KR20220004312A - Busbar and motor having the same - Google Patents

Abstract

Disclosed in a motor, comprising: a stator; a rotor disposed to correspond to the stator; a shaft coupled to the rotor; and a bus bar disposed on top of the stator. The bus bar includes a bus bar body and a plurality of bus bar terminals disposed on the bus bar body. Each of the bus bar terminals includes a body portion and a power terminal portion coupled to the body portion. The body portion includes a body, a plurality of terminal portions disposed at the body, and a protrusion protruding in an axial direction from the upper surface of the body. One surface at the lower side of the power terminal portion is in contact with the inner surface of the protrusion. Accordingly, by using the bus bar terminals implemented as a combined structure of the body portion and the power terminal portion, the motor can minimize a scrap generated when the bus bar terminals are formed.

Description

Bus bar and motor including same

The embodiment relates to a bus bar and a motor including the same.

The motor may include a bus bar disposed above the stator. Here, the bus bar may include a bus bar terminal coupled to an end of a coil disposed on the stator.

The conventional bus bar terminal can form a bus bar terminal as a finished product by cutting one plate material to form a primary material that is processed primarily, and molding using a forming method of bending the primary material. However, the conventional bus bar terminal has a problem in that a lot of scrap is generated during the forming process of cutting one plate material.

In addition, one side of the conventional busbar terminal may be combined with a device such as a connector for applying an external power. Accordingly, there is a problem of improving the production cost by performing a plating process for the entire conventional bus bar terminal. Furthermore, since the plating process has to be performed in a rack plating method due to the complicated structure of the conventional bus bar terminal according to a plurality of bending moldings, there is a problem in that the production cost is further increased.

Accordingly, there is a demand for the development of a bus bar terminal structure capable of reducing the plating cost while minimizing the scrap.

The embodiment provides a bus bar that minimizes the generation of scrap using a bus bar terminal implemented through coupling of two members, and a motor including the same.

The embodiment provides a bus bar that improves the fixing force between the members by using an emboss structure when fusing between two members constituting the bus bar terminal, and a motor including the same.

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

The task is a stator; a rotor disposed to correspond to the stator; a shaft coupled to the rotor; and a bus bar disposed on the upper side of the stator, wherein the bus bar includes a bus bar body and a plurality of bus bar terminals disposed on the bus bar body, wherein the bus bar terminal is coupled to the body part and the body part and a power terminal part, wherein the body part includes a body, a plurality of terminal parts disposed on the body, and a protrusion protruding in an axial direction from an upper surface of the body, and a lower surface of the power terminal part is an inner surface of the protrusion is achieved by the motor in contact with Here, the lower end of the power terminal part may be disposed to be spaced apart from each other in the axial direction to have a predetermined distance d from the upper surface of the body.

The object includes a bus bar body coupled through a fusing process and a plurality of bus bar terminals, wherein the bus bar terminal includes a body part and a power terminal part coupled to the body part, and the body part is connected to a body and the body. It includes a plurality of terminal portions disposed, and a protrusion protruding in the axial direction from the upper surface of the body, wherein a lower surface of the power terminal unit is achieved by a bus bar in contact with an inner surface of the protrusion.

The bus bar and the motor including the same according to the embodiment may minimize scrap generated when the bus bar terminal is formed by using a bus bar terminal implemented as a structure in which a body part and a power terminal part are combined.

In addition, in the embodiment, a plating process may be performed on the entire surface of the power terminal unit, and since a plurality of power terminal units may be plated by a barrel plating method, the plating cost may be minimized.

In addition, in the embodiment, when the body and the power terminal coupled to the body are coupled through fusing, robustness of the coupling may be implemented by using an embossing.

Various and advantageous advantages and effects of the embodiments are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the embodiments.

