KR102226263B1 - Emc filter with electric parking brake actuator assembly - Google Patents

Abstract

The present invention relates to an EMC filter of an electronic parking brake actuator assembly. The present invention includes: an inner housing (20) where a motor terminal (23) is insert-injected and a brush card unit (22) is integrally formed with a brush assembly (30) installed so as to be electrically connected to the motor terminal (23); and a motor assembly (10) coupled and electrically connected to the brush card unit (22). A ground line (L4) of an EMC filter (33) provided in the brush assembly (30) is seated in a ground groove (22n) formed in the outer surface of the brush card unit (22) and pressurized by the motor assembly (10). According to the present invention, the ground groove is formed in the outer surface of the side wall of the brush card unit and the ground line does not protrude to the outer surface of the brush card unit. As a result, no lifting occurs when a yoke is coupled to the brush card unit. Accordingly, there are effects of reducing a ground defect rate and increasing coupling stability. In addition, the ground line is prevented from being damaged during a stacking process of coupling the yoke and the brush card unit.

Description

EMC filter of electronic parking brake actuator assembly {EMC FILTER WITH ELECTRIC PARKING BRAKE ACTUATOR ASSEMBLY}

The present invention relates to an EMC filter used in an electronic runner brake actuator assembly, and more particularly, to a grounding structure of an EMC filter installed on a brush card.

An electronic parking brake actuator assembly (hereinafter, EPB actuator assembly) of a vehicle is for operating a friction pad installed on a caliper of a disc brake device during parking. Electronic parking brake It is automatically operated through the user's switch operation, and for this, it is composed of an electronic parking brake motor and a gear assembly (power transmission device) for transmitting the power of the motor. In this form of use of the electronic parking brake, when the driver presses the parking brake switch, the rotational force of the motor of the actuator is transmitted to the input shaft of the caliper through an assembly (power transmission device) such as a reduction device. When the input shaft receiving power is rotated, the pressure connection sleeve moves forward, and the piston and the caliper housing accommodating it move toward each other by the advancement of the connection sleeve. In addition, the piston and the two friction pads mounted on the caliper housing press both sides of the disk and restrain it so that it cannot rotate, thereby making parking.

Power is applied to the actuator from the outside, and a connector part for receiving power is installed on one side of the actuator. There is a connector terminal in the connector part, and the connector terminal is supplied with power by combining with the motor terminal connected to the motor.

In addition to the actuator assembly as described above, numerous electronic devices such as a generator and a control device are installed inside the vehicle. When the electronic devices are operated, noise is generated, which disturbs signals of other electronic devices and damages electronic components installed inside the electronic devices.

In addition, not only inside the vehicle, but also when the vehicle stays or passes in a place where there is a lot of electromagnetic interference, external electromagnetic waves affect the electronic devices inside the vehicle, and thus the electronic devices may not operate properly.

In order to solve this problem, electronic devices installed inside a vehicle have an electromagnetic wave blocking structure to protect electronic components or to prevent disturbance of command signals such as a control device.

In the motor assembly of the EPB actuator assembly, an EMC filter is installed on the brush card. In the conventional EMC filter, a choke coil and a capacitor are installed in a circuit board, and the circuit board is assembled on a brush card. However, such a circuit board type EMC filter has a problem of low price competitiveness due to a high unit cost.

In addition, the ground terminal connected from the circuit board is damaged during the stacking process for fixing the yoke to the brush card, causing a phenomenon to be lifted between the brush card and the yoke of the motor assembly, resulting in a high defect rate.

In addition, there is a problem in that the ground terminal connected and extended from the circuit board is damaged during the stacking process in which the yoke is fixed to the brush card, resulting in a defect of the ground terminal.

On the other hand, the EPB actuator assembly has a large number of built-in parts, which increases the number of processes required to assemble each part, resulting in an increase in manufacturing time and manufacturing cost.

Korean Patent Registration No. 10-0803816

The present invention is to solve the problems of the prior art as described above, and an object of the present invention is to provide an EMC filter of an electronic parking brake actuator assembly in which cost is reduced by different installation methods of the EMC filter.

