motor

Abstract

The present invention may provide a motor comprising: a shaft; a rotor coupled to the shaft; a stator arranged to correspond to the rotor; and a bus bar arranged on an upper side of the stator. The stator includes a stator core and a coil, the bus bar includes a terminal connected to the coil, the terminal including a body and a plurality of connection ends extending from the body to contact end portions of the coil, at least one of the plurality of connection ends including a combination of a plurality of extensions extending from the body, and the plurality of extensions contacting the same end portion of the coil.

Description

Technical Field

[0001] The present invention relates to motors. Background Art

[0002] The motor includes a rotor and a stator. A coil is wound around the stator. The connection ends of the coil wound around the stator can be connected to a bus bar. The bus bar includes a body and a terminal. The terminal is connected to the coil. The terminal includes a body and a plurality of connection ends extending from the body. The body of the terminal has a substantially curved surface, and the connection end has a shape branching out from the body. Therefore, there is a problem that the shape of the unfolded view of the plate member used to manufacture the terminal is very complicated. When the shape of the unfolded view becomes complicated, the manufacturing process is complicated, and therefore there is a problem of generating a large amount of waste during the terminal manufacturing process.

[0003] In addition, due to the bent pattern of the connection end portion, the length of the bus bar in the axial direction increases, and thus there is a problem in that the size of the motor increases. Summary of the Invention

[0004] Technical issues

[0005] The present invention is directed to providing a motor including a terminal whose manufacturing process generates a small amount of scrap.

[0006] The objects to be solved by the present invention are not limited to the above objects, and other objects not described above will be clearly understood by those skilled in the art from the following description.

[0007] Technical Solution

[0008] One aspect of the present invention provides a motor comprising: a shaft; a rotor coupled to the shaft; a stator arranged to correspond to the rotor; and a bus bar arranged above the stator, wherein the stator comprises a stator core and a coil, the bus bar comprises a terminal connected to the coil, the terminal comprises a body and a plurality of connection ends extending from the body and contacting an end portion of the coil, a plurality of extensions extending from the plurality of bodies are combined to constitute any one of the plurality of connection ends, and the plurality of extensions contact the same end portion of the coil.

[0009] Another aspect of the present invention provides a motor, comprising: a shaft; a rotor coupled to the shaft; a stator arranged to correspond to the rotor; and a bus bar arranged above the stator, wherein the stator comprises a stator core and a coil, the bus bar comprises a first terminal and a second terminal connected to the coil, the first terminal comprises a first body and a first extension extending from one end portion of the first body, the second terminal comprises a second body and a second extension extending from one end portion of the second body, and the first extension and the second extension are in contact with the same end portion of the coil.

[0010] Another aspect of the present invention provides a motor comprising: a shaft; a rotor coupled to the shaft; a stator arranged to correspond to the rotor; and a bus bar arranged above the stator, wherein the stator comprises a stator core and a coil, the bus bar comprises a first terminal and a second terminal connected to the coil, and an overlapping area of ​​the first terminal and the second terminal in an axial direction contacts the same end portion of the coil.

[0011] The widths of the plurality of bodies may be the same, and the width of the extension may be smaller than the width of the body.

[0012] The width of the connection end portion formed by the extension portion may be smaller than the width of the body.

[0013] A width of the first body may be the same as a width of the second body, a width of the first extension may be smaller than a width of the first body, and a width of the second extension may be smaller than a width of the second body.

[0014] A sum of a width of the first extension portion and a width of the second extension portion may be smaller than a width of the first body or a width of the second body.

[0015] The first extension portion and the second extension portion may be arranged to overlap in the axial direction.

[0016] The first terminal may include a third extension portion extending from the other end portion of the first body, the second terminal may include a fourth extension portion extending from the other end portion of the second body, the width of the first extension portion and the width of the second extension portion may be the same, and the width of the second extension portion and the width of the fourth extension portion may be different from each other.

[0017] The first extension portion may include a first bend portion connected to the first body and a second bend portion connected to the first bend portion, the second extension portion may include a third bend portion connected to the second body and a fourth bend portion connected to the third bend portion, the bending direction of the first bend portion and the bending direction of the third bend portion may be opposite to each other in the circumferential direction of the axis, and the bending direction of the second bend portion and the bending direction of the fourth bend portion may be the same based on the circumferential direction of the axis.