1 is a view showing a motor according to an embodiment,
2 is a cross-sectional view showing a motor according to the embodiment,
3 is a perspective view showing a bus bar of the motor according to the embodiment;
4 is a perspective view illustrating a plurality of bus bar terminals of a bus bar disposed in a motor according to the embodiment;
5 is a plan view illustrating a plurality of bus bar terminals of a bus bar disposed in a motor according to an embodiment;
6 is an exploded view showing a body portion of a bus bar terminal disposed on a motor according to an embodiment;
7 is a perspective view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment;
8 is an exploded perspective view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment;
9 is a plan view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment;
10 is a side view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment;
11 is a cross-sectional view taken along line BB of FIG. 9;
12 is a modified example of the body portion of the bus bar terminal according to the first embodiment disposed in the motor according to the embodiment;
13 is a perspective view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment;
14 is an exploded perspective view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment;
15 is a plan view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment;
16 is a side view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment;
17 is a cross-sectional view taken along line CC of FIG. 15;
18 is a modified example of the body portion of the bus bar terminal according to the second embodiment disposed in the motor according to the embodiment;
19 is a perspective view showing a third embodiment of a bus bar terminal disposed on a motor according to the embodiment;
20 is an exploded perspective view showing a third embodiment of a bus bar terminal disposed on a motor according to the embodiment;
21 is a plan view showing a third embodiment of a bus bar terminal disposed on a motor according to the embodiment;
22 is a side view showing a third embodiment of a bus bar terminal disposed on a motor according to the embodiment;
23 is a cross-sectional view taken along line DD of FIG. 21;
24 is a diagram illustrating a power terminal unit of a bus bar terminal according to a third embodiment disposed in a motor according to the embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected between the embodiments. It can be used by combining or substituted with .

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention belongs, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention.

In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) of A and (and) B, C", it is combined as A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.

In addition, when it is described as being formed or disposed on "above (above) or under (below)" of each component, top (above) or under (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components. In addition, when expressed as "upper (upper) or lower (lower)", the meaning of not only an upper direction but also a lower direction based on one component may be included.

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 is a view showing a motor according to an embodiment, and FIG. 2 is a cross-sectional view showing a motor according to the embodiment. Here, FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 . And, in FIG. 1 , the x direction may mean a radial direction, and the y direction may mean an axial direction. In addition, the axial direction and the radial direction may be perpendicular to each other. Here, the axial direction may be a longitudinal direction of the shaft 500 .

1 and 2 , the motor 1 according to the embodiment includes a housing 100 having an opening formed on one side, a cover 200 disposed on an upper portion of the housing 100 , and an interior of the housing 100 . It may include a stator 300 disposed in the stator 300 , a rotor 400 disposed inside the stator 300 , and a shaft 500 coupled to the rotor 400 . Here, the inner side may mean a direction disposed toward the rotation center C of the motor 1 with respect to the radial direction, and the outer side may mean a direction opposite to the inner side.

In addition, the motor 1 may include a bus bar 600 disposed above the stator 300 and a sensor unit 900 for detecting rotation of the rotor 400 .

The housing 100 and the cover 200 may form the outer shape of the motor 1 . In addition, an accommodation space may be formed therein by coupling the housing 100 and the cover 200 . Accordingly, as shown in FIG. 2 , the stator 300 , the rotor 400 , the shaft 500 , the bus bar 600 , the sensor unit 900 , and the like may be disposed in the receiving space.

At this time, the shaft 500 is rotatably disposed in the receiving space. Accordingly, the motor 1 may further include bearings 10 respectively disposed on the upper and lower portions of the shaft 500 . Here, the bearing 10 disposed in the housing 100 may be referred to as a first bearing or a lower bearing, and the bearing 10 disposed in the cover 200 may be referred to as a second bearing or an upper bearing.

The housing 100 may be formed in a cylindrical shape. In addition, the housing 100 may accommodate the stator 300 , the rotor 400 , and the like therein. At this time, the shape or material of the housing 100 may be variously changed. For example, the housing 100 may be formed of a metal material that can withstand high temperatures well.

The housing 100 may include a pocket portion capable of accommodating the bearing 10 at a lower portion thereof. Here, the pocket portion of the housing 100 may be referred to as a housing pocket portion.

The cover 200 may be disposed on an opening surface of the housing 100 , that is, an upper portion of the housing 100 to cover the opening of the housing 100 .

In addition, the cover 200 may include a pocket for accommodating the bearing 10 . Here, the pocket portion of the cover 200 may be referred to as a cover pocket portion.

The stator 300 induces electrical interaction with the rotor 400 to induce rotation of the rotor 400 .

The stator 300 may be disposed inside the housing 100 . In this case, the stator 300 may be supported on the inner circumferential surface of the housing 100 . In addition, the stator 300 may be disposed outside the rotor 400 . That is, the rotor 400 may be rotatably disposed inside the stator 300 .

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

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

The stator core 310 may be formed in a form in which a plurality of plates in the form of thin steel plates are stacked on each other, but is not limited thereto. For example, the stator core 310 may be formed as a single piece.

The stator core 310 may include a yoke 311 , a plurality of teeth 312 , and a shoe 313 formed at an inner end of the tooth 312 . Here, the inner surface of the shoe 313 may be parallel to an imaginary line perpendicular to the radial direction in plan view.

