Parking lock apparatus

Abstract

The present invention may provide a parking lock apparatus comprising: a braking motor comprising a rotatable shaft of which one side is exposed to the outside of a housing; a rotation member fixed to one side of the shaft; and a locking portion restricting the rotation of the shaft, wherein the locking portion comprises: a first gear; a second gear arranged in the housing and engaged with the first gear; and a driving portion which rotates the second gear. The first gear is provided with a stopper which is engaged with the rotation member according to the rotation of the first gear.

Description

parking lock device

[0001] The present invention relates to a parking lock device.

[0002] The electronic brake system of a vehicle is a device that brakes the vehicle by the operation of a motor and a reducer. Compared to a mechanical brake system, it is lighter and has excellent responsiveness, and has the advantage of being less restricted in installation space. It is a device that operates automatically using an actuator according to the vehicle's operating status without the driver manually operating it.

[0003] Electronic braking systems may include an electric parking brake function. This parking brake function may be implemented by a configuration in which the braking motor rotates to pull the parking cable, generating tension to expand the shoes inside the DIH (Drum In Hat) of the wheel, thereby securing braking power, or by the motor rotating to advance a piston on a spindle, pushing the pads, thereby bringing the disc and pads into contact, thereby securing braking power.

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

[0005] Accordingly, the purpose of the present invention is to provide a parking lock device that can add a parking brake function to an electronic braking device with a relatively simple configuration.

[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 parking lock device including a braking motor including a rotatable shaft with one side exposed to the outside of a housing, a rotating member fixed to one side of the shaft, and a locking member for restricting rotation of the shaft, wherein the locking member includes a first gear, a second gear disposed in the housing and meshing with the first gear, and a driving member for rotating the second gear, and a stopper is provided on the first gear to mesh with the rotating member according to rotation of the first gear.

[0008] The axial direction of the first gear and the axial direction of the second gear are perpendicular, and the stopper can be engaged with the rotating member.

[0009] The above rotating member includes a body coupled to a shaft and a tooth protruding from the body, the tooth protruding from the body toward the first gear, and the stopper can protrude from the first gear toward the tooth.

[0010] A portion of the above stopper may be arranged to overlap the tooth in the axial direction.

[0011] The housing includes a first part that accommodates the stator, and a second part that is connected to the first part and accommodates the driving unit, and the first gear can be rotatably coupled to the first part, and the second gear can be rotatably coupled to the second part.

[0012] The first part includes a first cover, the first cover includes a first boss portion, and a first shaft portion fixed to the first boss portion and coupled with the first gear, the first shaft portion being capable of being arranged perpendicular to the axial direction.

[0013] The second part may include a second cover, the second cover may include a second boss portion, and the second gear may include a protrusion protruding radially. The second boss portion may include a slot in which the protrusion is arranged, and the slot may include a first surface that contacts the protrusion and restricts rotation of the second gear.

[0014] When the protrusion contacts the first surface, the stopper can engage with the teeth of the rotating member.

[0015] The outer surface of the second cover includes a concavely formed curved portion, and the curved portion can be positioned facing the first cover.

[0016] The stopper includes a first contact surface and a second contact surface that contact the tooth, and the first contact surface and the second contact surface can be arranged to be inclined.

[0017] In the parking state, when a signal is applied to the driving unit, the first gear and the second gear rotate so that the stopper can engage with the teeth.

[0018] 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.

[0019] According to one embodiment of the present invention, by directly restraining the shaft of the braking motor, there is no need for a separate parking brake configuration, thereby reducing the installation space and the number of parts.

[0020] Figure 1 is a drawing showing a parking lock device according to an embodiment;

[0021] Fig. 2 is a side cross-sectional view of the parking lock device illustrated in Fig. 1, and Fig. 3 is an exploded view of the parking lock device illustrated in Fig. 1.

[0022] Figure 3 is an exploded view of the parking lock device illustrated in Figure 1.

[0023] Figure 4 is a perspective view of the rotating member viewed from above.

[0024] Figure 5 is a perspective view of the rotating member viewed from below.

