Motor

Abstract

The present invention may provide a motor including: a shaft; a rotor coupled to the shaft; a stator disposed to correspond to the rotor; a housing for receiving the stator and the rotor; a rotation part fixed to the shaft; an engagement part rotatably disposed in the housing and coming into contact with the rotation part to restrict rotation of the shaft; and a locking part disposed in the housing to control rotation of the engagement part.

Description

motor

[0001] The present invention relates to a motor.

[0002] A vehicle's electronic brake system, which uses a motor and a reducer to brake the vehicle, offers the advantages of being lighter, more responsive, and requiring less installation space than mechanical brakes. Furthermore, a vehicle's electric parking brake operates automatically using an actuator based on the vehicle's operating conditions, without the driver having to manually operate it.

[0003] These electric parking brakes can be implemented in a configuration that secures braking power by expanding the shoe inside the DIH (Drum In Hat) of the wheel with tension generated by pulling the parking cable through the rotation of the motor, or by pressing the pad against the disc by pushing the pad by advancing the piston of the spindle through the rotation of the motor.

[0004] In order to implement an electric parking brake function, an electric parking brake configuration must be added in addition to the electronic braking device, which requires a lot of installation space and complicates the configuration of related parts such as a reducer.

[0005] Accordingly, the present invention is intended to solve the above-mentioned problem, and its purpose is to provide a motor that can simplify the configuration of the entire braking device by adding a parking brake function to an electronic braking device.

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

[0007] An embodiment may provide a motor including a shaft, a rotor coupled to the shaft, a stator arranged correspondingly to the rotor, a housing accommodating the stator and the rotor, a rotating part fixed to the shaft, a catch part rotatably arranged in the housing and contacting the rotating part to restrict rotation of the shaft, and a locking part arranged in the housing to control rotation of the catch part.

[0008] The locking portion includes a first locking portion and a second locking portion that are positioned radially apart from the shaft and axially movable, and the first locking portion and the second locking portion can sequentially contact the engaging portion to control rotation of the engaging portion.

[0009] Optionally, a portion of the rotating portion and the engaging portion may overlap in the circumferential direction.

[0010] A portion of the first locking portion may be optionally arranged to overlap the catch portion in a circumferential direction, and a portion of the second locking portion may be arranged to overlap the catch portion in an axial direction.

[0011] The first locking portion may be arranged to overlap the catch portion in a circumferential direction to limit rotation of the catch portion.

[0012] The lower surface of the above-mentioned catch can be formed to be inclined.

[0013] The second locking part can rotate the locking part by pushing the lower surface of the locking part while the first locking part does not restrict the rotation of the locking part.

[0014] The housing may further include a first elastic member that is disposed in contact with the catch and provides elastic force to cause the catch to rotate toward the rotating member.

[0015] The above-mentioned hooking portion includes a first shaft portion arranged in the housing, a female portion rotatably coupled to the first shaft portion, and a tip portion protruding from the female portion and contacting the rotating portion, and the first elastic member can contact the tip portion.

[0016] The above first elastic member may be a torsion spring whose axis center is parallel to the axial direction of the shaft.

[0017] The axial direction of the above-mentioned catch and the axial direction of the above-mentioned shaft may be parallel.

[0018] The first locking part includes a first cylinder, a first plunger disposed inside the first cylinder, and a first coil disposed inside the first cylinder, and the second locking part includes a second cylinder, a second plunger disposed inside the second cylinder, and a second coil disposed inside the second cylinder, and when current is applied to the first coil and the second coil, the first plunger moves along the first cylinder, the second plunger moves along the second cylinder, the first plunger is selectively disposed to overlap the engaging part in a circumferential direction, and the second plunger can selectively contact a lower surface of the engaging part.

[0019] When current is applied to the first coil and the second coil, the movement direction of the first plunger and the movement direction of the second plunger may be opposite to each other.

[0020] The first locking member may include a second elastic member arranged between the first cylinder and the first plunger, the second locking member may include a third elastic member arranged between the second cylinder and the second plunger, the second elastic member may be a coil spring having a restoring force when stretched, and the third elastic member may be a coil spring having a restoring force when stretched.