The yoke 311 may be formed in a cylindrical shape. Accordingly, the yoke 311 may include a ring-shaped cross-section in plan view.

The plurality of teeth 312 may be disposed to be spaced apart from each other along the circumferential direction of the yoke 311 . Accordingly, a slot, which is a space in which the coil 330 is wound, may be formed between the respective teeth 312 .

The shoe 313 may extend to protrude inward from the inner end of the tooth 312 . Here, the width of the shoe 313 may be greater than the width of the tooth 312 .

The shoe 313 may be disposed to face the magnet 420 of the rotor 400 . In this case, the shoe 313 may be disposed to be spaced apart from the outer peripheral surface of the magnet 420 by a predetermined distance based on the radial direction. Here, the gap may be referred to as an air gap, and may be a distance between the shoe 313 and the magnet 420 in the radial direction.

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

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

The rotor 400 rotates through electrical interaction with the stator 300 . In this case, the rotor 400 may be rotatably disposed to correspond to the stator 300 .

The rotor 400 may include a rotor core 410 and a plurality of magnets 420 disposed outside the rotor core 410 . In addition, the rotor 400 may include a can disposed on the outside of the rotor core 410 to which the magnet 420 is coupled in order to prevent separation of the magnet 420 and increase the coupling force. In this case, the magnets 420 may be disposed to be spaced apart from each other at predetermined intervals along the circumferential direction on the rotor core 410 with respect to the center C.

The rotor core 410 may be implemented in a shape in which a plurality of plates in the form of thin steel plates are stacked or in the shape of a single cylinder.

In addition, a hole to which the shaft 500 is coupled may be formed in the center C of the rotor core 410 .

The magnet 420 forms a rotating magnetic field with the coil 330 wound around the stator core 310 of the stator 300 .

Accordingly, the rotor 400 rotates due to the electrical interaction between the coil 330 and the magnet 420 , and the shaft 500 rotates in conjunction with the rotation of the rotor 400 , thereby driving the motor 1 . This happens.

Here, the magnet 420 may be disposed outside the rotor core 410 to implement a surface permanent magnet (SPM) type rotor.

The can may protect the rotor core 410 and the magnet 420 from physical or chemical stimuli. Also, the can may prevent the magnet 420 from being separated from the rotor core 410 . Here, the can may be disposed to cover the magnet 420 disposed on the rotor core 410 .

The shaft 500 may be rotatably disposed inside the housing 100 by the bearing 10 . In addition, the shaft 500 may rotate together in conjunction with the rotation of the rotor 400 .

In addition, the shaft 500 may be coupled to a hole formed in the center of the rotor core 410 in a press-fit manner.

The bus bar 600 may be disposed on the stator 300 as shown in FIG. 2 . In addition, the bus bar 600 may be electrically connected to the coil 330 of the stator 300 .

3 is a perspective view illustrating a bus bar of a motor according to an embodiment, FIG. 4 is a perspective view illustrating a plurality of bus bar terminals of a bus bar disposed in a motor according to an embodiment, and FIG. It is a plan view showing a plurality of bus bar terminals of a bus bar, and FIG. 6 is an exploded view showing a body portion of a bus bar terminal disposed in a motor according to an embodiment.

3 to 5 , the bus bar 600 may include a bus bar body 700 formed of an insulating material and a plurality of bus bar terminals 800 disposed on the bus bar body 700 . .

The bus bar body 700 may be a mold formed through injection molding. Accordingly, the bus bar 600 is formed by injecting the bus bar body 700 in a state in which a plurality of the bus bar terminals 800 are arranged to be spaced apart from each other so as to have a predetermined gap G in the radial direction. can

A plurality of bus bar terminals 800 may be disposed to be spaced apart from each other in a radial direction. In addition, each of the bus bar terminals 800 may be electrically connected to the coil 330 of the stator 300 .

The bus bar terminal 800 may be formed by combining two separated members. That is, the bus bar terminal 800 may be formed by combining the body part 810 and the power terminal part 820 . Here, the body part 810 and the power terminal part 820 may be coupled through fusing.

Therefore, the bus bar terminal 800 according to the embodiment does not cut the body part and the power terminal part integrally formed from one plate like the conventional bus bar terminal at once, but only the body part 810 by cutting Since it is formed, it is possible to minimize the amount of scrap that is cut and discarded in structure.

