Motor

Abstract

The present invention can provide a motor comprising: a shaft; a rotor coupled to the shaft; a stator positioned corresponding to the rotor; a locking part that is disposed on one side of the shaft and constrains the rotation of the shaft when necessary; a housing for accommodating the stator; and a terminal part disposed above the stator. The motor further includes a wire for connecting the locking part to the terminal part. The wire is disposed along a space between the locking part and the housing and along a space between the stator and the housing and is connected to the terminal 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] The embodiment may provide a motor including a shaft, a rotor coupled to the shaft, a stator arranged to correspond to the rotor, a locking portion arranged on one side of the shaft to restrict rotation of the shaft when necessary, a housing that accommodates the stator, and a terminal portion arranged on the stator, and including a wire connecting the locking portion and the terminal portion, the wire being arranged along a space between the locking portion and the housing and a space between the stator and the housing and connected to the terminal portion.

[0008] A plate is included that is arranged inside the housing, and the plate is arranged to be in contact with the locking part so that a space is formed between the housing and the locking part in the axial direction of the shaft, and the wire can be arranged in the space.

[0009] A portion of the above shaft and a portion of the above locking member may overlap axially and radially.

[0010] The locking member may include a stopper that moves axially and contacts the shaft to prevent the shaft from rotating.

[0011] The plate includes a plate body that contacts the locking portion, and a leg portion that extends from the plate body and contacts the housing, and the body can be arranged to be spaced apart from the housing.

[0012] The housing includes a groove disposed on the inner surface, and a portion of the wire can be disposed in the groove.

[0013] The housing includes a housing body and a first cover coupled to the housing body, and the groove portion includes a first groove and a second groove that are connected to each other, the first groove being arranged in the first cover, and the second groove being arranged in the housing body.

[0014] It further includes a wire holder, wherein the wire holder is disposed in the second groove, and the wire can be disposed inside the wire holder.

[0015] The device further includes a mold portion disposed on the stator, and the terminal portion includes a first terminal and a second terminal that are connected to each other, the first terminal being disposed on the mold portion, and the second terminal being disposed on the wire holder and being able to be connected to the wire positioned on the wire holder.

[0016] A portion of the mold portion and the wire holder may be arranged to overlap radially.

[0017] 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.

[0018] 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.

[0019] According to one embodiment of the present invention, there is an advantage in that the size of a configuration for implementing a parking brake function is minimized by arranging the stopper to overlap the shaft in the axial direction.

[0020] According to one embodiment of the present invention, there is an advantage in that a leakage problem caused by the wire being exposed to the outside is fundamentally prevented by placing the wire connected to the locking part inside the housing instead of taking it out of the housing.

[0021] Figure 1 is a drawing showing a motor according to an embodiment;

[0022] Fig. 2 is a side view of the motor illustrated in Fig. 1;

[0023] Figure 3 is an exploded view of the locking part;

[0024] Figure 4 is a side cross-sectional view of the locking part;

[0025] Figure 5 is a drawing showing a shaft and a locking part;

[0026] Figure 6 is a drawing showing the first part of the stopper and the second cylinder;

[0027] Figure 7 is a drawing showing a state in which a current is applied to the locking part and the stopper moves.

[0028] Figure 8 is a drawing showing a state in which the shaft is restrained by a locking member.

[0029] Figure 9 is a drawing showing a locking part, a terminal part, a wire, and a plate.

[0030] Fig. 10 is a drawing showing the housing body of the housing;

[0031] Fig. 11 is a drawing showing the first cover of the housing;

[0032] Figure 12 is a drawing showing the assembly process of the locking part.

[0033] Fig. 13 is a perspective view showing a plate;

[0034] Figure 14 is a drawing showing a state in which a lock is arranged in the housing.

[0035] Figure 15 is a side view showing the arrangement of wires.

[0036] Figure 16 is a drawing showing a mold part.

[0037] Figure 17 is an enlarged view showing the connection between the wire and the terminal part.

[0038] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] FIG. 1 is a drawing showing a motor according to an embodiment, and FIG. 2 is a side view of the motor shown in FIG. 1.

[0048] Referring to FIGS. 1 and 2, a motor according to an embodiment may include a shaft (100), a rotor (200), a stator (300), a locking portion (400), a housing (500), a terminal portion (600), a wire (700), a plate (800), a wire holder (900), and a mold portion (1000).

[0049] Hereinafter, the inner side means the direction arranged toward the shaft (100) based on the radial direction of the motor, and the outer side means the direction opposite to the inner side. And hereafter, the circumferential direction and the radial direction are based on the axis center of the motor.

[0050] Below, the motor has the characteristic of having a parking brake function in addition to the vehicle's braking function.

[0051] The shaft (100) can be rotatably supported in the axial direction by a bearing. The shaft (100) can be arranged such that parts having different outer diameters are separated along the axial direction.