Another object of the present invention is to provide an EMC filter for an electronic parking brake actuator assembly in which the quality of coupling between the yoke and the brush card is improved by preventing the ground wire from protruding to the outside of the brush card.

According to the features of the present invention for achieving the object as described above, the present invention provides an inner housing in which a motor terminal is inserted and a brush card part is integrally formed with a brush assembly installed so as to be electrically connected to the motor terminal, and the brush It includes a motor assembly coupled to the card portion and electrically connected, and a ground wire of an EMC filter provided in the brush assembly is seated in a ground groove formed on an outer surface of the brush card portion and pressed by the motor assembly.

The motor terminal has a bar-shaped terminal body extending to one side, and a first contact point in which one end of the terminal body is bent and extends in a direction perpendicular to the extension direction of the terminal body to contact an external terminal. , A second contact contacting the choke coil at the other end of the terminal body opposite the first contact point, and a branch portion extending in a direction perpendicular to the extension direction of the terminal body and the first contact point in the middle of the terminal body And, a third contact point that is bent at a tip end of the branch and extends in a direction parallel to the extension direction of the first contact point and away from each other.

The motor assembly includes an electric motor that rotates a shaft gear provided at a tip of a rotation shaft, a commutator installed on the rotation shaft and electrically connected to the electric motor, and the electric motor is accommodated therein and fixed to the brush card. It includes a yoke provided with a coupling end.

The brush assembly includes a brush in contact with the commutator, a brush holder slidably accommodated in the brush and fixed to the brush card, and an EMC that transmits only DC current among external currents to the brush and blocks electromagnetic interference. Includes a filter.

The EMC filter includes a pair of choke coils that are in contact with the second contact and are electrically connected, and a pair of capacitors that are in contact with the third contact and are electrically connected, and the pair of capacitors are formed by a ground line. Are connected to each other.

The inner housing has a side wall formed to have an inner space so that one side is open, a plurality of seating ends protruding outward along the edge of the side wall to which the front end of the yoke is in close contact, and the coupling between the plurality of seating ends. It includes a stacking part inclined to widen in the coupling direction of the motor assembly so that the end is in close contact and fixed, and the ground groove is formed between the plurality of seating ends so that the ground wire seated in the ground groove is in contact with the coupling end. .

The ground groove is formed by being grooved in a pair parallel to the direction of the motor assembly, and a return protrusion through which the ground wire is hooked is formed on opposite sides of the sidewall, so that the ground wire is seated in each of the pair of ground grooves.

A temporary assembly groove is formed at an edge of the ground groove to have a wider width than the ground groove.

Steps protrude inside the ground grooves so that a part of the ground line protrudes to the outer surface of the brush card part by the stepped steps.

The brush card part is integrally formed with the inner housing.

The EMC filter of the electronic parking brake actuator assembly according to the present invention as shown above has the following effects.

According to the present invention, since the choke coil and the capacitor constituting the EMC filter are installed in the brush card, the circuit board is not used, thereby reducing the cost. Therefore, there is an effect of lowering the unit price of the product.

According to the present invention, the ground groove is formed on the outer surface of the side wall of the brush card part so that the ground line does not protrude to the outer surface of the brush card part, so that lift does not occur when the yoke is combined with the brush card part. Therefore, there is an effect of reducing the ground failure rate and increasing the bonding stability. In addition, damage to the ground wire is prevented during the stacking process in which the yoke and the brush card are combined.

According to the present invention, since a pair of capacitors are connected by one ground line, even if a part of the ground line is disconnected, there is an effect that the performance of the EMC filter is maintained by the capacitor on the side that is not disconnected. Therefore, there is an effect of increasing the stability of the EMC filter.