That is, since the bus bar terminal 800 according to the embodiment forms only the body portion 810 from one plate having a predetermined thickness, the amount of scrap to be cut and discarded can be minimized. For example, as shown in FIG. 7 , since the body part 810 is formed to have a predetermined width W1, only the area corresponding to the body part 810 is cut out from one plate and the first processing is performed. It can form a tea material. Accordingly, the amount of scrap to be cut and discarded can be minimized. In addition, the body portion 810 of the bus bar terminal 800 disposed on the bus bar 600 may be formed by bending the primary material.

In addition, since the bus bar terminal 800 is formed by combining the two separated body parts 810 and power terminal parts 820, the body part 810 and the power terminal part 820 are separated from each other. and a plating process can be performed.

Conventional bus bar terminals performed a plating process in a rack plating method due to a complicated structure. Accordingly, there is a problem in that the production cost increases. Here, the rack plating method may refer to a method of plating the object to be plated by hanging it on a jig or a hook.

However, since the body part 810 and the power terminal part 820 are formed as separate members of the bus bar terminal 800, the body part 810 can be formed by cutting and bending a plate-shaped lead metal material. have. Accordingly, a plating layer may be formed on a portion of the body portion 810 , and a plating layer may not be formed on a cut surface. For example, since the body part 810 is formed by cutting a pre-plated plate-shaped material, a plating layer may not be formed on some surfaces. That is, the body portion 810 may include a non-plated surface on which plating is not formed because it is formed by forming a pre-plated plate. Here, the non-plated surface may be the cut surface formed during the cutting process of the body part 810 .

In addition, the power terminal unit 820 may cut and bend the plate-shaped material, and then separately perform a plating process using a post-plating method. In this case, the power terminal unit 820 may perform a plating process using a barrel plating method capable of plating a plurality of pieces at a time while having a low cost.

Accordingly, the bus bar terminal 800 may reduce the cost by performing plating on the entire surface of the power terminal unit 820 in order to be coupled with a connector for applying external power. That is, a plating layer may be formed on the entire surface of the power terminal unit 820 . Furthermore, since a plurality of the power terminal units 820 perform a plating process in a barrel plating method, cost can be further reduced. Here, the barrel plating method may refer to a method of plating by putting many objects to be plated in the barrel.

Referring to FIG. 5 , the plurality of bus bar terminals 800 may be disposed to be spaced apart from each other to have a predetermined gap G in the radial direction. In detail, the plurality of body portions 810 of the bus bar terminals 800 may be disposed to be spaced apart from each other so as to have a predetermined gap G in the radial direction. In this case, an inner portion of the power terminal unit 820 may be disposed to overlap (overlap) the gap G in the axial direction. However, the power terminal unit 820 may be coupled to the body unit 810 to be spaced apart from each other in the axial direction so that the plurality of bus bar terminals 800 may be physically and electrically separated from each other.

As shown in FIG. 5 , the inner end of the power terminal unit 820 of any one of the bus bar terminals 800 disposed on the outer side with respect to the radial direction among the plurality of bus bar terminals 800 is on the inner side. It may be disposed to overlap (overlap) the body portion 810 of the other disposed bus bar terminal 800 in the axial direction.

For example, the first bus bar terminal, the second bus bar terminal, and the third bus bar terminal may be disposed to be spaced apart from each other in a radial direction with respect to the center C. An inner end of the power terminal part of the second busbar terminal may be disposed to overlap the body part of the first busbar terminal in an axial direction. However, as in the case of the bus bar terminal according to the second embodiment to be described later, the protrusion formed on the body portion of the second bus bar terminal by the pressing process may be bent outwardly, thereby reducing the thickness. In this case, the body portion of the first busbar terminal and the inner end of the power terminal portion of the second busbar terminal may not overlap in the axial direction.

Busbar terminal according to the first embodiment

7 is a perspective view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment, and FIG. 8 is an exploded perspective view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment, FIG. 9 is a plan view showing a first embodiment of a bus bar terminal disposed on a motor according to an embodiment, FIG. 10 is a side view showing a first embodiment of a bus bar terminal disposed on a motor according to the embodiment, and FIG. 11 is It is sectional drawing which shows the BB line of FIG.

7 to 11 , the bus bar terminal 800 includes a body part 810 electrically connected to an end of the coil 330 and a power terminal part 820 coupled to the body part 810 . may include Here, the power terminal unit 820 may be electrically connected to a connector (not shown) provided to apply external power. Accordingly, one side of the power terminal unit 820 may be exposed to the outside through the cover 200 .