[0021] The housing may include a body disposed on the outside of the stator and an extension extending radially from the body, and the extension may include a first receiving portion forming a receiving space in which the first locking portion is received, and a second receiving portion forming a receiving space in which the second locking portion is received.

[0022] The housing may include a body disposed on the outside of the stator and an extension extending radially from the body, and the extension may include a second shaft portion to which the first elastic member is rotatably coupled and a stopper in contact with the first elastic member.

[0023] According to one embodiment of the present invention, a parking brake function is added to an electronic braking device, which has the advantage of simplifying the configuration of the entire braking device.

[0024] According to one embodiment of the present invention, by directly restraining the shaft of the motor of the electronic braking device, there is no need for a separate parking brake configuration, thereby reducing the installation space and the number of parts.

[0025] According to one embodiment of the present invention, there is an advantage in that the parking brake function can be implemented more easily by restraining the shaft through a solenoid-type locking member.

[0026] Figure 1 is a drawing showing a motor according to an embodiment;

[0027] Fig. 2 is an exploded view of the motor shown in Fig. 1;

[0028] Fig. 3 is a side view of the motor illustrated in Fig. 1;

[0029] Figure 4 is a drawing showing a rotating part,

[0030] Figure 5 is a drawing showing a hanging part,

[0031] Fig. 6 is a cross-sectional view of the catch based on AA of Fig. 5.

[0032] Figure 7 is a drawing showing a catch, a first locking part, and a second locking part.

[0033] Figure 8 is an exploded view of the first locking part and the second locking part;

[0034] Figure 9 is a drawing showing the first plunger or the second plunger;

[0035] Fig. 10 is a side cross-sectional view of the first locking part;

[0036] Fig. 11 is a side cross-sectional view of the second locking part;

[0037] Figure 12 is a drawing showing the housing,

[0038] Figure 13 is a drawing showing a state in which the shaft is released without current being applied to the first locking part and the second locking part.

[0039] Fig. 14 is a drawing showing the positions of the first locking part and the second locking part corresponding to the catch in the state of Fig. 13.

[0040] Figure 15 is a drawing showing a state in which power is applied to the first locking part and the second locking part, and the shaft is restrained by the engaging part.

[0041] Fig. 16 is a drawing showing the positions of the first locking part and the second locking part corresponding to the catch in the state of Fig. 15.

[0042] Figure 17 is a drawing showing the positions of the first locking part and the second locking part when the power is turned off, while the locking part is restraining the rotating part.

[0043] Fig. 18 is a drawing showing a state in which the shaft is restrained by a catch, power is applied to the first locking part and the second stop part, and the catch is separated from the rotating part, thereby releasing the restraint of the shaft.

[0044] Fig. 19 is a drawing showing the positions of the first locking part and the second locking part corresponding to the catch in the state of Fig. 18.

[0045] Figure 20 is a drawing showing a state in which the first plunger of the first locking part moves the engaging part.

[0046] Figure 21 is a drawing showing the positions of the first locking part and the second locking part when the power is turned off, with the engaging part detached from the rotating part.

[0047] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0048] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0049] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0050] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0051] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0052] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0053] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0054] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0055] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," it can include the meaning of a downward direction as well as an upward direction based on one component.

[0056] FIG. 1 is a drawing showing a motor according to an embodiment, FIG. 2 is an exploded view of the motor shown in FIG. 1, and FIG. 3 is a side view of the motor shown in FIG. 1.

[0057] Referring to FIGS. 1 to 3, a motor according to an embodiment may include a shaft (100), a rotor (200), a stator (300), a rotating part (400), a catch (500), a first locking part (600), a second locking part (700), and a housing (800).

[0058] Hereinafter, the circumferential and radial directions are based on the motor's axis center. The axis center of the rotating part (400) may be the same as the motor's axis center. The axis center of the first locking part (600) may be parallel to the motor's axis center.

[0059] Below, the motor has the characteristic of having a parking brake function in addition to the vehicle's braking function.

[0060] The shaft (100) can be coupled to the rotor (200).

[0061] The rotor (200) can rotate through electromagnetic interaction with the stator (300). The rotor (200) can be arranged to correspond to the stator (300). The rotor (200) can be arranged radially inside the stator (300). The rotor (200) can include a magnet.

