KR102022005B1 - Brushless motor apparatus provided with improved assembly structure between insulation holder and electric terminal - Google Patents

Abstract

A brushless motor apparatus with an improved assembly structure of an insulation holder and an electric terminal comprises: a control unit installed in a stator housing in a printed circuit board form; a magnetic field unit arranged on the outside of the stator housing and fixed on the stator housing; and an electric terminal to electrically connect the magnetic field unit and the control unit. The electric terminal includes: a body; a first connection pin extended from the body in a pillar form to be electrically connected to the control unit; a first support unit extended from the body in a direction perpendicular to the first connection pin and supported in contact with an insulation holder coupled to the magnetic field unit; a second connection pin extended from an end of the first support unit in a direction opposite to the first connection pin to penetrate the insulation holder; and a pair of second support units extended from the body in a direction opposite to the first support unit, supported in contact with the insulation holder, and arranged on both sides of the first support unit with respect to the first support unit. The insulation holder includes a protrusion support unit protruding outwards from a lower surface of the insulation holder to be supported in contact with the first support unit and the second support units.

Description

Brushless motor apparatus provided with improved assembly structure between insulation holder and electric terminal}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor device, and more particularly, to an assembly structure of an electrical terminal and an insulating holder for accommodating a core of a magnetic field constituting a stator of a brushless motor device.

In general, a motor is a device that converts electrical energy into mechanical energy. Motors are widely used in household appliances as well as industrial equipment. Motors are largely divided into a DC motor and an AC motor. DC motors include a type of rotating a rotor by supplying power to a commutator by a brush and a brushless type of motor that does not use a brush.

Recently, such a brushless motor has been applied to a fan motor of an automobile. Brushless motors have an advantage of greater output than motors having a brushed structure, and thus the trend of being used as a motor for cooling a vehicle of a large capacity fan is increasing. An example of such a brushless motor is disclosed in Korean Patent Laid-Open Publication No. 2002-0066674.

Brushless motors generally include stators and rotors. The rotor of the brushless motor includes a permanent magnet. The stator of the brushless motor includes a magnetic field unit including a core generating a magnetic force and a winding coil, and a control unit supplying electricity to the winding coil. The control unit is typically configured in the form of a printed circuit board. Since a minute DC current flows in the control unit, a fatal damage is caused when water or the like is introduced. Therefore, the brushless motor is a printed circuit board constituting the control unit is installed inside the stator housing is manufactured independently of the magnetic field unit so that moisture does not flow into the control unit through a terminal connecting the magnetic field unit and the control unit. The stator housing is sealed by a cover so that moisture does not flow in from the outside.

The magnetic field unit includes a core formed by cutting a plurality of cutouts and being laminated, an insulation holder accommodating the core, a coil wound around the insulation holder, and an electrical terminal electrically connected to one end of the coil.

The electrical terminal is first assembled in an insulated holder and then the coil is wound around the core and then electrically connected to the electrical terminal. Typically the electrical terminal comprises a coil fixture on which the coil is caught when the coil is wound a plurality of times.

However, a force is applied to the coil adjusting unit by the tension of the coil in the process of winding the coil. In this case, in the conventional structure, the fixing position of the electrical terminal is changed during the winding of the coil, so that a process of connecting the subsequent control unit and the electrical terminal does not proceed smoothly.

An object of the present invention is to solve the problems described above, the assembly structure of the electrical terminal and the insulating holder by improving the assembly structure of the brushless motor device so that the position of the electrical terminal does not change in the process of winding the coil The present invention provides a brushless motor device that reduces time, improves assembly, and eliminates assembly dimension management of an electrical terminal.

In order to achieve the above object, a brushless motor device having an improved assembly structure of an insulating holder and an electrical terminal according to an embodiment of the present invention includes a control unit installed in a stator housing in the form of a printed circuit board;
A magnetic field unit disposed outside the stator housing and fixed to the stator housing; And
In the brushless motor device comprising an electrical terminal for electrically connecting the magnetic field unit and the control unit,
The electrical terminal includes a body;
A first connection pin extending from the body in the form of a column and electrically connected to the controller;
A first support part extending from the body in a direction perpendicular to the first connecting pin and supported by an insulating holder coupled to the magnetic field part;
A second connecting pin extending from an end of the first support part in a direction opposite to the first connecting pin and penetrating the insulating holder; And
And a pair of second support parts extending from the body in the opposite direction to the first support part and supported by the insulating holder and disposed on both sides of the first support part with respect to the first support part.
The insulating holder is characterized in that it comprises a protruding support protruding outward from the lower surface of the insulating holder to be in contact with the first support and the second support.