1 is a perspective view showing an embodiment of an electronic runner brake actuator assembly according to the present invention.
Figure 2 is a perspective view showing the inside of the electronic runner brake actuator assembly constituting the embodiment of the present invention.
Figure 3 is an exploded perspective view showing the exploded embodiment of Figure 2;
4 is a perspective view showing the configuration of a motor terminal constituting an embodiment of the present invention.
Figure 5 is a perspective view showing the configuration of the brush card unit constituting the embodiment of the present invention.
6 is an enlarged perspective view showing a feature part of a brush card part constituting an embodiment of the present invention.
7 is an enlarged perspective view and an enlarged top view showing a state in which a yoke and a ground wire are coupled to a characteristic part of a brush card part constituting an embodiment of the present invention.
8 is a perspective view showing a motor assembly and a brush assembly combined in a brush card part constituting an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

The electronic runner brake actuator assembly (hereinafter referred to as “actuator”) according to the invention generates a large rotational force by decelerating the driving of the motor, and transmits it to the outside so that the electronic parking brake function is implemented. To this end, a gear assembly is installed together with the motor assembly 10 inside the actuator assembly of the present invention. The motor assembly 10 and the gear assembly are installed in the space between the outer housing 1 and the cover 2, as shown in FIG. 1, and the connector 1'formed on the outer housing 1 and the motor The assembly 10 is electrically connected.

2 and 3, in the motor assembly 10, the electric motor 11 generates a rotational force to rotate the rotation shaft 12, and the shaft gear 15 coupled to the front end of the rotation shaft 12 is It transmits power to other gears. The electric motor 11 is rotatably coupled to a rotor assembly provided with a plurality of magnets and a stator assembly on which coils are wound, and generates a rotational force when power is applied to the stator assembly.

A rotation shaft 12 is inserted in the center of the electric motor 11 to rotate together with the stator assembly, and transmits power to the outside through the shaft gear 15.

A commutator 13 may be further installed on the rotation shaft 12. The commutator 13 serves to change the direction of the current applied to the coil.

The electric motor 11 is surrounded by a yoke 14. 2, the yoke 14 and the electric motor 11 are shown as being formed separately, but in reality, the magnet of the rotor assembly is attached to the inner surface of the yoke 14, and the inside of the rotor assembly The stator assembly is rotatably assembled. The yoke 14 is made of metal. The yoke 14 serves as a passage for magnetic force lines generated in the rotor assembly, and blocks noise that may affect the stator assembly.

A coupling end (14a) is formed at the front end of the yoke (14). A plurality of the coupling ends 14a protrude along the leading edge of the yoke 14 at regular intervals. The coupling end (14a) protrudes in the longitudinal direction of the yoke (14). The coupling end (14a) is seated and fixed to the stacking portion (22f) of the brush card portion (22) to be described later.

On the other hand, since the present invention is not a major feature of the drive method and configuration of the gear assembly, a description will be omitted.

An inner housing 20 is provided between the outer housing 1 and the cover 2. Referring to FIG. 2, the inner housing 20 may include a brush card portion 22 to which the motor assembly 10 is coupled and a gear installation portion 21 to which the gear assembly is coupled.

The gear assembly is coupled to the gear installation part 21, and a plurality of gears mesh with each other to transmit the driving force generated by the motor assembly 10 to an external device. At this time, the number of rotations output may be changed according to the type and gear ratio of the gears constituting the gear assembly.

The brush card part 22 has a motor terminal 23 and a brush assembly 30 installed therein, and the motor assembly 10 is coupled to the inside of the brush card part 22. The motor terminal 23 is integrally formed by insert injection into the brush card part 22.

4 shows the shape of the motor terminal 23. Although only one motor terminal 23 is shown in FIG. 4, a pair of motor terminals 23 are provided in the inner housing 20 in a symmetrical shape. The motor terminal 23 has a bar-shaped terminal body 23a extending to one side. A first bent portion 23b is formed in the terminal body 23a, and the bent tip extends in a direction perpendicular to the terminal body 23a. A first contact point 23e is formed at the front end of the terminal body 23a bent by the first bent portion 23b. The first contact 23e contacts a connector terminal (not shown) installed in the connector 1 ′ to apply a current to the motor assembly 10.

A second contact 23f is formed at the end of the terminal body 23a opposite to the first contact 23e. The second contact 23f is grounded by contacting one side of the EMC filter 33 to be described later.

In the middle of the terminal body 23a, a branch portion 23c is formed in a direction perpendicular to the extension direction of the terminal body 23a and the first contact 23e. The branch portion 23c has a second bent portion 23d so that the tip of the branch portion 23c extends in a direction parallel to but opposite to the extending direction of the first contact point 23e. A third contact point 23g is formed at the tip of the branch portion 23c bent by the second bent portion 23d. The third contact 23g is in contact with the EMC filter 33. The EMC filter 33 will be described later.