[0062] The stator (300) may be arranged on the outside of the rotor (200). The stator (300) may include a stator core (310), an insulator (320), and a coil (330). The insulator (320) is mounted on the stator core (310). The coil (330) may be wound around the insulator (320). The insulator (320) may be arranged between the coil (330) and the stator core (310), thereby electrically insulating the stator core (310) and the coil (330) from each other.

[0063] The rotating part (400) can be coupled to the shaft (100). The rotating part (400) can be arranged on the outside of the housing (800). The rotating part (400) can rotate integrally with the shaft (100) as the shaft (100) rotates. The rotating part (400) is coupled with the first locking part (600) to selectively restrain the shaft (100). The rotating part (400) can be arranged to overlap the rotor (200) in the axial direction.

[0064] The engaging portion (500) can be rotatably coupled to the housing (800). The axial direction of the engaging portion (500) can be parallel to the axial direction of the shaft (100). The engaging portion (500) engages with the rotating portion (400) to restrain the shaft (100).

[0065] The locking part may include a first locking part (600) and a second locking part (700).

[0066] The first locking portion (600) can be coupled to the housing (800). The first locking portion (600) is a device that implements a parking brake function by controlling the rotation of the engaging portion (500) when a signal is applied when the vehicle is stopped, thereby restraining the shaft (100) from rotating. Specifically, the first locking portion (600) is selectively arranged to overlap the engaging portion (500) in the circumferential direction, thereby limiting the rotation of the engaging portion (500).

[0067] The first locking portion (600) can be connected to the connector (10). The first locking portion (600) can be positioned on the outside of the housing (800). The first locking portion (600) can be positioned so as not to overlap the rotor (200) or the stator (300) in the axial direction. In addition, the first locking portion (600) can be positioned so as not to overlap the rotor (200) or the stator (300) in the radial direction.

[0068] A second locking member (700) may also be coupled to the housing (800). The second locking member (700) is another device that implements a parking brake function by controlling the rotation of the engaging member (500) when a signal is applied when the vehicle is stopped together with the first locking member (600) to prevent the shaft (100) from rotating. Specifically, the second locking member (700) is selectively arranged to overlap the engaging member (500) in the axial direction and serves to push the lower surface of the engaging member (500) to rotate the engaging member.

[0069] The second locking portion (700) may also be connected to the connector (10). The second locking portion (700) may be positioned so as not to overlap the rotor (200) or the stator (300) in the axial direction. In addition, the second locking portion (700) may also be positioned so as not to overlap the rotor (200) or the stator (300) in the radial direction.

[0070] Both the first locking portion (600) and the second locking portion (700) can be positioned within the rotation radius of the engaging portion (500). In addition, the first locking portion (600) can be positioned further away from the axis center of the engaging portion (500) than the second locking portion (700).

[0071] The housing (800) is placed on the outside of the stator (300).

[0072] The engaging member (500) is moved by a first elastic member (S1, see FIG. 7). The first elastic member (S1) is arranged in the housing (800) and provides elastic force so that the engaging member (500) rotates toward the rotating member (400). The first elastic member (S1) may be a torsion spring that comes into contact with the engaging member (500).

[0073] Figure 4 is a drawing illustrating a rotating part (400).

[0074] Referring to FIG. 4, the rotating member (400) may be a disc-shaped member. The rotating member (400) may include a hole (H) through which the shaft (100) passes. The hole (H) may be arranged at the center of the rotating member (400). In addition, the rotating member (400) may include a plurality of grooves (G). The grooves (G) may be formed to be concave inward at an edge of the rotating member (400). The plurality of grooves (G) may be arranged at regular intervals along the edge of the rotating member (400).

[0075] Fig. 5 is a drawing showing a catch (500), and Fig. 6 is a cross-sectional view of the catch (500) based on AA of Fig. 5.