The body portion 810 may include a body 811, a terminal portion 812 coupled to the coil 330, and a protrusion 813 protruding in the axial direction from the upper surface 811a of the body 811. have. Here, the body part 810 may be formed by cutting a plate-shaped material and then bending it. Accordingly, the body 811 , the terminal part 812 , and the protrusion 813 may be integrally formed. Also, the protrusion 813 may be referred to as a first protrusion.

The body 811 may be formed in an arc shape having a predetermined curvature when viewed from the axial direction. In this case, one surface of the body 811 may be formed as a curved surface having a predetermined curvature.

A plurality of the terminal parts 812 may be formed on the upper portion of the body 811 . As shown in FIG. 1 , three terminal parts 812 may be arranged at equal intervals along the circumferential direction with respect to the center C. As shown in FIG.

Here, the terminal part 812 may be formed in a hook shape for fusing with the end of the coil 330 . In this case, the terminal part 812 may be formed to protrude in a radial direction from the upper surface 811a of the body 811 .

The protrusion 813 may be formed to extend in the axial direction from the upper surface 811a of the body 811 , and may contact one side of the power terminal unit 820 . 9 , a portion of the inner surface 813a of the protrusion 813 may contact the protrusion 813 . Here, a portion of the inner surface 813a of the protrusion 813 in contact with one side of the power terminal unit 820 may be referred to as a contact surface or a fusing surface. In addition, in consideration of rigidity and process stability due to fusing bonding, the contact surface may be 1.5 times or more of the radial thickness t of the body 811 .

The power terminal unit 820 may be formed by bending a material on a plate. In this case, one side of the power terminal unit 820 is disposed to be in contact with the protrusion 813 , and a device (not shown) capable of applying an external power such as a connector may be coupled to the other side. Accordingly, the power transmitted through the protrusion 813 may be transmitted to the coil 330 through the terminal part 812 .

8 and 11 , the power terminal unit 820 includes a first area 821 of which one surface is in contact with the protrusion 813 , and a first area 821 extending radially from an end of the first area 821 . The second region 822 may include a third region 823 extending in an axial direction from an end of the second region 822 .

The first region 821 may be formed in a plate shape disposed in the axial direction in consideration of the amount of contact with the protrusion 813 protruding from the body 811 in the axial direction. Accordingly, the outer surface 821a of the first area 821 may contact a partial area of the inner surface 813a of the protrusion 813 . In addition, the first region 821 and the protrusion 813 may be coupled to each other through a fusing process. Here, the first region 821 may be referred to as a lower end of the power terminal unit 820 .

Referring to FIG. 11 , the lower end of the first region 821 may be disposed to be spaced apart from each other in the axial direction to have a predetermined distance d from the upper surface 811a of the body 811 . Accordingly, it is possible to prevent the power terminal unit 820 of any one of the plurality of bus bar terminals 800 from coming into contact with the other body unit 810 .

The second region 822 may be disposed to extend radially from an end of the first region 821 .

In addition, the lower surface of the second region 822 may contact the upper surface of the protrusion 813 . Accordingly, the protrusion 813 may support the second region 822 , and through this, the contact amount between the body 810 and the power terminal 820 may be improved.

Here, it is assumed that the lower surface of the second region 822 is in contact with the upper surface of the protrusion 813 as an example, but the present invention is not limited thereto. For example, the lower surface of the second region 822 and the upper surface of the protrusion 813 may be disposed to be spaced apart. In this case, between the upper surface of the protrusion 813 and the second region 822 , the Some may be placed. However, during the fusing process, since the bus bar body 700 is formed before it is formed, there is a possibility that flow occurs between the body part 810 and the power terminal part 820 . Accordingly, it is preferable that the upper surface of the protrusion 813 and the lower surface of the second region 822 are in contact with each other.

The third region 823 may be disposed to extend in an axial direction from an outer end of the second region 822 . In addition, a device such as a connector for applying an external power to the third region 823 may be coupled to the third region 823 . Here, the first region 821 may be referred to as an upper end of the power terminal unit 820 .

12 is a modified example of the body portion of the bus bar terminal according to the first embodiment disposed in the motor according to the embodiment.

Referring to FIG. 12 , the body part 810 may further include a guide 814 for guiding the power terminal part 820 . Here, the guide 814 prevents the flow of the power terminal part 820 during the fusing process, thereby improving the coupling position between the body part 810 and the power terminal part 820 .