Referring to FIG. 5, the brush card part 22 is surrounded by a side wall 22b and an inner space 22a is formed so that one side thereof is opened. A shaft hole 22c is formed in the center of the inner space 22a. A bearing (not shown) is seated inside the shaft hole 22c, and the rotation shaft 12 passes through the shaft hole 22c.

A commutator seating portion 22d may be formed at an edge of the shaft hole 22c. The commutator 13 is seated on the commutator seating part 22d. The commutator seating portion 22d is formed such that the bottom surface of the inner space 22a is partially concave and stepped.

A seating end 22e is formed on the outer surface of the side wall 22b. The seating end 22e is continuously formed along the outer circumferential surface of the side wall 22b. A plurality of seating ends 22e are formed at predetermined intervals. The seating end 22e is formed to protrude a predetermined distance from the outer surface of the side wall 22b, and the yoke 14 is in close contact with the outer surface of the seating end 22e and the side wall 22b. The seating end 22e is formed to have a width corresponding to the thickness of the yoke 14 so that the yoke 14 and the outer surface of the brush card part 22 may be smoothly connected.

A stacking portion 22f is formed at the seating end 22e. The stacking portion 22f is formed on the outer surface of the front end of the seating end 22e extending along the circumferential direction of the side wall 22b. That is, the stacking portion 22f is formed between the plurality of seating ends 22e. Since the coupling end 14a of the yoke 14 is fitted to the stacking part 22f, the stacking part 22f is formed at a position corresponding to the coupling end 14a of the yoke 14. Referring to FIG. 6, the stacking part 22f is formed to be inclined so that the width of the stacking part 22f is continuously widened toward the coupling direction of the motor assembly 10. When the pair of coupling ends 14a are deformed to be in close contact with the stacking part 22f, the brush card part 22 and the yoke 14 are fixed.

In the inner space 22a, a space surrounded by a partition wall 22g is formed at a position facing each other with respect to the shaft hole 22c, and a choke coil seating portion 22h is formed inside the partition wall 22g. The choke coil seating portion 22h is a space in which the choke coil 34 constituting the EMC filter 33 is accommodated. A wire groove 22i through which a wire extending from the choke coil 34 may pass may be formed in the partition wall 22g.

In the inner space 22a, a holder seating portion 22j is formed adjacent to the choke coil seating portion 22h. The brush holder 32 is fixed to the holder seating part 22j. The holder seating portion 22j is formed such that a pair of holder guides 22k extending toward the shaft hole 22c protrude parallel to each other. A pair of the holder seating portions 22j may be formed to be symmetrical to each other. However, the holder seating portion 22j may be point-symmetrical with respect to the shaft hole 22c, or may be line-symmetrical based on an imaginary straight line dividing the choke coil seating portion 22h to face each other.

A holder fixing hole 22l is formed in the holder seating part 22j. The holder fixing hole 22l fixes the brush holder 32. A bracket (not shown) formed in the brush holder 32 may be inserted into and fixed to the holder fixing hole 22l.

A capacitor seating portion 22m is formed in the inner space 22a adjacent to the holder seating portion 22j. A pair of the capacitor seating portions 22m may be formed adjacent to each other. Accordingly, the holder seating portion 22j may be formed between the capacitor seating portion 22m and the choke coil seating portion 22h. The capacitor 35 constituting the EMC filter 33 is seated in the capacitor seating portion 22m.

A pair of ground grooves 22n are formed on the outer surface of the sidewall 22b constituting a part of the capacitor seating portion 22m. The ground groove 22n has a groove formed in a direction in which the sidewall 22b protrudes. A ground line L4 connected to the capacitor 35 is seated in the ground groove 22n. When the ground line L4 is seated in the ground groove 22n, a part of the ground line L4 is recessed into the side wall 22b, so that the ground line L4 is protected from damage during the stacking operation. The stacking operation is a work of fixing the yoke 14 so as not to be separated from the brush card part 22 by intimate contact with the coupling end 14a of the yoke 14 to the stacking part 22f.