[0076] Referring to FIGS. 4 to 6, the engaging portion (500) may include a first shaft portion (C1), an arm portion (520), and a tip portion (530). The first shaft portion (C1) may be coupled to the housing (800). The axial direction of the first shaft portion (C1) may be parallel to the axial direction of the shaft (100). The arm portion (520) may have one end rotatably coupled to the first shaft portion (C1). The arm portion (520) may rotate around the first shaft portion (C1). The arm portion (520) may have a shape in which the cross-sectional size decreases toward the other end. The tip portion (530) may extend from the other end of the arm portion (520). The tip portion (530) can extend from the other end of the female portion (520) to be perpendicular to the female portion (520). The tip portion (530) is inserted into the groove portion (G) of the rotating portion (400). The end of the tip portion (530) can be formed to be pointed so as to be easily inserted into the groove portion (G) of the rotating portion (400).

[0077] The lower surface (501) of the engaging portion (500) may be a convex curved surface. This is a configuration for inducing rotation of the engaging portion (500) when the second locking portion (700) pushes the convex lower surface (501) of the engaging portion (500).

[0078] Fig. 7 is a drawing showing a catch (500), a first locking part (600), and a second locking part (700), and Fig. 8 is an exploded view of the first locking part (600) and the second locking part (700).

[0079] The locking part (600, 700) can control the rotation of the engaging part (500). The rotation of the engaging part (500) can be restricted or the engaging part (500) can be rotated according to the sequential operation of the locking parts (600, 700).

[0080] Referring to FIGS. 7 and 8, the first locking portion (600) and the second locking portion (700) may be positioned axially below the engaging portion (500), respectively. In addition, the second locking portion (700) may be positioned closer to the first axial portion (C1) of the engaging portion (500) than the first locking portion (600). The first elastic member (S1) contacts the side surface of the engaging portion (500) and constantly provides elastic force so that the engaging portion (500) approaches the rotating portion (400).

[0081] The first locking member (600) may include a first cylinder (610), a first coil (620), and a first plunger (630).

[0082] The first cylinder (610) may be a cylindrical member forming a hollow space therein. The first plunger (630) may be arranged inside the first cylinder (610). The first coil (620) may be arranged inside the first cylinder (610). The first plunger (630) is arranged in the hollow space of the first cylinder (610) and performs a linear reciprocating motion. The first cylinder (610) may move in the axial direction to form a contact area with the engaging portion (500) so as to prevent the engaging portion (500) from rotating.

[0083] The second locking member (700) may include a second cylinder (710), a second coil (720), and a second plunger (730).

[0084] The second cylinder (710) may be a cylindrical member forming a hollow space therein. The second plunger (730) may be arranged inside the second cylinder (710). The second coil (720) may be arranged inside the second cylinder (710). The second plunger (730) is arranged in the hollow space of the second cylinder (710) and performs a linear reciprocating motion. The second cylinder (710) moves in the axial direction to form a contact area with the lower surface (501) of the engaging portion (500) so that the engaging portion (500) rotates.

[0085] Figure 9 is a drawing illustrating a first plunger (630) or a second plunger (730).

[0086] Referring to FIG. 9, the first plunger (630) and the second plunger (730) may have the same shape and size.

[0087] The first plunger (630) and the second plunger (730) may each include a protrusion (P) at the tip. In particular, the protrusion (P) of the second plunger (730) contacts the convex lower surface (501) of the engaging portion (500) to induce rotation of the engaging portion (500).

[0088] The first plunger (630) may include a first flange (631). The first flange (631) may protrude from the outer surface of the first plunger (630) and be arranged along the periphery of the first plunger (630). The first flange (631) serves to support the second elastic member (S2, see FIG. 10).

[0089] The second plunger (730) may include a second flange (731). The second flange (731) may protrude from the outer surface of the second plunger (730) and be arranged along the periphery of the second plunger (730). The second flange (731) serves to support the third elastic member (S3, see FIG. 11).

[0090] The first plunger (630) and the second plunger (730) may each be made of a metal material.

[0091] Figure 10 is a side cross-sectional view of the first locking part (600).

[0092] Referring to Fig. 10, the first locking member (600) may include a second elastic member (S2). The second elastic member (S2) may be positioned between the first flange (631) and the first cylinder (610) with respect to the direction of movement of the first plunger (630). The second elastic member (S2) may be a coil spring having a restoring force when contracted. When no current is applied to the first coil (620), the first plunger (630) may be maintained in a state of protruding out of the first cylinder (610) by the second elastic member (S2).