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Preferably, the end portion of the second support portion is bent and includes a coil catching portion extending in a direction further away from the first connecting pin.

And a third support part extending from opposite ends of the body in the opposite direction to the first connection pin and having a free end bent in a direction perpendicular to the first connection pin and the first support part to be in contact with and supported by the insulating holder. desirable.

It includes a fixing protrusion formed in the form of a column from the projecting support,

The fixing protrusion is preferably coupled to the fixing hole formed in the first support portion.

And side flow preventing grooves disposed on both sides of the protruding support part and formed in a valley shape to accommodate the end of the third support part and having one side of the open groove part.

In the brushless motor device having an improved assembly structure of the insulating holder and the electric terminal according to the present invention, even if the coil is wound on the core while the electric terminal is assembled to the insulating holder, the electric terminals are respectively wound. It is formed in the other direction and is firmly supported by the first support part, the second support part and the third support part which are in contact with and supported by the insulating holder, so that the position of the electric terminal is not changed, thereby reducing assembly time and improving assembly performance. Provide effect.

1 is a perspective view of a brushless motor apparatus according to a preferred embodiment of the present invention.
FIG. 2 is an exploded perspective view of the brushless motor device shown in FIG. 1. FIG.
FIG. 3 is a view illustrating a coupling structure of the insulating holder and the electrical terminal illustrated in FIG. 1.
4 is a view of the structure shown in FIG. 3 viewed from another direction.
5 is a view showing the structure of the electrical terminal shown in FIG.
FIG. 6 is a view illustrating a structure of a protrusion support of the insulating holder illustrated in FIG. 3.
FIG. 7 is a sectional view taken along line VIII-VIII in FIG. 4.
FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 4.
FIG. 9 is a sectional view taken along line VIII-VIII in FIG. 4. FIG.

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

1 is a perspective view of a brushless motor apparatus according to a preferred embodiment of the present invention. FIG. 2 is an exploded perspective view of the brushless motor device shown in FIG. 1. FIG. FIG. 3 is a view illustrating a coupling structure of the insulating holder and the electrical terminal illustrated in FIG. 1. 4 is a view of the structure shown in FIG. 3 viewed from another direction. 5 is a view showing the structure of the electrical terminal shown in FIG. FIG. 6 is a view illustrating a structure of a protrusion support of the insulating holder illustrated in FIG. 3. FIG. 7 is a sectional view taken along line VIII-VIII in FIG. 4. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 4. FIG. 9 is a sectional view taken along line VIII-VIII in FIG. 4. FIG.

1 to 9, the brushless motor device 10 (hereinafter referred to as “brushless motor device”) having an improved assembly structure of the insulating holder and the electric terminal according to the preferred embodiment of the present invention is a stator 20. And a rotor (not shown).

The rotor is rotatably coupled to the stator 20. The rotor includes a plurality of permanent magnets. Since the rotor may employ a conventional rotor structure, detailed description thereof will be omitted.

The stator 20 includes a control unit 40 and a magnetic field unit 60.

The controller 40 is installed inside the stator housing 30. The stator housing 30 may be manufactured by die casting an aluminum alloy.

The controller 40 may be configured in the form of a printed circuit board. The stator housing 30 may have a structure in which one surface is open. The stator housing 30 may be closed and sealed by a surface opened by the stator cover 50.

The magnetic field unit 60 is disposed outside the stator housing 30. The magnetic field unit 60 may be fixed to an upper surface of the stator housing 30. The magnetic field unit 60 includes a core 70, a coil (not shown) wound around the core 70, and an insulation holder 80. The magnetic field unit 60 may be mechanically fixed to the stator housing 30 by a member such as a bolt 200. An upper surface of the stator housing 30 is provided with a sealing member 35 to prevent moisture from entering the control unit 40 through the electrical terminal 90.

The core 70 is configured by cutting a carbon steel sheet and a plurality of stacked forms. The core is assembled into a structure in a form accommodated in the insulating holder 80.

An electrical terminal 90 is connected to one end of the coil constituting the magnetic field unit 60. The electrical terminal 90 is a component that electrically connects the magnetic field unit 60 and the control unit 40. The electrical terminal 90 is first assembled to an insulating holder 80.

The electrical terminal 90 includes a body 92, a first connecting pin 94, a first support part 96, a second connection pin 98, a second support part 100, and a third support part. 104.

The body 92 is the portion that becomes the center of the electrical terminal 90. The body 92 may be made of any one material of copper, aluminum, and carbon steel, which is an electrically good conductor.