In addition, a pair of the ground grooves 22n is formed so that one ground line L4 is connected to a pair of capacitors 35 by turning with respect to the return protrusion 22r, which will be described later. With this structure, even if the ground line L4 seated in any one of the pair of ground grooves 22n is short-circuited, the motor terminal 23 to the yoke 14 are electrically connected, so that the grounding performance can be maintained.

A stepped step 22s may protrude inside the ground groove 22n. The stepped step 22s protrudes from the path of the ground groove 22n to further protrude a part of the ground line L4 to the outer surface of the sidewall 22b. The ground line L4 of the portion protruding further by the stepped portion 22s more reliably contacts the coupling end 14a, thereby forming a stable grounding structure. Accordingly, the stepped portion 22s is preferably formed at a position where the extension line of the inclined surface of the stacking portion 22f meets the ground groove 22n. This is because the contact stability can be maximized because the pair of coupling ends 14a are not opened even if they are in close contact with the stacking portion 22f during the stacking process.

Meanwhile, the stepped jaws 22s may be formed in various shapes as shown in FIGS. 9 and 10. There is a risk that the ground line (L4) protrudes to the outer surface of the sidewall (22b) by protruding while forming a gentle slope as shown in FIG. 9 or by forming the stepped (22s) small as shown in FIG. Can be reduced.

A temporary fixing groove 22n' is formed at the edge of the ground groove 22n. The temporary fixing groove 22n' has a relatively wider width than the ground groove 22n, but has a shallow depth. The coupling end (14a) is seated in the temporary fixing groove (22n') and is in close contact with the stacking portion (22f) to escape from the temporary fixing groove (22n').

The brush card part 22 has a first exposed part 22o formed on the outer surface of the seating end 22e. The first contact 23e of the motor terminal 23 is exposed through the first exposed portion 22o. When the first contact 23e is exposed through the first exposed part 22o, the first contact 23e and the connector terminal provided in the connector 1'of the external housing 1 are brought into contact with each other and are electrically Connected. On the other hand, since the motor terminal 23 is provided with a pair, it is preferable that the choke coil seating portion 22h and the capacitor seating portion 22m are also provided with a pair.

A second exposed portion 22p is formed in the inner space 22a to be adjacent to the choke coil seating portion 22h. The second contact 23f of the motor terminal 23 is exposed through the second exposure part 22p. The second contact 23f exposed through the second exposed portion 22p is electrically connected to the choke coil 34.

A third exposed portion 22q is formed in the inner space 22a adjacent to the capacitor seating portion 22m. The third contact 23g of the motor terminal 23 is exposed through the third exposed portion 22q. The third contact 23g exposed through the third exposed portion 22q is electrically connected to the capacitor 35.

Referring to FIG. 6, a return protrusion 22r protrudes on a surface opposite to the bottom surface of the inner space 22a so as to contact the inside of the side wall 22b on which the ground groove 22n is formed. The return protrusion 22r reverses the direction in which the ground line L4 extends so that the pair of capacitors 35 are connected to one ground line L4. In this structure, even if one ground line L4 is disconnected during the stacking process, the other capacitor 35 is still electrically connected, so that it can continue to function as the EMC filter 33.

A brush assembly 30 is installed in the inner space 22a of the brush card part 22. The brush assembly 30 receives power and a control signal from the connector 1'to control the rotational speed of the electric motor 11, or remove noise and detect only a direct current to the electric motor 11 ). The brush assembly 30 includes a brush 31 contacting the commutator 13, a brush holder 32 fixing the brush 31, and an EMC filter 33.

The brush 31 is accommodated in the brush holder 32 so as to reciprocate toward the shaft hole 22c, and the brush holder 32 has a bracket (not shown) inserted into the holder fixing hole 22l. It is installed in the holder seating portion 22j.

The EMC filter 33 is installed together with the brush 31 in the inner space 22a. The EMC filter 33 removes noise from a signal by blocking electromagnetic interference to the outside, and removes an AC component and a high frequency. The EMC filter 33 is composed of a choke coil 34 and a capacitor 35.