[0018] The curvature of the second curved portion and the curvature of the fourth curved portion may be the same.

[0019] A lower surface of the first extension may be in contact with an upper surface of the second extension.

[0020] The second terminal, the first terminal, and the second terminal may be sequentially arranged in a circumferential direction of the bus bar.

[0021] In the overlapping region, a lower surface of the first terminal and an upper surface of the second terminal may be in contact.

[0022] A width of the first terminal and a width of the second terminal may be the same, and a width of the overlapping region may be smaller than a width of the first terminal or a width of the second terminal.

[0023] Beneficial effects

[0024] According to the embodiment, since the present invention includes a terminal whose manufacturing process generates a small amount of scrap, the present invention provides an advantageous effect of significantly reducing manufacturing costs.

[0025] According to the embodiment, since the number of bending processes for forming the connection end portion of the terminal is reduced, there are advantageous effects in that the number of manufacturing processes is reduced and damage to the terminal can be prevented from occurring during the bending process.

[0026] According to the embodiment, since the length of the bus bar in the axial direction is reduced, the size of the motor may be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a view showing a motor according to an embodiment.

[0028] Figure 2 It is a perspective view showing a terminal of a bus bar.

[0029] Figure 3 is a view showing a first expanded pattern of a first terminal and a second expanded pattern of a second terminal.

[0030] Figure 4 is a perspective view showing the first terminal.

[0031] Figure 5 is a plan view showing the first terminal.

[0032] Figure 6 is a perspective view showing the second terminal.

[0033] Figure 7 is a plan view showing the second terminal.

[0034] Figure 8 is a view showing the first extending portion and the second extending portion which are arranged to overlap in the axial direction.

[0035] Figure 9 is a side view showing the first extension portion and the second extension portion. DETAILED DESCRIPTION

[0036] The direction parallel to the longitudinal direction (vertical direction) of the axis is called the axial direction, the direction perpendicular to the axial direction around the center of the axis is called the radial direction, and the direction along the circumference of a circle having a radius around the axis is called the circumferential direction.

[0037] Figure 1 1 is a diagram showing a motor according to an embodiment. Hereinafter, the term "inward" refers to a direction from the housing (500) toward the shaft (10) serving as the center of the motor, while the term "outward" refers to a direction opposite to "inward," that is, a direction from the shaft (10) toward the housing (50). Furthermore, the circumferential direction or radial direction is defined based on the axial center.

[0038] The shaft (10) may be coupled to the rotor (20). When electromagnetic interaction occurs between the rotor (20) and the stator (30) when current is supplied, the rotor (20) rotates, and the shaft (10) rotates together with the rotor (20).

[0039] The rotor (20) rotates due to electrical interaction with the stator (30). The rotor (20) may be arranged inside the stator (30).

[0040] The stator (30) is arranged outside the rotor (20). The stator (30) may include a stator core (30A), an insulator (30B) mounted on the stator core (30A), and a coil (30C). The coil (30C) may be wound around the insulator (30B). The insulator (30B) is arranged between the coil (30C) and the stator core (30A) and serves to electrically insulate the stator core (30A) from the coil (30C). The coil (30C) may cause electrical interaction with the magnet of the rotor (20).

[0041] A bus bar (40) is arranged above the stator (30). The bus bar (40) includes a bus bar holder (not shown) formed of an insulating material and a plurality of terminals (not shown) coupled to the bus bar holder. In this case, the bus bar holder is formed of an insulating material to prevent connection between the plurality of terminals. In addition, the plurality of terminals connect the coils (30C) wound around the stator core (30A) and apply current to the coils.

[0042] The housing (50) accommodates the rotor (20) and the stator (30).

[0043] Figure 2 This is a perspective view showing a terminal (100) of a bus bar (40).

[0044] Reference Figure 1 and Figure 2, the terminal (100) of the busbar can be a phase terminal connected to the power supply of the U phase, V phase and W phase, or a neutral terminal electrically connected to the phase terminal. The terminal (100) may include a body (100A) and a plurality of connection ends (100B) extending from the body (100A). The body may have a curved surface. The connection end (100B) is an end fused to the coil (30C). The connection end (100B) may extend to bend outward or inward from the body. The connection end (100B) may have a shape bent in a direction parallel to the direction of the axial center to surround the end portion of the coil (30C) extending upward from the lower side of the coil (30C). The terminal (100) may be fixed by a molded portion.