[0093] Figure 11 is a side cross-sectional view of the second locking part (700).

[0094] Referring to Fig. 11, the second locking member (700) may include a third elastic member (S3). The third elastic member (S3) may be positioned between the second flange (731) and the second cylinder (710) with respect to the movement direction of the second plunger (730). The third elastic member (S3) may be a coil spring having a restoring force when stretched. When no current is applied to the second coil (720), the second plunger (730) may be maintained to be positioned inside the second cylinder (710) by the third elastic member (S3).

[0095] Fig. 12 is a drawing illustrating a housing (800).

[0096] Referring to FIG. 12, the housing (800) may include a body (810) and an extension (820). The body (810) is a cylindrical member that forms a space on the inside to accommodate a rotor (200) and a stator (300). The extension (820) may be formed to extend radially from the upper end of the body (810).

[0097] The extension (820) may include a first receiving portion (821) and a second receiving portion (822). The first receiving portion (821) may form a space for receiving the first locking portion (600). And the second receiving portion (822) may form a space for receiving the second locking portion (700). Since the first receiving portion (821) and the second receiving portion (822) are arranged in the extension (820) in this way, there is no need to provide a separate housing for receiving the first locking portion (600) and the second locking portion (700).

[0098] And the extension part (820) may include a second shaft part (C2). The second shaft part (C2) protrudes from one surface of the extension part (820). This second shaft part (C2) is where the first elastic member (S1) is mounted. The first elastic member (S1) is arranged in the housing (800) and can provide elastic force so that the engaging part (500) rotates toward the rotating part (400). This first elastic member (S1) can rotate around the second shaft part (C2).

[0099] The extension portion (820) may include a stopper (823). The stopper (823) may be in contact with one side of the first elastic member (S1) to support the first elastic member (S1). The stopper (823) may protrude from one surface of the extension portion (820). The stopper (823) may be arranged adjacent to the second shaft portion (C2). One end of the first elastic member (S1) may be in contact with the stopper (823), and the other end of the first elastic member (S1) may be in contact with the engaging portion (500).

[0100] FIG. 13 is a drawing showing a state in which the shaft (100) is released without current being applied to the first locking portion (600) and the second locking portion (700), and FIG. 14 is a drawing showing the positions of the first locking portion (600) and the second locking portion (700) corresponding to the engaging portion (500) in the state of FIG. 13.

[0101] When the vehicle is running or stopped, and there is no separate signal, power is not applied to the first coil (620) and the second coil (720). As illustrated in FIGS. 13 and 14, in this constant state, the first plunger (630) of the first locking portion (600) is protruded by the second elastic member (S2) so that the first plunger (630) is positioned to be caught on one side of the engaging portion (500). The first elastic member (S1) is positioned on the other side of the engaging portion (500), and the engaging portion (500) is receiving a force to rotate, but the first plunger (630) is in contact with one side of the engaging portion (500), so that the first plunger (630) prevents the engaging portion (500) from rotating.

[0102] At this time, the second plunger (730) does not come into contact with the engaging portion (500) because it is positioned inside the second cylinder (710) by the third elastic member (S3).

[0103] FIG. 15 is a drawing showing a state in which power is applied to the first locking part (600) and the second locking part (700) and the shaft (100) is restrained by the engaging part (500), and FIG. 16 is a drawing showing the positions of the first locking part (600) and the second locking part (700) corresponding to the engaging part (500) in the state of FIG. 15.

[0104] When the vehicle is parked and a signal related to the parking brake is input, power is applied to the first coil (620) and the second coil (720). The first plunger (630) moves in a straight line along the first cylinder (610) due to the electromagnetic interaction between the first coil (620) and the first plunger (630). As the first plunger (630) overcomes the restoring force of the second elastic member (S2), the first plunger (630) enters the first cylinder (610). As the first plunger (630) enters the first cylinder (610), the contact between the first plunger (630) and the engaging portion (500) is released, and thus the engaging portion (500) rotates toward the rotating portion (400) due to the first elastic member (S1).