The first wire L1 extending from one end of the choke coil 34 is in contact with the second contact 23f, and the second wire L2 extending from the other end of the choke coil 34 is the brush ( 31). The choke coil 34 detects only direct current among the currents applied from the second contact 23f, and the direct current is applied to the brush 31 through the second wire L2.

The AC component filtered by the choke coil 34 moves to the third contact 23g through the branch 23c of the motor terminal 23. The third contact 23g is connected to one end of the capacitor 35 through a third wire L3, and a ground line L4 is connected to the other end of the capacitor 35 to contact the yoke 14. Grounded.

Meanwhile, the ground line L4 is all connected to the pair of capacitors 35. Specifically, referring to FIG. 7, the ground line L4 extending from the capacitor 35 on one side is seated in the ground groove 22n formed on the outer surface of the sidewall 22b, and rotates the return protrusion 22r. It is seated on the other side of the ground line (L4) and connected to the other side of the capacitor (35). In this structure, even if one ground line L4 is disconnected during the stacking process, the other capacitor 35 is still electrically connected, so that it can continue to function as the EMC filter 33.

Next, a process of assembling the motor assembly 10 of the brush 31 and the card-integrated electronic parking brake actuator assembly to the inner housing 20 according to the embodiment of the present invention will be described.

The inner housing 20 is formed by integrally insert-injecting the pair of motor terminals 23 into the brush card part 22. In the brush card part 22, the first contact 23e of the motor terminal 23 is exposed to the first exposed part 22o, and the second contact 23f is the second exposed part 22p. And the third contact 23g is exposed to the third exposed portion 22q.

Referring to FIG. 8, the brush assembly 30 is installed in the brush card part 22 provided with the motor terminal 23. The brush holder 32 is inserted into the brush 31 to enable reciprocating motion toward the shaft hole 22c, and is seated in the holder seating portion 22j. The choke coil 34 is seated on the choke coil seating portion 22h, and the capacitor 35 is seated on the capacitor seating portion 22m, and the EMC filter 33 is installed.

The first wire L1 and the second wire L2 extending from the choke coil 34 are connected to the second contact 23f and the brush 31, respectively. The current flowing through the second contact 23f is detected by the choke coil 34 and only a direct current component is detected and flows to the brush 31, and the AC component is a third wire connected to the third contact 23g. It flows to the capacitor 35 through L3). The pair of capacitors 35 are connected to each other by a ground line L4, and the ground line L4 is in contact with the yoke 14 to be grounded.

At this time, the ground line L4 is seated in the ground groove 22n formed on the outer surface of the side wall 22b. A part of the ground line L4 seated in the ground groove 22n is concavely seated and is protected by the ground groove 22n.

When the installation of the brush assembly 30 to the brush card portion 22 is completed, the motor assembly 10 is coupled to the brush card portion 22. The electric motor 11 enters the inner space 22a. The rotation shaft 12 passes through the shaft hole 22c and the shaft gear 15 is coupled to the opposite side, and the commutator 13 is in close contact with the commutator seating portion 22d. The front end of the yoke 14 is in contact with the seating end 22e, and the coupling portion enters the stacking portion 22f formed between the seating end 22e and is fitted into the temporary fixing groove 22n'. At this time, the coupling end 14a, which is a part of the yoke 14, is in contact with the ground line L4, thereby completing the grounding structure.

When the front end of the yoke 14 is in close contact with the seating end 22e, a stacking process in which the pair of coupling ends 14a are in close contact with the slope of the stacking portion 22f is performed. As the coupling portion is opened, the yoke 14 is fixed to the brush card portion 22, and the coupling end 14a is closely fixed to the stacking portion 22f in a'Y' shape.

In the above, even if all the constituent elements constituting the embodiment according to the present invention are described as being combined into one or operating in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the constituent elements may be selectively combined and operated in one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components. It should not be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art, unless otherwise defined. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

The brush card part 22 may be formed separately from the inner housing 20 to be assembled. The brush card part 22 need not be integrally formed with the inner housing 20, and may be appropriately changed according to a design environment. However, in this embodiment, the brush card part 22 is integrally formed with the inner housing 20.

