusion 710 of the plate 700 are aligned. FIG. 10(b) and FIG. 11(b) show the terminal unit 800 pressed along the first direction F to be fixed to the plate 700. When the terminal unit 800 is pressed along the first direction F, the first protrusion 710 is inserted into the first hole 814, and the terminal unit 800 is coupled to the plate 700. At this time, 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 unit 800. When the first protrusion 710 is inserted into the first hole 814, the first protrusion 710 comes into contact with the second rib 814c. Therefore, it is possible to prevent the plate 700 from moving between the first hole 814 and the first protrusion 710 in a state where the first protrusion 710 is in direct contact with the second surface 814a or the third surface 814b.

[0065] In this manner, since the terminal unit 800 is assembled with the plate 700 by pushing the terminal unit 800 from the outside to the inside of the plate 700 based on the radial direction, the assembly process is very simple and fast. Also, since the first body 811 and the second body 812 of the terminal unit 800 fix the plate 700 at the upper and lower sides of the plate 700 based on the axial direction, and the third body 813 of the terminal unit 800 restrains the plate 700 in the radial direction, the terminal unit 800 can be firmly coupled to the plate 700 without a separate fastening member or fusion process.

[0066] In addition, when the terminal unit 800 is attached to the housing 500, the inner surface 520 of the housing 500 restrains the body unit 810 of the terminal unit 800 from coming off in the radial direction, and in particular, since the outer surface of the body unit 810 is in contact with the inner surface 520 of the housing 500, the structural stability is much higher than when the terminal unit 800 is assembled using fastening members or a fusion process.

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

Claims

1. Housing and a stator disposed within the housing; A rotor disposed within the stator; A bus bar disposed on the stator; a plate disposed on the bus bar; a terminal portion including a body portion contacting the plate and a protrusion protruding from the body portion and disposed on the plate; a portion of the body portion is radially disposed between the housing and the plate; the body portion includes a first hole penetrating an outer side and an inner side of the body portion in a first direction; The plate includes a first protrusion protruding from an edge of the plate and disposed in the first hole.

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

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

4. The body portion includes a second projection that protrudes in the axial direction, the plate includes a second hole having a length greater than a width and in which the second protrusion is located; The motor according to claim 1 , wherein a length 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 opposite an inner circumferential surface of the housing and in which the second hole is disposed.

6. The motor according to claim 5 , wherein the body portion includes a plurality of first ribs protruding in a radial direction from the first surface and contacting an inner circumferential surface of the housing.

7. The first hole includes a second surface and a third surface disposed opposite to each other with respect to an axial direction, an axial distance between the second surface and the third surface is greater than a thickness of the plate and less than a height of the body portion; The motor of claim 1 , wherein at least one of a boundary between the second surface and the inner surface of the body and a boundary between the third surface and the inner surface of the body includes a first inclined surface.

8. The motor of claim 7 , wherein the body portion includes a second rib protruding from at least one of the second surface and the third surface and contacting the plate.

9. the terminal unit 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; The motor according to claim 1 , wherein the first protrusion is disposed so as to overlap the third hole in the first direction.

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