[0105] Meanwhile, the second plunger (730) moves linearly along the second cylinder (710) with a time difference from the first plunger (630) due to the electromagnetic interaction between the second coil (720) and the second plunger (730). The time difference in the movements of the first plunger (630) and the second plunger (730) can be determined by the control of the current, the difference in the diameter, length, and elastic modulus of the first coil (620) and the second coil (720), and the difference in the size, weight, etc. of the first plunger (630) and the second plunger (730). The second plunger (730) can move until the second plunger (730) contacts the lower surface (501) of the engaging portion (500) while overcoming the restoring force of the third elastic member (S3).

[0106] Fig. 17 is a drawing showing the positions of the first locking part (600) and the second locking part (700) with the power turned off while the locking part (500) restrains the rotating part (400).

[0107] Referring to Fig. 17, when the engaging portion (500) is engaged with the groove (G) of the rotating portion (400) by the first elastic member (S1), and the power of the first locking portion (600) and the second locking portion (700) is turned off due to a condition such as the vehicle engine being turned off, the first plunger (630) is positioned to protrude out of the first cylinder (610) due to the restoring force of the second elastic member (S2) and engage with the other side of the engaging portion (500). In addition, the second plunger (730) enters the interior of the second cylinder (710) due to the restoring force of the third elastic member (S3) and is separated from the engaging portion (500).

[0108] In addition to the restoring force of the first elastic member (S1), since the first plunger (630) supports the other side of the engaging portion (500), the engaging portion (500) does not rotate and remains engaged with the rotating portion (400), thereby restraining the shaft (100) from rotating. That is, the shaft (100) is restrained from rotating when the power of the first locking portion (600) and the second locking portion (700) is turned off, thereby implementing a parking brake function.

[0109] FIG. 18 is a drawing showing a state in which the shaft (100) is restrained by the engaging portion (500), power is applied to the first locking portion (600) and the second locking portion (700), and the engaging portion (500) is detached from the rotating portion (400), thereby releasing the restraint of the shaft (100). FIG. 19 is a drawing showing the positions of the first locking portion (600) and the second locking portion (700) corresponding to the engaging portion (500) in the state of FIG. 18.

[0110] When a signal such as the vehicle engine turning on is generated, current is applied to the first locking portion (600) and the second locking portion (700) while the engaging portion (500) is engaged with the rotating portion (400). When current is applied to the first locking portion (600) and the second locking portion (700), the first plunger (630) overcomes the restoring force of the second elastic member (S2) and enters the first cylinder (610). As the first plunger (630) enters the first cylinder (610), the contact between the first plunger (630) and the engaging portion (500) is released, so the engaging portion (500) can rotate when it overcomes the restoring force of the first elastic member (S1).

[0111] Figure 20 is a drawing showing a state in which the first plunger (630) of the first locking part (600) moves the engaging part (500).

[0112] As illustrated in Fig. 20, the second plunger (730) moves while pushing the lower surface (501) of the engaging portion (500) while overcoming the restoring force of the third elastic member (S3). In a state where the engaging portion (500) is engaged with the rotating portion (400), the protrusion (P) of the second plunger (730) is positioned away from the width center of the engaging portion (500) and closer to the rotating portion (400) than the width center (CL) of the engaging portion (500). Therefore, when the protrusion (P) of the second plunger (730) pushes up the lower surface (501) of the engaging portion (500), the engaging portion (500) rotates away from the rotating portion (400).

[0113] In this way, the second plunger (730) moves the engaging portion (500) until it reaches the position of the engaging portion (500) in the normal state.

[0114] Fig. 21 is a drawing showing the positions of the first locking part (600) and the second locking part (700) with the power turned off, in a state where the engaging part (500) is detached from the rotating part (400).

[0115] Referring to Fig. 21, when the vehicle is running or stopped, and in a constant state without a separate signal, when the power of the first locking unit (600) and the second locking unit (700) are turned off, the first plunger (630) of the first locking unit (600) is protruded by the second elastic member (S2) so that the first plunger (630) is positioned to be caught on one side of the engaging unit (500). The first elastic member (S1) is positioned on the other side of the engaging unit (500), and the engaging unit (500) is receiving a force to rotate, but the first plunger (630) on one side of the engaging unit (500) is blocking the rotation of the engaging unit (500). At this time, the second plunger (730) is not in contact with the engaging portion (500) because it is positioned inside the second cylinder (710) by the third elastic member (S3).