[0045] When the terminal (100) is manufactured from one plate member to include the connection end portion (100B), the shape of the terminal (100) in an expanded view is complicated. Therefore, in order to simplify the shape of the terminal (100) in an expanded view, in the motor according to this embodiment, a bus bar is manufactured by combining unit terminals.

[0046] The terminal (100) can be formed by combining a first terminal (110) and a second terminal (120). The first terminal (110) and the second terminal (120) can be arranged continuously in the circumferential direction of the busbar (40). For example, the first terminal (110) can be arranged between two second terminals (120) in the circumferential direction of the busbar (40). The first terminal (110) and the second terminal (120) can share a connection end (100B). This is to reduce the amount of scrap by simplifying the expansion pattern of the first terminal (110) and the second terminal (120).

[0047] The first terminal (110) may include a first body (111) and a first extension (112). The first extension (112) may be arranged at one end of the first body (111).

[0048] The second terminal (120) may include a second body (121) and a second extension (122). The second extension (122) may be disposed at one end of the second body (121).

[0049] In addition, the first terminal (110) may further include a third extension portion (113), and the second terminal (120) may further include a fourth extension portion (123). The third extension portion (113) may be arranged at the other end of the first body (111), and the fourth extension portion (123) may be arranged at the other end of the second body (121).

[0050] The first extension portion (112) and the second extension portion (122) are combined to form a connection end portion (100B) connected to the coil (30C). The first extension portion (112) and the second extension portion (122) are arranged to overlap in the axial direction.

[0051] Figure 3 It is a view showing a first expanded pattern (T1) of a first terminal (110) and a second expanded pattern (T2) of a second terminal (120).

[0052] Reference Figure 2 and Figure 3 The first expansion pattern (T1) is a portion for forming a first terminal (110) from a plate member. The second expansion pattern (T2) is a portion for forming a second terminal (120) from a plate member.

[0053] The first expansion pattern (T1) may include a first portion (1), a second portion (1a) extending from one end of the first portion (1), and a third portion (1b) extending from the first portion (1). The first portion (1) is a portion for forming the first body (111) and has a rectangular structure. The second portion (1a) and the third portion (1b) are portions constituting the first extension portion (112) and the third extension portion (113), respectively.

[0054] The second expansion pattern (T2) may include a fourth portion (2), a fifth portion (2a) extending from one end of the fourth portion (2), and a sixth portion (2b) extending from the other end of the fourth portion (2). The fourth portion (2) is a portion for forming the second body (121) and having a rectangular structure. The fifth portion (2a) is a portion for forming the second extension portion (122), and the sixth portion (2b) is a portion for forming the fourth extension portion (123).

[0055] The upper edge (1c) of the first expansion pattern (T1) and the upper edge (2c) of the second expansion pattern (T2) are arranged to be collinear with each other. In addition, the lower edge (1d) of the first expansion pattern (T1) and the lower edge (2d) of the second expansion pattern (T2) are arranged to be collinear with each other. Therefore, the width (w1) of the first expansion pattern (T1) and the width (w3) of the second expansion pattern (T2) are the same. The second portion (1a) and the fifth portion (2a) are arranged to vertically overlap.

[0056] Since such a repeated development pattern can be formed in a belt-like member having a predetermined width, the amount of waste can be significantly reduced.

[0057] Figure 4 is a perspective view showing the first terminal (110), and Figure 5 It is a plan view showing the first terminal (110).

[0058] Reference Figure 4 and Figure 5 , the first body (111) may have a curved surface. The first body (111) may be a flat member having a thickness (t1) less than a width (w1). The first body (111) may have a shape that stands upright in the axial direction. The first extension (112) and the third extension (113) are arranged at both end portions of the first body (111). The width (w2) of each of the first extension (112) and the third extension (113) is less than the width (w1) of the extension of the first body (111). This is because the width (w2) of the first extension (112) should be less than the width (w1) of the first body (111) so as to ensure that the area where the second extension (122) overlaps with the first extension (112) is in the plate member.