[0052] The rotor (200) rotates through electromagnetic interaction with the stator (300). The rotor (200) may include a magnet arranged on the outer surface of the shaft (100).

[0053] The stator (300) is disposed 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) is disposed between the coil (330) and the stator core (310), thereby electrically insulating the stator core (310) and the coil (330) from each other. The coil (330) induces an electromagnetic interaction with the magnet (220) of the rotor (200).

[0054] The locking unit (400) is positioned inside the shaft (100). The locking unit (400) is a device that implements a parking brake function by restraining the shaft (100) from rotating when a signal is applied when the vehicle is stopped. The locking unit (400) is connected to the terminal unit (600).

[0055] The housing (500) is placed on the outside of the stator (300).

[0056] The terminal section (600) transmits power or control signals to the lock section (400). The terminal section (600) includes a first terminal (610) and a second terminal (620). The first terminal (610) is connected to a wire (700), and the second terminal (620) is connected to the first terminal (610). In addition, the second terminal (620) is connected to an external power source.

[0057] The wire (700) is connected to the locking member (400). And the wire (700 in FIG. 14) is connected to the first terminal (610). The wire (700 in FIG. 14) can be placed inside the housing (500).

[0058] The plate (800) is placed below the locking member (400). The plate (800) is fixed to the housing (500). The locking member (400) can be fixed to the plate (800).

[0059] The wire holder (900) accommodates the wire (700). The wire holder (900) can be fixed to the housing (500).

[0060] The mold part (1000) can be placed on top of the stator (200). And the mold part (1000) can be placed on the outside of the bus bar (B).

[0061] Fig. 3 is an exploded view of the locking part (400). Fig. 4 is a side cross-sectional view of the locking part (400).

[0062] Referring to FIGS. 3 and 4, the locking member (400) may include a stopper (410), a case (420), a second cylinder (450), a second coil (470), and a second elastic member (490).

[0063] The stopper (410) may include a first part (411) and a second part (412). The first part (411) is axially laminated to the second part (412). When the second part (412) moves, the first part (411) is configured to move in conjunction therewith. The first part (411) includes a protrusion (P). The second part (412) electromagnetically interacts with the second coil (470) to move linearly along the inside of the second cylinder (450).

[0064] The case (420) may be a cylindrical member forming an accommodation space therein. The case (420) may include a cover (451) covering the open upper portion.

[0065] The second cylinder (450) is placed inside the case (420).

[0066] The second coil (470) is disposed inside the case (420) and may be disposed on one side of the second cylinder (450). The second coil (470) may be coupled to a bobbin (470). The bobbin (470) is disposed on one side of the second cylinder (450). The second coil (470) is connected to an external connector.

[0067] The second elastic member (490) is axially arranged between the inner wall of the case (420) and the first part (411). The second elastic member (490) may be a coil spring having a restoring force when stretched. Due to the restoring force of the second elastic member (490), the first part (411) is separated from the shaft (100).

[0068] Figure 5 is a drawing showing a shaft (100) and a locking part (400).

[0069] Referring to FIGS. 4 and 5, the first part (411) may include a protrusion (P).

[0070] The stopper (410) of the locking part (400) moves along the axial direction so that the protrusion (P) is inserted into the groove (G3) of the shaft (100), thereby preventing the shaft (100) from rotating by being restrained by the stopper (410).

[0071] Figure 6 is a drawing showing the first part (411) and the second cylinder (450) of the stopper (410).

[0072] Referring to FIGS. 5 and 6, the first part (411) may include a cylindrical body (411a) and a plurality of wing portions (411b) protruding from the outer surface of the body (411a). The second elastic member (490) is mounted on one side of the wing portion (411b). The wing portion (411b) may include a first surface (411c) disposed on the other side. The first surface (411c) is a surface that contacts the second surface (451) disposed on one end of the second cylinder (450) or one side of the second part (412). The first surface (411c) may be formed to be inclined.

[0073] The second cylinder (450) may include a cylinder body (450a) and a plurality of columns (450b) protruding from the cylinder body (450a). The plurality of columns (450b) form a gap (X) at a constant interval. The column (450b) includes a second surface (451) formed on one end. It may be arranged to be inclined to correspond to the first surface (411c), but may be implemented to form a step (ST).

[0074] Figure 7 is a drawing showing a state in which a current is applied to the locking part (400) and the stopper (410) moves.

[0075] As illustrated in (a) of Fig. 7, when the vehicle is running or stopped and there is no separate signal, power is not applied to the second coil (470), and the protrusion (P) is positioned apart from the groove (G3) by the restoring force of the second elastic member (490). The shaft (100) is not restrained by the stopper (410) and rotates due to the electromagnetic interaction between the rotor (200) and the stator (300).

