Parking lock device for vehicle

Abstract

A parking lock device for a vehicle may be provided, the device comprising: a braking motor including first teeth; and a locking unit disposed on the braking motor. The locking unit includes second teeth and a stopper moving in an axial direction. When a signal is applied to the locking unit, the second teeth engage with the first teeth to restrict rotation of the braking motor. The stopper includes a first hole aligned with a rotating member, and the second teeth are arranged in the first hole.

Description

Parking lock device for vehicle

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

[0002] A vehicle's electronic brake system, which brakes the vehicle by operating the vehicle's parking lock and reduction gear, 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 vehicle parking lock device, or by pushing the pad by advancing the piston of the spindle through the rotation of the vehicle parking lock device, thereby bringing the disc and pad into close contact and securing braking power.

[0004] In order to implement an electric parking brake function, an electric parking brake configuration must be added 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 parking lock device for a vehicle in which a parking brake function is added to an electronic braking device, thereby simplifying the configuration of the entire 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 parking lock device for a vehicle, comprising: a braking motor including a first tooth; and a locking part disposed on the braking motor, wherein the locking part includes a second tooth and a stopper that moves in an axial direction, and when a signal is applied to the locking part, the second tooth engages with the first tooth to restrict rotation of the braking motor, the stopper includes a first hole aligned with the rotating member, and the second tooth is disposed in the first hole.

[0008] The first tooth and the second tooth may be arranged to overlap each other in either the axial direction or the direction parallel to the axial direction.

[0009] At least a portion of the above stopper may be arranged to overlap axially with the above braking motor.

[0010] The above braking motor may further include a driving unit connected to the stopper.

[0011] In the parking state, when a signal is applied to the driving unit, the stopper moves to restrict rotation of the braking motor, so that the first tooth and the second tooth can engage.

[0012] The driving unit includes a driving motor unit, a first gear connected to the driving motor unit, a second gear meshed with the first gear, and a screw coupled to the second gear and rotatably arranged on the braking motor, and the stopper is rotatably connected to the screw and can overlap with the screw in the axial direction.

[0013] The above driving unit includes a guide arranged in a direction parallel to the axial direction and coupled to the braking motor, the guide is arranged spaced apart from the screw, and the stopper can be slidably coupled to the guide.

[0014] The first tooth may be arranged on the outer surface of the rotating member, and the second tooth may be arranged on the inner wall of the first hole.

[0015] The first tooth includes a first inclined surface arranged at the bottom in the axial direction, the second tooth includes a second inclined surface and a third inclined surface arranged at the top in the axial direction, the first inclined surface is in contact with the second inclined surface or the third inclined surface, and the inclined direction of the second inclined surface and the inclined direction of the third inclined surface may be different from each other.

[0016] The sizes of the second slope and the third slope may be different from each other.

[0017] The size of the first slope may be larger than the size of the second slope.

[0018] The above braking motor includes a shaft, a rotor coupled to the shaft, a stator arranged to correspond to the rotor, a rotating member coupled to the shaft and including a first tooth, and a housing arranged on the outside of the stator, wherein the housing includes a first part and a second part coupled to the first part, the first part accommodating the shaft, the rotor, and the stator, and the second part accommodating the rotating member, the stopper, and the driving unit.

[0019] The above stopper can be arranged to overlap the stator in the axial direction.

[0020] 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.

[0021] According to one embodiment of the present invention, by directly restraining the shaft of a vehicle parking lock device of an electronic braking device, there is no need to provide a separate parking brake configuration, thereby reducing the installation space and the number of parts.

[0022] Figure 1 is a drawing illustrating a parking lock device for a vehicle according to an embodiment;

[0023] Fig. 2 is a side cross-sectional view of the vehicle parking lock device illustrated in Fig. 1;

[0024] Figure 3 is a bottom view of the vehicle parking lock device illustrated in Figure 1.

[0025] Figure 4 is a drawing showing a rotating member and a locking part.

[0026] Figure 5 is a drawing showing a rotating member;

[0027] Figure 6 is a drawing showing a stopper,

[0028] Figures 7 and 8 are drawings each showing the process of interlocking the first tooth and the second tooth.

[0029] Figure 9 is a drawing showing a state in which the restraint on the shaft is released.

[0030] Fig. 10 is a side view showing the shaft in a restrained state.

[0031] Figure 11 is a plan view showing a state in which the shaft is restrained.

[0032] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] FIG. 1 is a drawing illustrating a vehicle parking lock device according to an embodiment, FIG. 2 is a side cross-sectional view of the vehicle parking lock device illustrated in FIG. 1, and FIG. 3 is a bottom view of the vehicle parking lock device illustrated in FIG. 1.

[0042] Referring to FIGS. 1 to 3, a vehicle parking lock device according to an embodiment includes a braking motor and a locking unit (600). The braking motor may include a shaft (100), a rotor (200), a stator (300), a rotating member (400), and a housing (500).