[0059] like Figure 5 As shown in the accompanying drawings, the first extension portion (112) can be bent outward from the end portion of the first body (111) and be arranged more outward than the first body (111). Alternatively, although not shown in the accompanying drawings, the first extension portion (112) can also be bent inward from the end portion of the first body (111) and be arranged more inward than the first body (111). For example, the first extension portion (112) can include a first bend (B1) and a second bend (B2). The first bend (B1) is connected to one end portion of the first body (111). The second bend (B2) is connected to the first bend (B1). The third extension portion (113) can include a third bend (B3) and a fourth bend (B4). The third bend (B3) is connected to the other end portion of the first body (111). The fourth bend (B4) is connected to the third bend (B3).

[0060] The direction in which the first curved portion (B1) and the direction in which the third curved portion (B3) bends may be opposite to each other. The direction in which the first curved portion (B1) and the direction in which the second curved portion (B2) bends may be the same. The direction in which the third curved portion (B3) and the direction in which the fourth curved portion (B4) bends may be different from each other.

[0061] Figure 6 is a perspective view showing the second terminal (120), and Figure 7 It is a plan view showing the second terminal (120).

[0062] Reference Figure 6 and Figure 7, the second body (121) may have a curved surface. The second body (121) may be a flat member having a thickness (t2) less than a width (w3). The second body (121) may have a shape that stands upright in the axial direction. The second extension (122) is arranged on one end portion of the second body (121). The width (w4) of the second extension (122) is less than the width (w4) of the extension of the second body (121). This is because the width (w4) of the second extension (122) should be less than the width (w3) of the extension of the second body (121) so as to ensure that the area where the first extension (112) and the second extension (122) overlap is in the plate member.

[0063] The fourth extension portion (123) is disposed on the other end portion of the second body (121). The width (w5) of the fourth extension portion (123) may be the same as the width (w3) of the second body (121).

[0064] like Figure 7 As shown in the figure, the second extension portion (122) can be bent outward from the end portion of the second body (121) and be arranged to be more outward from the second body (121). Alternatively, although not shown in the drawings, the second extension portion (122) can also be bent inward from the end portion of the second body (121) and be arranged to be more inward than the second body (121). For example, the second extension portion (122) can include a fifth bend (B5) and a sixth bend (B6). The fifth bend (B5) is connected to the second body (121). The sixth bend (B6) is connected to the fifth bend (B5). The direction in which the fifth bend (B5) bends and the direction in which the sixth bend (B6) bends can be different.

[0065] The fourth extension portion (123) may include a seventh bend (B7) and an eighth bend (B8). The seventh bend (B7) is connected to the second body (121). The eighth bend (B8) may be connected to the seventh bend (B7). The direction of the seventh bend (B7) and the direction of the eighth bend (B8) may be the same.

[0066] At the same time, the direction in which the first bent portion (B1) bends and the direction in which the fifth bent portion (B5) bends can be opposite to each other, and the direction in which the second bent portion (B2) bends and the direction in which the sixth bent portion (B6) bends can be the same. This is a structure for the first terminal (110) and the second terminal (120) that are continuously adjacent to each other to share the connection end portion (100B), and for arranging the first extension portion (112) and the second extension portion (122) to overlap in the axial direction.

[0067] Figure 8It is a view showing the first extension portion (112) and the second extension portion (122) arranged to overlap in the axial direction.

[0068] Reference Figure 3 and Figure 8 , the first extension portion (112) and the second extension portion (122) can be formed by a plate member by arranging and bending the second portion (1a) and the fifth portion (2a) so as to overlap in the axial direction. Therefore, the curvature of the second bend (B2) of the first extension portion (112) and the curvature of the sixth bend (B6) of the second extension portion (122) can be the same. In addition, since the first extension portion (112) and the second extension portion (122) are formed by a single bending process, there is an advantage of reducing the number of bending processes. Since the number of bending processes is reduced, the possibility of the coated portion of the first terminal (110) or the second terminal (120) being scratched or torn can be significantly reduced.

[0069] The end portion of the coil (30C) is arranged inside the first extension portion (112) and the second extension portion (122), and the arranged end portion of the coil (30C), the first extension portion (112), and the second extension portion (122) are fused and connected. As a result, the first extension portion (112) and the second extension portion (122) are in contact with the same end portion of the coil (30C).

[0070] After forming the first extension portion (112) and the second extension portion (122) by bending both the second portion (1a) and the fifth portion (2a), the first body (111) and the second body (121) may be formed by bending both the first portion (1) and the fourth portion (2).