The guide 814 may be provided with two protrusions disposed on the upper surface of the protrusion 813 to be spaced apart from each other in the circumferential direction. Accordingly, the guide 814 may be referred to as a guide protrusion.

The guide protrusion may be formed to protrude from the upper surface of the protrusion 813 in the axial direction. In addition, the guide protrusion may be disposed to face the circumferential side surface of the second region 822 .

Busbar terminal according to the second embodiment

13 is a perspective view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment, and FIG. 14 is an exploded perspective view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment, FIG. 15 is a plan view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment, FIG. 16 is a side view showing a second embodiment of a bus bar terminal disposed on a motor according to the embodiment, and FIG. 17 is It is sectional drawing which shows line CC of FIG.

In describing the bus bar terminal 800a according to the second embodiment with reference to FIGS. 13 to 17 , the same components as the bus bar terminal 800 according to the first embodiment may be denoted by the same reference numerals. However, a detailed description thereof will be omitted.

When comparing the bus bar terminal 800 according to the first embodiment and the bus bar terminal 800a according to the second embodiment, there is a difference in the shape of the protrusion coupled to the power terminal unit 820 . For example, in consideration of the robustness of the coupling and the possibility of contact between the busbar terminals, the busbar terminal 800a according to the second embodiment includes the protrusion formed to have a stepped structure. 800) is different.

13 to 17 , the bus bar terminal 800a according to the second embodiment includes a body portion 810a electrically connected to an end of a coil 330 and a power terminal coupled to the body portion 810a. part 820 may be included. Here, the body portion 810a includes a body 811 , a terminal portion 812 coupled to the coil 330 , and a protrusion 815 protruding in the axial direction from the upper surface 811a of the body 811 . can do. In addition, the protrusion 815 may be referred to as a second protrusion.

Comparing the protrusion 815 with the protrusion 813 of the bus bar terminal 800 according to the first embodiment, there is a difference in that the upper end is bent outward to form a stepped structure. That is, instead of the protrusion 813 of the bus bar terminal 800 according to the first embodiment, the protrusion 815 of the bus bar terminal 800a according to the second embodiment may be disposed on the body 811 .

14 and 17 , the protrusion 815 includes a first protrusion 816 formed to extend in the axial direction from the upper surface 811a of the body 811 and an end of the first protrusion 816 on the outside It may include a second protrusion 817 extending to be bent. Accordingly, the inner surface 816a of the first protrusion 816 and the inner surface 817a of the second protrusion may be arranged to form an offset O with respect to the radial direction. In addition, a stepped structure may be formed on the protrusion 815 by the offset O.

An upper surface 816b of the first protrusion 816 may contact a lower surface of the first region 821 of the power terminal unit 820 . In addition, the first protrusion 816 may support the lower end of the power terminal unit 820 . Accordingly, the power terminal unit 820 may be disposed to be spaced apart from each other in the axial direction to have a predetermined distance d from the upper surface 811a of the body 811 .

An inner surface 817a of the second protrusion 817 may contact an outer surface 821a of the first region 821 . In addition, the first region 821 and the protrusion 815 may be coupled to each other through a fusing process. Here, the inner surface 817a of the second protrusion 817 may be the contact surface or the fusing surface described above.

An upper surface 817b of the second protrusion 817 may contact a lower surface of the second region 822 of the power terminal unit 820 . In addition, the second protrusion 817 may support the second region 822 , and through this, the contact amount between the body 810 and the power terminal 820 may be improved.

Meanwhile, a radial thickness t2 of the second protrusion 817 may be smaller than a radial thickness t1 of the first protrusion 816 . For example, the radial thickness t2 of the second protrusion 817 may be reduced through a forming process such as a pressing process. Accordingly, the proportion of the second protrusion 817 and the power terminal 820 in the radial direction is reduced by the fusing process, thereby reducing the possibility of contact with the other bus bar terminals 800a.

18 is a modified example of the body portion of the bus bar terminal according to the second embodiment arranged in the motor according to the embodiment.

Referring to FIG. 18 , the body part 810a may further include a guide 814 for guiding the power terminal part 820 .

The guide 814 may be provided as two protrusions disposed to be spaced apart from each other in the circumferential direction on the upper surface of the upper surface 817b of the second protrusion 817 . Accordingly, the guide 814 may be referred to as a guide protrusion.

The guide protrusion may be formed to protrude in the axial direction from the upper surface 817b of the second protrusion 817 . In addition, the guide protrusion may be disposed to face the circumferential side surface of the second region 822 .