[0043] Hereinafter, the inner side means a direction arranged toward the shaft (100) of the braking motor based on the radial direction of the braking motor of the vehicle parking lock device, and the outer side means a direction opposite to the inner side. In addition, the circumferential direction and the radial direction are based on the axis center of the braking motor of the vehicle parking lock device.

[0044] Below, the parking lock device for a vehicle has the characteristic of having a parking brake function in addition to the vehicle's braking function.

[0045] The shaft (100) may be rotatably supported at both ends by bearings. The shaft (100) may include portions having different outer diameters, and the portions having different outer diameters may be distinguished along the axial direction.

[0046] The rotor (200) rotates through electrical interaction with the stator (300). The rotor (200) may be positioned corresponding to the stator (300) and may be positioned inside. The rotor (200) may include a magnet.

[0047] The stator (300) is disposed outside the rotor (200). The stator (300) may include a stator core, an insulator, and a coil. The insulator is mounted on the stator core. The coil may be wound around the insulator. The insulator is disposed between the coil and the stator core, electrically insulating the stator core and the coil from each other. The coil induces electrical interaction with the magnet of the rotor.

[0048] A rotating member (400) is coupled to a shaft (100). The rotating member (400) is positioned outside a first part (510) of a housing (500). The rotating member (400) rotates integrally with the shaft (100). The rotating member (400) is coupled to a locking member (600) to selectively restrain the shaft (100) depending on the position of a stopper (630) of the locking member (600). Meanwhile, the rotating member (400) may be positioned to overlap the rotor (200) in the axial direction.

[0049] The housing (500) includes a first part (510) and a second part (520). The first part (510) accommodates a rotor (200) and a stator (300). The second part (520) accommodates a rotating member (400) and a locking member (600). The first part (510) and the second part (520) may be formed such that their respective accommodation spaces are separated from each other.

[0050] 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.

[0051] Figure 4 is a drawing showing a rotating member (400) and a locking member (600).

[0052] Referring to FIG. 4, the locking part (600) may include a stopper (610) and a driving part (620).

[0053] The rotating member (400) is aligned with the first hole (H1) of the stopper (610). The rotating member (400) includes a first tooth (410). And the stopper (610) includes a second tooth (611). The first tooth (410) and the second tooth (611) are interlocked with each other.

[0054] The driving unit (620) may include a driving motor unit (621), a first gear (622), a second gear (623), a screw (624), and a guide (625).

[0055] The first gear (622) is connected to the driving motor unit (621).

[0056] The second gear (623) is connected to the screw (624). The first gear (622) and the second gear (623) mesh with each other. The axial direction of the first gear (622), the axial direction of the second gear (623), and the axial direction of the driving motor unit (621) may be parallel to each other.

[0057] The outer diameter of the second gear (623) may be larger than the outer diameter of the first gear (622). The number of teeth of the second gear (623) may be larger than the number of teeth of the first gear (622).

[0058] The guide (625) is slidably connected to the stopper (610). The longitudinal direction of the guide (625) is the same as the longitudinal direction of the stopper (610).

[0059] Figure 5 is a drawing illustrating a rotating member (400).

[0060] Referring to FIG. 5, the rotary member (400) includes a first tooth (410). The first tooth (410) may be arranged on the outer surface of the rotary member (400). The first tooth (410) may include a first inclined surface (CL1). The first inclined surface (CL1) may be arranged at the lower end of the first tooth (410). The rotary member (400) includes a hole (401) in the center thereof that is coupled to a shaft (100).

[0061] Figure 6 is a drawing showing a stopper (610).

[0062] Referring to FIG. 6, the stopper (610) includes a first hole (H1) and a second tooth (611). The second tooth (611) is arranged along the inner wall of the first hole (H1). The second tooth (611) may include a second inclined surface (CL2) and a third inclined surface (CL3). The second inclined surface (CL2) and the third inclined surface (CL3) may each be arranged at an upper end of the second tooth (611). The second inclined surface (CL2) and the third inclined surface (CL3) may each be in contact with the first inclined surface (CL1) of the first tooth (410).

[0063] The slope direction of the second slope (CL2) and the slope direction of the third slope (CL3) are different from each other. The size of the second slope (CL2) and the size of the third slope (CL3) may be different from each other.

[0064] The stopper (610) may include a second hole (H2) and a third hole (H3).

[0065] The second hole (H2) is arranged spaced apart from the first hole (H1). The second hole (H2) can be arranged between the first hole (H1) and the third hole (H3). The second hole (H2) is where the screw (624) is rotated. When the screw (624) rotates, the stopper (610) moves along the screw (624).

[0066] The third hole (H3) can be positioned apart from the second hole (H2). The third hole (H3) is where the guide (625) is slidably coupled.