[0071] In a state where the first extension portion (112) and the second extension portion (122) overlap in the axial direction, the lower surface (112a) of the first extension portion (112) and the upper surface (122a) of the second extension portion (122) may be as follows Figure 8 As shown in the figure, they are arranged to be separated from each other, and in the process of fixing the first terminal (110) and the second terminal (120) to the mold, the lower surface (112a) of the first extension portion (112) and the upper surface (122a) of the second extension portion (122) may also contact each other.

[0072] Figure 9 It is a side view showing the first extension portion (112) and the second extension portion (122).

[0073] Reference Figure 3 and Figure 9Due to the characteristics of the first expansion pattern (T1) and the second expansion pattern (T2), the width (w1) of the first body (111) and the width (w3) of the second body (121) should be the same, and the sum of the width (w2) of the first extension portion (112) and the width (w4) of the second extension portion (122) should be smaller than the width (w1) of the first body (111) or the width (w3) of the second body (121). Therefore, there is an advantage of significantly reducing the vertical length of the busbar and further reducing the size of the motor.

[0074] In the above embodiment, an example of an inner rotor type motor has been described, but the present invention is not limited thereto. The present invention can also be applied to an outer rotor type motor. In addition, the present invention can be used in various devices such as vehicles and home appliances.

Claims

1. A motor comprising: axis; a rotor coupled to the shaft; a stator arranged to correspond to the rotor; as well as a bus bar arranged above the stator, Wherein, the stator includes a stator core and a coil, The bus bar includes a plurality of terminals connected to the coil, At least one of the plurality of terminals includes a body and a plurality of connection end portions extending from the body and contacting end portions of the coil, At least one of the plurality of connection end portions is formed by axially overlapping two or more extension portions of a plurality of extension portions respectively extending from the body, Two or more of the plurality of extensions arranged to overlap in the axial direction are in contact with one of the end portions of the coil, and At least two extending portions among the plurality of extending portions have different widths in the axial direction.

2. The motor according to claim 1, wherein The plurality of extensions are arranged in a circumferential direction.

3. The motor according to claim 1, wherein: The widths of the bodies of the plurality of terminals are the same; and The width of the axially overlapping extension is smaller than the width of the body.

4. The motor according to claim 1, wherein The plurality of extensions are bent radially outward along the body, and End portions of the plurality of extensions are bent in the same direction.

5. A motor comprising: axis; a rotor coupled to the shaft; a stator arranged to correspond to the rotor; as well as a bus bar arranged above the stator, Wherein, the stator includes a stator core and a coil, The bus bar includes a plurality of terminals connected to the coil, At least one of the plurality of terminals includes a first terminal and a second terminal, The first terminal includes a first body and a first extension portion extending from one end portion of the first body. The second terminal includes a second body and a second extension portion extending from one end portion of the second body. The first extension portion and the second extension portion are in contact with one of the end portions of the coil. The first terminal includes a third extension portion extending from the other end portion of the first body, The second terminal includes a fourth extending portion extending from the other end portion of the second body, The width of the first extension portion is the same as the width of the second extension portion, The first extension portion and the second extension portion are arranged to overlap in the axial direction, and The first extension portion and the second extension portion are spaced apart in the axial direction.

6. The motor according to claim 5, wherein: The width of the first body is the same as the width of the second body; The width of the first extension portion is smaller than the width of the first body; and The width of the second extension portion is smaller than the width of the second body.

7. The motor according to claim 6, wherein A sum of a width of the first extension portion and a width of the second extension portion is smaller than a width of the first body or a width of the second body.

8. The motor according to claim 5, wherein The fourth extending portion overlaps the first extending portion, the second extending portion, and the third extending portion in a circumferential direction.

9. The motor according to claim 5, wherein: The first extension portion includes a first bent portion connected to the first body and a second bent portion connected to the first bent portion; The second extension portion includes a third bent portion connected to the second body and a fourth bent portion connected to the third bent portion; The direction in which the first curved portion is curved and the direction in which the third curved portion is curved are opposite to each other in the circumferential direction of the shaft; and A direction in which the second curved portion is bent and a direction in which the fourth curved portion is bent are the same based on the circumferential direction of the shaft.

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