[0025] Fig. 6 is a drawing showing the first cover of the first part of the housing;

[0026] Fig. 7 is a drawing showing a second cover of a second part of the housing;

[0027] Figure 8 is a drawing showing the first gear and the first cover;

[0028] Figure 9 is a drawing showing a stopper,

[0029] Figure 10 is a drawing showing the second gear and the second cover.

[0030] Fig. 11 is a drawing showing the second gear,

[0031] Figure 12 is a drawing showing a state in which the restraint on the shaft is released.

[0032] Figure 13 is a drawing showing a state in which the shaft is restrained by a lock.

[0033] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] FIG. 1 is a drawing illustrating a parking lock device according to an embodiment, FIG. 2 is a side cross-sectional view of the parking lock device illustrated in FIG. 1, and FIG. 3 is an exploded view of the parking lock device illustrated in FIG. 1.

[0043] Referring to FIGS. 1 to 3, a parking lock device according to an embodiment may include a braking motor and a locking member (400). The braking motor may include a shaft (100), a rotor (200), a stator (300), a rotating member (400), and a housing (500).

[0044] 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.

[0045] Below, the parking lock device has the characteristic of having a parking brake function in addition to the vehicle's braking function.

[0046] The shaft (100) can be rotatably supported axially by bearings at both ends of the shaft (100). The shaft (100) can be arranged such that parts with different outer diameters are separated along the axial direction. One side of the shaft (100) is exposed to the outside of the housing (500).

[0047] The rotor (200) rotates through electromagnetic interaction with the stator (300). The rotor (200) may be arranged in correspondence with the stator (300) and may be arranged inside the stator (300). The rotor (200) may include a magnet.

[0048] 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 a magnet of the rotor (200).

[0049] A rotating member (400) is coupled to one side of a shaft (100). The rotating member (400) is arranged on the outside of a housing (500). The rotating member (400) rotates integrally with the shaft (100) as the shaft (100) rotates. The rotating member (400) is coupled to a locking member (600) and serves to selectively restrain the shaft (100) depending on the position of a stopper (630) of the locking member (600). The rotating member (400) is arranged to overlap the rotor (200) in the axial direction.

[0050] The housing (500) includes a first part (510) and a second part (520). The first part (510) accommodates a stator (300). The second part (520) accommodates a driving unit (640). The first part (510) and the second part (520) each form an accommodation space therein. The first part (510) and the second part (520) may be formed such that the accommodation spaces therein are in communication with each other.

[0051] A locking unit (600) is placed in the housing (500). The locking unit (600) 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 (600) can receive power and signals from the outside.

[0052] Figure 3 is a drawing illustrating a locking part (600).

[0053] Referring to FIGS. 2 and 3, the gear may include a first gear (610), a second gear (620), a driving unit (640), and a stopper (630). The first gear (610) and the second gear (620) are always in meshed state with each other. The axis (C1) of the first gear (610) and the axis (C2) of the second gear (620) are arranged to be perpendicular. For example, the first gear (610) and the second gear (620) may be bevel gears whose axes meet at right angles. For example, the first gear (610) and the second gear (620) may be straight bevel gears.

[0054] The first gear (610) is rotatably arranged in the first part (510) of the housing (500). The first gear (610) is arranged and exposed on the outside of the first part (510) of the housing (500). The axial direction of the first gear (610) may be perpendicular to the axial direction of the shaft (100). The first gear (610) is arranged below the rotating member (400).

[0055] The second gear (620) is coupled to the drive shaft (641) of the drive unit (640). The axial direction of the second gear (620) may be the same as the axial direction of the shaft (100). The second gear (620) is exposed and disposed on the outside of the second part (520) of the housing (500).

[0056] The driving unit (640) includes a driving shaft (641), a rotor (200) and a stator (300) coupled to the driving shaft (641), and may include a terminal to which an external power source and a signal are connected. The driving unit (640) is accommodated in the second part (520) of the housing (500). When the driving unit (640) operates, the driving shaft (641) rotates, causing the second gear (620) to rotate. Since the motor according to the embodiment includes the driving unit (640) in this way, there is no need to provide a separate parking brake configuration, thereby reducing the installation space and the number of parts.

[0057] A stopper (630) is placed on the first gear (610). The stopper (630) engages with the rotary member (400) to limit the rotation of the rotary member (400), thereby restraining the shaft (100) and implementing a parking brake function. The stopper (630) protrudes from the outer surface of the first gear (610).