Busbar terminal according to the third embodiment

19 is a perspective view showing a third embodiment of a bus bar terminal disposed on a motor according to the embodiment, and FIG. 20 is an exploded perspective view showing a third embodiment of a bus bar terminal disposed on a motor according to the embodiment, FIG. 21 is a plan view showing a third embodiment of a busbar terminal disposed on a motor according to the embodiment, FIG. 22 is a side view showing a third embodiment of a busbar terminal disposed on a motor according to the embodiment, and FIG. 23 is 21 is a cross-sectional view taken along line DD, and FIG. 24 is a view showing a power terminal unit of a bus bar terminal according to a third embodiment disposed in a motor according to the embodiment.

In describing the bus bar terminal 800b according to the third embodiment with reference to FIGS. 19 to 24 , the same components as those of the bus bar terminal 800 according to the first embodiment may be denoted by the same reference numerals. However, a detailed description thereof will be omitted.

When comparing the bus bar terminal 800 according to the first embodiment and the bus bar terminal 800b according to the third embodiment, there is a difference in the shape of the power terminal part coupled to the body part 810 . For example, in consideration of the robustness of the coupling by the fusing process, the power terminal portion 820a of the busbar terminal 800b according to the third embodiment includes the embossed structure of the busbar terminal according to the first embodiment ( 800) is different.

19 to 24 , the bus bar terminal 800b according to the third embodiment includes a body 810 electrically connected to an end of a coil 330 and a power terminal coupled to the body 810 . A portion 820a may be included.

Here, the power terminal unit 820a includes a first region 821 , a second region 822 extending in a radial direction from an end of the first region 821 , and an axis at an end of the second region 822 . It may include a third region 823 extending in the direction and an embossing 824 formed to protrude in a radial direction from the outer surface 821a of the first region 821 .

The embossing 824 may be formed to protrude in a radial direction toward the protrusion 813 . In addition, the embossing 824 may be disposed in contact with the inner surface 813a of the protrusion 813 .

The embossing 824 may be formed in a molding method in which a portion of the outer surface 821a protrudes by pressing the inner surface of the first region 821 .

24, the embossing 824 may be formed in a hemispherical shape. Accordingly, the embossing 824 may be in point contact with the inner surface 813a of the protrusion 813 . Therefore, during the fusing process, the current density increases at the contact point P between the protrusion 813 and the embossing 824 , and the fusing process starts from the contact point P, so that the body 810 and the power terminal unit The fixation force between the 820a is improved.

In the description of the bus bar terminal 800b according to the third embodiment, the body portion 810 of the bus bar terminal 800 according to the first embodiment is described based on the description, but is not necessarily limited thereto. For example, it goes without saying that the body part 810a of the busbar terminal 800a according to the second embodiment may be applied instead of the body part 810 of the busbar terminal 800 according to the first embodiment.

The sensor unit 900 detects the magnetic force of the sensing magnet installed so as to be rotationally interlocked with the rotor 400 to detect the current position of the rotor 400 to detect the rotation of the shaft 500 .

The sensor unit 900 may include a sensing magnet assembly 910 and a printed circuit board (PCB, 920 ).

The sensing magnet assembly 910 is coupled to the shaft 500 to interwork with the rotor 400 to detect the position of the rotor 400 . In this case, the sensing magnet assembly 910 may include a sensing magnet and a sensing plate.

The sensing magnet may include a main magnet disposed in a circumferential direction adjacent to a hole forming an inner circumferential surface and a sub magnet formed at an edge thereof.

The main magnet may be arranged in the same manner as the drive magnet inserted into the rotor 400 of the motor.

The sub-magnet may be formed to have more poles than the main magnet. Accordingly, the sub-magnet makes it possible to divide and measure the rotation angle more precisely, and it is possible to induce the motor to be driven more smoothly.

The sensing plate may be formed of a metal material in the form of a disk. A sensing magnet may be coupled to the upper surface of the sensing plate. And the sensing plate may be coupled to the shaft 500 . Here, a hole through which the shaft 500 passes may be formed in the sensing plate.