[0076] As illustrated in (b) of FIG. 7, when the vehicle is in a parked state and a signal related to the parking brake is input and power is applied to the second coil (470), the second part (412) of the stopper (410) moves linearly along the second cylinder (450) due to the electromagnetic interaction between the second coil (470) and the stopper (410). The second part (412) of the stopper (410) moves linearly toward the shaft (100) while overcoming the restoring force of the second elastic member (490). When the second part (412) moves, the first part (411) moves toward the shaft (100) by the second part (412) while one side of the second part (412) is in contact with the first surface (411c) of the first part (411). At this time, since the first surface (411c) of the first part (411) and the contact surface of the second part (412) are arranged at an angle, the first part (411) rotates and moves toward the shaft (100). Then, with the groove (G3) and the protrusion (P) aligned, the protrusion (P) is inserted into the groove (G3) of the shaft (100).

[0077] At this time, the first surface (411c) of the first part (411) and the step (ST) of the second cylinder (450) are aligned.

[0078] Figure 8 is a drawing showing a state in which a shaft (100) is restrained by a locking member (400).

[0079] Referring to Fig. 8, when the current supplied to the second coil (470) is released, the second part (412) moves away from the shaft (100), and the first part (411) moves by the restoring force of the second elastic member (490), so that the first surface (411c) of the first part (411) is caught on the step (ST) of the second cylinder (450). Since the second cylinder (450) is fixed, the first part (411) is rotationally restrained to the second cylinder (450). As a result, the shaft (100) is restrained to the first part (411) while the protrusion (P2) is inserted into the groove (G3), thereby performing a parking brake function.

[0080] In this locking part (400), even if the current supplied to the second coil (470) is released, the shaft (100) is prevented from rotating because the first part (411) is caught on the step (ST). Therefore, there is no need to continuously supply power to the locking part (400) to perform the parking brake function.

[0081] When releasing the restraint of the shaft (100), when current is applied again to the second coil (470), the second part (412) of the stopper (410) moves in a straight line toward the shaft (100) while overcoming the restoring force of the second elastic member (490), and lifts the first part (411), thereby separating the first part (411) from the second cylinder (450). At this time, as the first part (411) rotates, the wing part (411b) of the first part (411) is aligned with the gap (X) of the second cylinder (450). Then, when the application of current to the second coil (470) is released, the first part (411) descends, the protrusion (P) comes out of the groove (G3), and the stopper (410) is released from the shaft (100), thereby releasing the restraint of the shaft (100).

[0082] Figure 9 is a drawing showing a locking part (400), a terminal part (600), a wire (700), and a plate (800).

[0083] Referring to FIG. 9, the locking part (400) is fixed to the housing (500). For example, the locking part (400) may be fixed to the first cover (520) of the housing (500) via a plate (800). The plate (800) is coupled to the first cover (520). The case (420) of the locking part (400) may be fixed to the plate (800).

[0084] The locking part (400) is connected to a wire (700). The locking part (400) can be supplied with power and send and receive control signals through the wire (700). Since the wire (700) is connected to the bottom of the locking part (400), a space is required between the case (420) of the locking part (400) and the first cover (510) for the wire (700) to be positioned. A portion of the plate (800) is spaced apart from the first cover (510) to secure a space for the wire (700) to be positioned.

[0085] The wire (700) is guided along the first cover (510) and axially secured by a wire holder (900). The wire holder (900) is arranged along the axial direction. The wire holder (900) may be arranged at an edge of the first cover (510). The wire holder (900) may be an injection-molded molded article.

[0086] A second terminal (620) of the terminal portion (600) can be connected to the end of the wire (700).

[0087] FIG. 10 is a drawing showing a housing body (510) of a housing (500), and FIG. 11 is a drawing showing a first cover (520) of the housing (500).

[0088] Referring to FIGS. 1, 10, and 11, the housing (500) may include a housing body (510), a first cover (520), and a second cover (530). The housing body (510) may be a cylindrical member with one end and the other end open. The first cover (520) is coupled to one end of the housing body (510) to cover the open end of the housing body (510). The second cover (530) is coupled to the other end of the housing body (510) to cover the open end of the housing body (510).

[0089] The housing (500) may include a groove (G). The groove (G) is for accommodating a wire (700). The groove (G) may include a first groove (G1) and a second groove (G2). The first groove (G1) is disposed in the first cover (520). The first groove (G1) may be disposed near an edge of the first cover (520). The first groove (G1) is aligned with the wire holder (900). The second groove (G2) is disposed in the housing body (510). The second groove (G2) may be formed concavely in the housing body (510). The second groove (G2) may be disposed elongated along the axial direction.

[0090] The wire holder (900) is placed in the second groove (G2).

[0091] Figure 12 is a drawing showing the assembly process of the locking part (400).