[0058] Figure 4 is a perspective view of the rotating member (400) viewed from above, and Figure 5 is a perspective view of the rotating member (400) viewed from below.

[0059] Referring to FIGS. 4 and 5, the rotating member (400) may include a body (410) coupled with a shaft (100) and a plurality of teeth (420) protruding from the body (410).

[0060] The body (410) may have a cylindrical shape.

[0061] The tooth (420) may protrude axially from the body (410). The tooth (420) may protrude from the body (410) toward the first gear (610). The tooth (420) may have a triangular tooth shape. A plurality of teeth (420) may be arranged radially with respect to the center of the body (410).

[0062] Figure 6 is a drawing showing a first cover (511) of a first part (510) of a housing (500).

[0063] Referring to FIG. 6, the first part (510) of the housing (500) is a cylindrical member with an open upper portion. The open upper portion of the first part (510) may be covered by a first cover (511).

[0064] The first cover (511) may include a first boss portion (511a) and an axial support portion (511b). The annular first cover (511b) forms a space therein for accommodating a bearing (B in FIG. 8).

[0065] The shaft support portion (511b) protrudes radially from the outer surface of the first boss portion (511a). It is coupled to the shaft support portion (511b) arranged in the shaft portion (511c).

[0066] Figure 7 is a drawing showing a second cover (521) of a second part (520) of a housing (500).

[0067] Referring to Fig. 7, the second part (520) of the housing (500) is a cylindrical member with an open upper portion. The open upper portion of the first part (510) may be covered by a second cover (521).

[0068] The second cover (521) may include a second boss portion (521a). The annular second boss portion (521a) forms a space therein for accommodating the lower portion and bearing of the second gear (620).

[0069] The second boss portion (521a) may include a slot (ST). The slot (ST) may be formed concavely on the upper surface of the second boss portion (521a) and may be formed to penetrate the inside and outside of the second boss portion (521a). The slot (ST) is where the protrusion (P of FIG. 11) of the second gear (620 of FIG. 11) is positioned. The protrusion (P) moves within the slot (ST).

[0070] The slot (ST) includes a first surface (S1) corresponding to a side wall of the slot (ST). The first surface (S1) contacts the projection (P) to limit the rotation of the second gear (620). The length of the slot (ST) corresponds to the rotation range of the second gear (620).

[0071] The second cover (521) may include a curved portion (521b) corresponding to the outer surface of the first part (510). The curved portion (521b) is formed concavely on the outer surface of the second cover (521). This curved portion (521b) is positioned facing the first cover (511).

[0072] Figure 8 is a drawing showing the first gear (610) and the first cover (511).

[0073] Referring to Fig. 8, the first gear (610) is rotatably coupled to the shaft portion (511c) of the first cover (511). The first gear (610) can rotate around the shaft portion (511c). A bearing (B) is accommodated inside the first cover (511b).

[0074] Figure 9 is a drawing illustrating a stopper (630).

[0075] Referring to FIG. 9, the stopper (630) may include a first contact surface (T1) and a second contact surface (T2) that come into contact with the tooth (420). The first contact surface (T1) and the second contact surface (T2) are arranged to be inclined. In addition, the stopper (630) may be divided into a first region (A1) and a second region (A2). The first region (A1) is aligned with the first gear (610) in the radial direction of the first gear (610). The second region (A2) is arranged at the rear of the first gear (610), and is a portion of the stopper (630) that protrudes beyond the rear end of the first gear (610).

[0076] The second region (A2) is an area that mainly engages with the teeth (420) of the rotating member (400). The second region (A2) may be arranged to overlap the teeth (420) of the rotating member (400) in the axial direction.

[0077] The stopper (630) has a bar shape.

[0078] These stoppers (630) protrude from the first gear (610) toward the teeth (420).

[0079] Fig. 10 is a drawing illustrating a second gear (620) and a second cover (521). Fig. 11 is a drawing illustrating a second gear (620).

[0080] Referring to FIGS. 7, 10 and 11, the second gear (620) includes a projection (P). The projection (P) protrudes radially from the second gear (620).