[0116] By restraining the rotating part (400) connected to the shaft (100) of the motor of the electronic brake device in this way, there is no need for a separate parking brake configuration, thereby reducing installation space and the number of parts. In addition, by restraining the shaft (100) through a solenoid-type locking part, the parking brake function can be implemented more easily. In particular, the parking brake function can be performed with the two locking parts while power to the locking parts is cut off.

[0117] Above, a motor according to a preferred embodiment of the present invention has been specifically examined with reference to the attached drawings.

[0118] It should be understood that the above-described embodiments of the present invention are illustrative in all respects and not restrictive. The scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of these claims, as well as all possible modifications or variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

Claims

1. Shaft; A rotor coupled with the above shaft; A stator arranged corresponding to the rotor; A housing accommodating the stator and rotor; A rotating part fixed to the above shaft; A catch that is rotatably arranged in the housing and contacts the rotating part to restrict rotation of the shaft; and placed in the above housing A motor including a locking part that controls the rotation of the above-mentioned catch.

2. In paragraph 1, The locking portion includes a first locking portion and a second locking portion that are positioned radially apart from the shaft and are axially movable, A motor that sequentially contacts the first locking portion and the second locking portion with the engaging portion to control the rotation of the engaging portion.

3. In paragraph 2, A motor in which a portion of the rotating portion and the engaging portion optionally overlap in the circumferential direction.

4. In paragraph 3, A motor in which a portion of the first locking portion is selectively arranged to overlap the catch portion in a circumferential direction, and a portion of the second locking portion is selectively arranged to overlap the catch portion in an axial direction.

5. In paragraph 2, A motor in which the first locking portion is arranged to overlap the engaging portion in a circumferential direction and restrict rotation of the engaging portion.

6. In paragraph 2, A motor in which the lower surface of the above-mentioned catch is formed to be inclined.

7. In paragraph 6, The second locking part is a motor that rotates the locking part by pushing the lower surface of the locking part while the first locking part does not restrict the rotation of the locking part.

8. In paragraph 2, A motor further comprising a first elastic member disposed in the housing and in contact with the catch portion to provide elastic force so that the catch portion rotates toward the rotating portion.

9. In paragraph 8, The above-mentioned hooking portion includes a first shaft portion arranged in the housing, a female portion rotatably coupled to the first shaft portion, and a tip portion protruding from the female portion and contacting the rotating portion. The above first elastic member is a motor in contact with the tip portion.

10. In paragraph 8, A motor in which the above first elastic member is a torsion spring whose axis center is parallel to the axial direction of the shaft.

11. In paragraph 1, A motor in which the axial direction of the above-mentioned catch and the axial direction of the above-mentioned shaft are parallel.

12. In paragraph 2, The first locking member includes a first cylinder, a first plunger disposed inside the first cylinder, and a first coil disposed inside the first cylinder. The second locking member includes a second cylinder, a second plunger disposed inside the second cylinder, and a second coil disposed inside the second cylinder. When current is applied to the first coil and the second coil, the first plunger moves along the first cylinder, and the second plunger moves along the second cylinder. The above first plunger is optionally arranged to overlap the engaging portion in the circumferential direction, The above second plunger is a motor that optionally contacts the lower surface of the engaging portion.

13. In paragraph 12, A motor in which, when current is applied to the first coil and the second coil, the movement direction of the first plunger and the movement direction of the second plunger are opposite to each other.

14. In paragraph 12, The first locking member includes a second elastic member disposed between the first cylinder and the first plunger, The second locking member includes a third elastic member disposed between the second cylinder and the second plunger, The above second elastic member is a coil spring having a restoring force when stretched, The above third elastic member is a motor that is a coil spring having restoring force when stretched.

15. In paragraph 2, The housing includes a body disposed on the outside of the stator and an extension extending radially from the body, A motor in which the extension part includes a first receiving part forming a receiving space in which the first locking part is received, and a second receiving part forming a receiving space in which the second locking part is received.

16. In paragraph 8, The housing includes a body disposed on the outside of the stator and an extension extending radially from the body, A motor including a second shaft portion to which the first elastic member is rotatably coupled, and a stopper in contact with the first elastic member.

Images