[0092] Referring to Fig. 12, the locking member (400) is coupled to the first cover (520). The wire holder (900) is also coupled to the first cover (520). The wire (700) is fixed by the wire holder (900).

[0093] A stator (300) is placed in the housing body (510). A bus bar (B) can be fixed on top of the stator (300). The first cover (520) can be assembled to the housing body (510) with the locking part (400), wire holder (900), and wire (700) fixed thereto.

[0094] Fig. 13 is a perspective view showing a plate (800), Fig. 14 is a drawing showing a state in which a locking part (400) is arranged in a housing (500), and Fig. 15 is a side view showing a state in which a wire (700) is arranged.

[0095] Referring to FIGS. 13 and 15, the plate (800) may include a plate body (810) and a leg portion (820). Two leg portions (820) may be connected to each end of the plate body (810). The plate body (810) contacts the case (420) of the lock portion (400). The plate body (810) is spaced apart from the first cover (520). This is to secure a space (SP) for the wire (700) below the lock portion (400).

[0096] The plate body (810) may be circular. A hole (810a) may be arranged in the center of the plate body (810).

[0097] The leg portion (820) is connected to the first cover (520). Due to the height difference between the leg portion (820) and the plate body (810), the leg portion (820) may include a bending area connected to the plate body (810).

[0098] The wire (700) connected to the locking part (400) is guided to the space (SP) secured by the plate (800), and then guided along the bottom of the first cover (520) toward the edge of the first cover (520). The wire (700) guided toward the edge of the first cover (520) is accommodated in the wire holder (900) and guided along the axial direction.

[0099] The second terminal (620) of the terminal section (600) is connected to the end of the wire (700).

[0100] Fig. 16 is a drawing showing a mold part (1000), and Fig. 17 is an enlarged view showing the connection between a wire (700) and a terminal part (600).

[0101] Referring to FIGS. 15 and 16, a mold portion (1000) may be placed on a stator (300). The mold portion (1000) may be an annular member. The mold portion (1000) may be placed on the outside of a bus bar (B).

[0102] The first terminal (610) of the terminal portion (600) is placed in the mold portion (1000). The first terminal (610) may be arranged to extend along the axial direction. The first terminal (610) is connected to an external power source.

[0103] The second terminal (620) is connected to the wire (700). The second terminal (620) may be a movable shunt wire. The second terminal (620) may be connected to the first terminal (610) on the mold portion (1000). The second terminal (620) may be bent toward and connected to the first terminal (610).

[0104] In this way, if the wire (700) connected to the locking part (400) is not exposed to the outside of the housing (500) and is connected to an external power source through the first terminal (610) and the second terminal (620), leakage problems that may occur in the assembly relationship with other parts due to the wire (700) being exposed to the outside can be fundamentally blocked.

[0105] Above, a motor according to a preferred embodiment of the present invention has been specifically examined with reference to the attached drawings.

[0106] 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 to the above shaft; A stator arranged corresponding to the rotor; A locking member arranged on one side of the shaft to restrict rotation of the shaft when necessary; A housing accommodating the stator; Including a terminal portion arranged on the above stator, Including a wire connecting the locking part and the terminal part, A motor in which the wire is arranged along the space between the locking portion and the housing and the space between the stator and the housing and connected to the terminal portion.

2. In paragraph 1, Including a plate placed inside the housing, The above plate is placed in contact with the locking portion so that a space is formed between the housing and the locking portion in the axial direction of the shaft, The above wire is a motor placed in the above space.

3. In paragraph 1, A motor in which a portion of the above shaft and a portion of the above locking member overlap in the axial and radial directions.

4. In paragraph 1, A motor including a stopper that moves axially and contacts the shaft to prevent the shaft from rotating.

5. In paragraph 1, The plate includes a plate body that contacts the locking portion, and a leg portion that extends from the plate body and contacts the housing, The above body is a motor arranged spaced apart from the above housing.

6. In paragraph 1, The above housing includes a groove disposed on the inner surface, A motor in which a portion of the above wire is placed in the above home portion.

7. In paragraph 6, The housing includes a housing body and a first cover coupled to the housing body, The above home portion includes a first home and a second home that are connected to each other, The above first home is arranged in the above first cover, The above second home is a motor arranged in the housing body.

8. In paragraph 7, Including more wire holders, The above wire holder is placed in the second groove, The above wire is a motor placed inside the above wire holder.

9. In paragraph 8, Further comprising a mold portion disposed on the stator, The above terminal portion includes a first terminal and a second terminal that are connected to each other, The above first terminal is placed in the mold portion, The second terminal is disposed on the wire holder and is connected to the wire positioned on the wire holder.

10. In paragraph 9, A motor in which a portion of the mold portion and the wire holder are arranged to overlap radially.

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