[0081] The second gear (620) is located on the inner side of the second boss portion (521a) of the second cover (521). And the tooth (420) portion of the second gear (620) is located on the outer side of the second boss portion (521a). At this time, the protrusion (P) of the second gear (620) is located in the slot (ST) of the second boss portion (521a). When the protrusion (P) contacts the first surface (S1) of the slot (ST), the rotation of the second gear (620) is restricted.

[0082] When the projection (P) touches the first surface (S1) and the rotation of the second gear (620) is restricted, the second gear (620) is restrained, and the driving unit (640) detects the load on it and can stop the operation of the driving unit (640).

[0083] Fig. 12 is a drawing showing a state in which the restraint on the shaft (100) is released, and Fig. 13 is a drawing showing a state in which the shaft (100) is restrained by the locking part (600).

[0084] Referring to FIGS. 2, 3, 7, 12, and 13, when the vehicle is parked and a signal related to the parking brake is input to the drive unit (640), the drive unit (640) operates. When the drive unit (640) operates, the drive shaft (641) rotates. When the drive shaft (641) rotates, the second gear (620) rotates, and the first gear (610) engaged with the second gear (620) rotates.

[0085] When the first gear (610) rotates, the stopper (630) placed on the first gear (610) rotates. As the stopper (630) rotates, it engages with the tooth (420) of the rotating member (400). When the protrusion (P) of the second gear (620) contacts the first surface (S1), the stopper (630) engages with the tooth (420) of the rotating member (400).

[0086] When the stopper (630) engages with the teeth (420) of the rotating member (400), the shaft (100) is restrained together with the rotating member (400) to perform a parking brake function. When the stopper (630) engages with the teeth (420) of the rotating member (400), the current rises to a maximum current value, the current is cut off, and the shaft (100) is restrained without any further current supply to perform a parking brake function.

[0087] Above, a parking lock device according to a preferred embodiment of the present invention has been specifically examined with reference to the attached drawings.

[0088] 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. A braking motor including a rotatable shaft, one end of which is exposed to the outside of the housing; A rotating member fixed to one side of the above shaft; and Including a locking member that restricts rotation of the above shaft, A parking lock device in which the locking member includes a first gear, a second gear disposed in the housing and meshed with the first gear, and a driving member that rotates the second gear, and a stopper is provided on the first gear and meshes with the rotating member according to the rotation of the first gear.

2. In paragraph 1, A parking lock device in which the axial direction of the first gear and the axial direction of the second gear are perpendicular.

3. In paragraph 1, The above rotating member includes a body coupled with a shaft and a tooth protruding from the body, The above tooth protrudes from the above body toward the first gear, The above stopper is a parking lock device that protrudes toward the tooth from the first gear.

4. In paragraph 3, A parking lock device in which a portion of the above stopper is arranged to overlap the above tooth in the axial direction.

5. In paragraph 1, The housing comprises a first part for accommodating the stator, and a second part connected to the first part for accommodating the driving unit, The above first gear is rotatably coupled to the above first part, The above second gear is a parking lock device rotatably coupled to the above second part.

6. In paragraph 5, The above first part comprises a first cover, The above first cover includes a first boss portion and a first shaft portion fixed to the first boss portion and coupled with the first gear, The above first axis portion is a parking lock device arranged perpendicular to the axial direction.

7. In paragraph 6, The second part above includes a second cover, The above second cover includes a second boss portion, The second gear includes a projection protruding radially. The above second boss portion includes a slot in which the protrusion is placed, A parking lock device wherein the slot includes a first surface that contacts the projection and restricts rotation of the second gear.

8. In paragraph 7, When the above protrusion comes into contact with the first surface, The above stopper is a motor that engages with the teeth of the above rotating member.

9. In paragraph 7, The outer surface of the second cover includes a concavely formed curved portion, A parking lock device in which the above curved portion is positioned facing the first cover.

10. In paragraph 1, A parking lock device wherein the stopper includes a first contact surface and a second contact surface that contact the tooth, and the first contact surface and the second contact surface are arranged to be inclined.

11. In paragraph 2, A parking lock device in which, in a parked state, when a signal is applied to the driving unit, the first gear and the second gear rotate so that the stopper engages the teeth.

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