The first connecting pin 94 extends in the form of a column from the body 92. The first connection pin 94 is a member that electrically connects the magnetic field unit 60 to the control unit 40.

The first support part 96 extends from the body 92 in a direction perpendicular to the first connection pin 94. The first support part 96 is in contact with and supported by the insulating holder 80. More specifically, the first support part 96 is in contact with and supported on the lower surface of the protruding support part 82 provided in the insulating holder 80 described later. A fixing hole 97 is formed in the first support part 96. The fixing hole 97 penetrates the upper and lower surfaces of the first support part 96.

The second connecting pin 98 is formed by bending from an end of the first support part 96. The second connecting pin 98 extends in the opposite direction to the first connecting pin 94. The second connection pin 98 is disposed to penetrate the insulation holder 80.

The second support part 100 extends from the body 92 in a direction opposite to the first support part 96. The second support part 100 is in contact with and supported by the insulating holder 80. The second support part 100 is disposed on both sides of the first support part 96 based on the first support part 96. That is, the second support part 100 is provided with a pair.

The end of the second support portion 100 is bent and extended to form a coil engaging portion 102. The coil catching part 102 extends in a direction further from the first connecting pin 94 due to the end of the second supporting part being bent. The coil catching part 102 is a part which hangs and fixes the coil when the coil is wound around the core 70.

The third support part 104 extends in opposite directions of the first connecting pin 94 from both ends of the body 92. The free end of the third support part 104 is bent in a direction perpendicular to the first connecting pin 94 and the first support part 96. The third support part 104 is in contact with and supported by the insulating holder 80.

The insulating holder 80 is a structure for receiving the core 70. The insulating holder 80 has a form similar to the cross-sectional structure of the core. A hole is formed in the center of the insulating holder 80 so that the rotating shaft passes therethrough. The insulating holder 80 is provided on the upper and lower portions of the core 70, respectively. The insulating holder 80 referred to in the present embodiment will only describe those provided in the lower portion of the core 70.

The insulating holder includes a protruding support 82, a fixing protrusion 84, a side flow preventing groove 86, and a terminal assembly guide 88.

The protruding support portion 82 further protrudes downward from the lower surface of the insulating holder 80 to form a base end shape. The protruding support portion 82 is in contact with the first support portion 96 and the second support portion 100. The protruding support 82 also serves to reinforce rigidity by having a relatively thick thickness. The first support part 96 and the second support part 100 are respectively supported in contact with the protruding support part 82 to prevent the front, rear, left, and right flow in the state in which the electrical terminal 90 is assembled to the insulating holder 80. It performs the function.

The fixing protrusion 84 is a structure protruding in the form of a pillar from the protruding support 82. The fixing protrusion 84 is coupled to a fixing hole 97 formed in the first support portion 96 of the electrical terminal 90. As the fixing protrusion 84 and the fixing hole 97 are coupled, the electrical terminal 90 is more firmly coupled to the insulating holder 80. In addition, the cross section of the fixing protrusion 84 forms a polygonal structure to prevent the electrical terminal 90 from being rotated in the assembled state to the insulating holder 80.

The side flow preventing groove 86 is configured to have a portion of the protruding support portion 82 recessed. The side flow preventing grooves 86 are disposed at both sides of the protruding support 82. The side flow prevention groove 86 is formed in a valley shape so that the end of the third support portion 104 is accommodated. The side flow preventing groove 86 is a groove part of which one side is open. The side flow preventing groove 86 functions to more reliably prevent left and right flow in a state where the electrical terminal 90 is assembled to the insulating holder 80. When the electrical terminal 90 and the insulating holder 80 are combined by insert injection, the side flow preventing groove 86 is configured to be filled so that the third support part 104 prevents the side flow. It may be in the form buried in the groove (86).

The terminal assembly guide 88 may face the boundary between the body 92 and the first support part 96 when assembling the electrical terminal 90 to the insulating holder 80 to remove the electrical terminal 90. It is a bank-like structure that slightly protrudes from the protruding support 82 to be easily assembled in position.

Hereinafter, the operation and effect of the present invention will be described in detail with reference to a process of winding a coil in the magnetic field unit 60 of the brushless motor device 10 including the components described above.