A sensor for detecting the magnetic force of the sensing magnet may be disposed on the printed circuit board 920 . Here, the sensor may be provided as a Hall IC. In addition, the sensor may generate a sensing signal by detecting a change in the N pole and the S pole of the sensing magnet. Accordingly, the printed circuit board 920 on which the Hall IC is disposed may be referred to as a sensing assembly or a position sensing device.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

1: motor
100: housing 200: cover
300: stator 310: stator core
330: coil
400: rotor
410: rotor core 420: magnet
500: shaft
600: bus bar
700: bus bar body
800: bus bar terminal
810: body part 811: body
812: terminal portion 813, 815: projection
814: guide
820: power terminal 824: emboss
900: sensor unit

Claims (18)

stator;
a rotor disposed to correspond to the stator;
a shaft coupled to the rotor; and
and a bus bar disposed on the upper side of the stator,
The bus bar includes a bus bar body and a plurality of bus bar terminals disposed on the bus bar body,
The bus bar terminal includes a body part and a power terminal part coupled to the body part,
The body portion includes a body, a plurality of terminal portions disposed on the body, and a protrusion protruding in the axial direction from the upper surface of the body,
A lower surface of the power terminal part is in contact with the inner surface of the protrusion. According to claim 1,
The lower end of the power terminal unit is disposed to be spaced apart from each other in the axial direction to have a predetermined distance (d) from the upper surface of the body. 3. The method of claim 2,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction at the end of the second area including a third region extending to
The outer surface of the first region is in contact with the inner surface of the projection,
A lower surface of the second region is in contact with an upper surface of the protrusion. 3. The method of claim 2,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction from the end of the second area an extended third region, and an emboss protruding from an outer surface of the first region,
The emboss is in contact with the inner surface of the protrusion,
A lower surface of the second region is in contact with an upper surface of the protrusion. 5. The method of claim 4,
The embossed motor is formed in a hemispherical shape and is in point contact with the inner surface of the protrusion. 3. The method of claim 2,
The protrusion includes a first protrusion formed to extend in the axial direction from the upper surface of the body and a second protrusion extending to be bent outwardly from an end of the first protrusion,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction at the end of the second area including a third region extending to
An inner surface of the second protrusion is in contact with an outer surface of the first region. 3. The method of claim 2,
The protrusion includes a first protrusion formed to extend in the axial direction from the upper surface of the body and a second protrusion extending to be bent outwardly from an end of the first protrusion,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction from the end of the second area an extended third region, and an emboss protruding from an outer surface of the first region,
The embossing motor is in contact with the inner surface of the second protrusion. 8. The method of claim 7,
The embossed motor is formed in a hemispherical shape and is in point contact with the inner surface of the second protrusion. 8. The method according to claim 6 or 7,
A radial thickness t2 of the second protrusion is smaller than a radial thickness t1 of the first protrusion. According to claim 1,
The protrusion further includes a guide for guiding the power terminal unit. 11. The method of claim 10,
The guide is provided with two protrusions arranged to be spaced apart from each other in the circumferential direction on the upper surface of the protrusion. According to claim 1,
The body portions of each of the plurality of bus bar terminals are disposed to be spaced apart from each other to have a predetermined gap G in the radial direction,
An inner portion of the power terminal portion is disposed to overlap the gap (G) in the axial direction. According to claim 1,
The body portion includes a non-plated surface,
The power terminal portion is a motor whose front surface is plated. a bus bar body and a plurality of bus bar terminals;
The bus bar terminal includes a body part and a power terminal part coupled to the body part,
The body portion includes a body, a plurality of terminal portions disposed on the body, and a protrusion protruding in the axial direction from the upper surface of the body,
A lower surface of the power terminal unit is a bus bar in contact with an inner surface of the protrusion. 15. The method of claim 14,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction at the end of the second area including a third region extending to
The outer surface of the first region is in contact with the inner surface of the projection,
A lower surface of the second region is in contact with an upper surface of the protrusion. 15. The method of claim 14,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction from the end of the second area an extended third region, and an emboss protruding from an outer surface of the first region,
The embossing, which is formed in a hemispherical shape, is in point contact with the inner surface of the protrusion. 15. The method of claim 14,
The protrusion includes a first protrusion formed to extend in the axial direction from the upper surface of the body and a second protrusion extending to be bent outwardly from an end of the first protrusion,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction at the end of the second area including a third region extending to
An inner surface of the second protrusion is in contact with an outer surface of the first region. 15. The method of claim 14,
The protrusion includes a first protrusion formed to extend in the axial direction from the upper surface of the body and a second protrusion extending to be bent outwardly from an end of the first protrusion,
The power terminal part includes a first area spaced apart from the upper surface of the body by a predetermined distance d, a second area extending in a radial direction from an end of the first area, and an axial direction from the end of the second area an extended third region, and an emboss protruding from an outer surface of the first region,
The embossing, which is formed in a hemispherical shape, is in point contact with the inner surface of the second protrusion.

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