1: external housing 1': connector
2: cover 10: motor assembly
11: electric motor 12: rotating shaft
13: commutator 14: yoke
14a: coupling end 15: shaft gear
20: inner housing 21: gear installation
22: brush card part 22a: internal space
22b: side wall 22c: shaft hole
22d: commutator seating portion 22e: seating end
22f: stacking part 22g: bulkhead
22h: choke coil seating part 22i: wire groove
22j: holder seat 22k: holder guide
22l: Holder fixing hole 22m: Capacitor seating part
22n: ground groove 22n': temporary fixing groove
22o: first exposed part 22p: second exposed part
22q: 3rd exposed part 22r: return protrusion
22s: step 23: motor terminal
23a: terminal body 23b: first bent part
23c: branching portion 23d: second bent portion
23e: first contact 23f: second contact
23g: third contact 30: brush assembly
31: brush 32: brush holder
33: EMC filter 34: choke coil
35: capacitor L1: first wire
L2: 2nd wire L3: 3rd wire
L4: ground wire

Claims (10)

An inner housing having a brush card portion in which a brush assembly is installed so that the motor terminal is insert-injected and electrically connected to the motor terminal;
Including a motor assembly coupled to the brush card portion and electrically connected,
The ground wire of the EMC filter provided in the brush assembly is seated in the ground groove formed on the outer surface of the brush card part and pressed by the motor assembly,
The EMC filter includes a pair of capacitors that are electrically connected to the motor terminal,
The pair of capacitors are connected to each other by a ground wire,
The ground groove is formed by being grooved in a pair parallel to the direction of the motor assembly,
An EMC filter of an electronic parking brake actuator assembly in which a return protrusion through which the ground line is hooked is formed opposite the sidewall of the inner housing, so that the ground line is seated in each of the pair of ground grooves.
The method of claim 1, wherein the motor terminal
A bar-shaped terminal body extending to one side,
A first contact point in which one end of the terminal body is bent to extend in a direction perpendicular to the extension direction of the terminal body to contact an external terminal,
At the other end of the terminal body opposite to the first contact point, a second contact point in contact with the choke coil,
A branch part extending in a direction perpendicular to the extension direction of the terminal body and the first contact point in the middle of the terminal body,
An EMC filter of an electronic parking brake actuator assembly comprising a third contact, which is bent at a tip end of the branch and extends in a direction parallel to and away from each other.
The method of claim 2, wherein the motor assembly
An electric motor that rotates the shaft gear provided at the tip of the rotating shaft,
A commutator installed on the rotating shaft and electrically connected to the electric motor,
An EMC filter of an electronic parking brake actuator assembly including a yoke having the electric motor received therein and having a coupling end fixed to the brush card.
The method of claim 3, wherein the brush assembly
A brush in contact with the commutator,
A brush holder in which the brush is slidably accommodated and fixed to the brush card part,
An EMC filter of an electronic parking brake actuator assembly comprising an EMC filter that transmits only DC current among external currents to the brush and blocks electromagnetic interference.
The method of claim 4, wherein the EMC filter
A pair of choke coils that are electrically connected by being in contact with the second contact point,
Including a pair of capacitors in contact with the third contact and electrically connected,
The EMC filter of the electronic parking brake actuator assembly wherein the pair of capacitors are connected to each other by a ground wire.
The method of claim 5, wherein the inner housing
A side wall that is formed to have an inner space so that one side is open,
A plurality of seating ends protruding outward along the edge of the side wall to which the front end of the yoke is in close contact;
A stacking portion inclined to widen in the coupling direction of the motor assembly so that the coupling end is in close contact and fixed between the plurality of seating ends,
The EMC filter of the electronic parking brake actuator assembly in which the ground groove is formed between the plurality of seating ends so that a ground wire seated in the ground groove is in contact with the coupling end.
delete The EMC filter of claim 1, wherein a temporary assembly groove is formed at an edge of the ground groove to have a width wider than that of the ground groove.
The EMC filter of claim 1, wherein a stepped protrudes inside the ground groove so that a part of the ground wire protrudes to an outer surface of the brush card part by the stepped step.
The EMC filter of claim 1, wherein the brush card part is integrally formed with the inner housing.

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