In order to form the magnetic field unit 60, the core 70 stacks a plurality of cut carbon steel sheets. The stacked cores 70 are housed in an insulating holder 80. The electrical terminal 90 is assembled to the insulating holder 80. The electrical terminal 90 is assembled such that the second connecting pin 98 passes through a hole formed in the insulating holder 80. In addition, the fixing hole 97 formed in the first support part 96 is coupled to the fixing protrusion 84 provided in the insulating holder 80. In this case, since the first support part 96 and the second support part 100 are disposed in opposite directions with respect to the body 92, the flow of the front and rear directions of the electrical terminal 90 is prevented. In particular, as shown in the embodiment, the protruding support portion 82 is formed in a proximal end form compared to other portions of the insulating holder 80 so that the first support portion 96 and the second support portion 100 are the insulation holder 80. Not firmly supported. In addition, since the third support part 104 is supported by the insulating holder 80 in a state of being accommodated in the side flow preventing groove 86 formed in a valley shape, the electrical terminal 90 is prevented from flowing in the left and right directions. . As described above, the electrical support 90 prevents the first support 96 and the second support 100 from moving forward and backward in the state in which the electrical terminal 90 is assembled to the insulating holder 80. By preventing the flow in the left and right directions, flow in the front, rear, left and right directions does not occur. In this state, a coil is wound around the core 70. The coil is repeatedly caught by the coil catching part 102 while the coil is wound around the core 70. Accordingly, a considerable amount of tension acts on the coil latch 102. However, since the electrical terminal 90 is firmly supported by the first support part 96, the second support part 100, and the third support part 104 in different directions, the flow does not occur and thus the position is changed. It does not remain. In this way, the electrical terminal 90 is not changed in position during the winding of the coil, thereby reducing the winding time of the coil. In addition, as the position of the electric terminal 90 does not flow, assemblability is improved. Accordingly, since the position of the electric terminal 90 is kept constant even during the assembly of the electric terminal 90 and the control unit 40, which is a subsequent process, it is not necessary to adjust the position of the electric terminal 90 during assembly. Therefore, the productivity is improved. On the other hand, when the electrical terminal 90 and the insulating holder 80 is combined by insert injection molding, the process of assembling the electrical terminal 90 to the insulating holder 80 may be omitted.

As such, the brushless motor device having an improved assembly structure between the insulating holder and the electrical terminal according to the present invention may be applied to the electrical terminal even when the coil is wound on the core when the electrical terminal is assembled to the insulating holder. They are formed in different directions and firmly supported by the first support part, the second support part, and the third support part which are in contact with and supported by the insulating holder, so that the position of the electrical terminal is not changed, thereby reducing assembly time and assembling performance. Provides an improved effect.

As mentioned above, although the present invention has been described with reference to preferred embodiments, the present invention is not limited to such an example, and various forms of embodiments may be embodied within the scope without departing from the technical spirit of the present invention.

10: brushless motor unit
20: stator
30: stator housing
35: sealing member
40: control unit
50: Stator Cover
60: magnetic field
70: core
80: insulated holder
82: protruding support
84: fixing protrusion
86: side flow preventing groove
88: Terminal Assembly Guide
90: electrical terminal
92: body
94: first connecting pin
96: first support part
97: fixing hole
98: second connection pin
100: second support
102: coil catching part
104: third support part
200: bolts

Claims (5)

A control unit installed in the stator housing in the form of a printed circuit board;
A magnetic field unit disposed outside the stator housing and fixed to the stator housing; And
In the brushless motor device comprising an electrical terminal for electrically connecting the magnetic field unit and the control unit,
The electrical terminal includes a body;
A first connection pin extending from the body in the form of a column and electrically connected to the controller;
A first support part extending from the body in a direction perpendicular to the first connecting pin and supported by an insulating holder coupled to the magnetic field part;
A second connecting pin extending from an end of the first support part in a direction opposite to the first connecting pin and penetrating the insulating holder; And
And a pair of second support parts extending from the body in the opposite direction to the first support part and supported by the insulating holder and disposed on both sides of the first support part with respect to the first support part.
The insulated holder includes a protruding support protruding outward from a lower surface of the insulated holder so as to be in contact with the first support and the second support. . The method of claim 1,
And an end portion of the second support portion bent to include a coil engaging portion extending in a direction further away from the first connection pin. The method of claim 1,
And a third support part extending from opposite ends of the body in the opposite direction of the first connection pin and having a free end bent in a direction perpendicular to the first connection pin and the first support part to be in contact with and supported by the insulating holder. Brushless motor device with improved assembly structure of the electric terminal. The method of claim 1,
It includes a fixing protrusion formed in the form of a column from the projecting support,
The fixing projection is an improved brushless motor device of the electrical terminal assembly structure, characterized in that coupled to the fixing hole formed in the first support. The method of claim 3,
Brushless arrangement of the electrical terminal is improved, characterized in that it is disposed on both sides of the protruding support portion and formed in a valley shape so that the end of the third support portion is accommodated, the side flow preventing groove which is an open side of one side; Motor gear.

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