[0067] The stopper (610) can be arranged to overlap the stator (300) in the axial direction.

[0068] Figures 7 and 8 are drawings each showing the process of interlocking the first tooth (410) and the second tooth (611).

[0069] Referring to FIGS. 7 and 8, as the stopper (610) moves toward the first tooth (410), the second tooth (611) engages the first tooth (410) in the axial direction of the shaft (100).

[0070] The straight line passing through the intersection point where the second inclined plane (CL2) and the third inclined plane (CL3) meet in the axial direction of the shaft (100) is called the reference line (L).

[0071] As illustrated in FIG. 7, when the lower edge of the first tooth (410) is positioned toward the second inclined surface (CL2) with respect to the reference line (L), in the process of engaging the first tooth (410) and the second tooth (611), the first inclined surface (CL1) comes into contact with the second inclined surface (CL2), and the first tooth (410) moves along the second inclined surface (CL2) of the second tooth (611).

[0072] As illustrated in FIG. 8, when the lower edge of the first tooth (410) is positioned toward the third inclined surface (CL3) with respect to the reference line (L), in the process of engaging the first tooth (410) and the second tooth (611), the first inclined surface (CL1) comes into contact with the third inclined surface (CL3), and the first tooth (410) moves along the third inclined surface (CL3) of the second tooth (611).

[0073] When the size of the second slope (CL2) is larger than the size of the third slope (CL3), during the process of engaging the first tooth (410) and the second tooth (611), the first tooth (410) has a high probability of moving along the second slope (CL2).

[0074] In this way, since the first tooth (410) moves along the second inclined surface (CL2) or the third inclined surface (CL3) of the second tooth (611) depending on the position of the first tooth (410), there is an advantage in that the first tooth (410) and the second tooth (611) are easily engaged.

[0075] Figure 9 is a drawing showing a state in which the restraint on the shaft (100) is released.

[0076] Referring to FIG. 9, in a state where the restraint on the shaft (100) is released, the rotating member (400) is positioned at a first point (P1) based on the axial direction of the shaft (100), and the stopper (610) is positioned at a second point (P2) spaced apart from the rotating member (400) based on the axial direction of the shaft (100).

[0077] The first point (P1) and the second point (P2) are located within the stroke range of the stopper (610).

[0078] Fig. 10 is a side view showing a state in which the shaft (100) is restrained, and Fig. 11 is a plan view showing a state in which the shaft (100) is restrained.

[0079] Referring to FIGS. 10 and 11, when the vehicle is in a parked state and a signal related to the parking brake is input to the drive unit (620), the drive motor unit (621) operates.

[0080] When the driving motor (621) operates, the first gear (622) rotates. When the first gear (622) rotates, the second gear (623) engaged with the first gear (622) rotates. When the second gear (623) rotates, the screw (624) rotates. When the screw (624) rotates, the stopper (610) does not rotate because it is supported by the guide (625), but moves along the screw (624) toward the rotating member (400).

[0081] The stopper (610) moves to the first point (P1), and the second tooth (611) of the stopper (610) engages with the first tooth (410). When the second tooth (611) engages with the first tooth (410), the shaft (100) is restrained.

[0082] When the second tooth (611) of the stopper (610) engages with the first tooth (410) of the rotary member (400), the shaft (100) is restrained together with the rotary member (400) to perform a parking brake function.

[0083] Since the parking lock device for a vehicle according to the embodiment includes a locking part (600) in this way, there is no need to provide a separate parking brake configuration, thereby reducing the installation space and the number of parts.

[0084] Above, a parking lock device for a vehicle according to a preferred embodiment of the present invention has been specifically examined with reference to the attached drawings.

[0085] 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 first tooth; Including a locking part arranged on the above braking motor, The above locking member includes a second tooth and a stopper that moves axially, When a signal is applied to the above locking part, the second tooth engages with the first tooth to restrict the rotation of the braking motor, The above stopper includes a first hole aligned with the rotating member, The above second tooth is a vehicle parking lock device arranged in the above first hole.

2. In paragraph 1, A parking lock device for a vehicle, wherein the first tooth and the second tooth are arranged to overlap each other in either the axial direction or the direction parallel to the axial direction.

3. In paragraph 2, A parking lock device for a vehicle, wherein at least a portion of the stopper is arranged to overlap the braking motor in the axial direction.

4. In paragraph 2, A parking lock device for a vehicle further comprising a driving unit disposed on the braking motor and connected to the stopper.

5. In paragraph 4, A parking lock device for a vehicle in which, when a signal is applied to the driving unit in a parked state, the stopper moves to restrict rotation of the braking motor, so that the first tooth and the second tooth engage.

6. In paragraph 4, The driving unit includes a driving motor unit, a first gear connected to the driving motor unit, a second gear meshed with the first gear, and a screw coupled to the second gear and rotatably arranged on the braking motor. A parking lock device for a vehicle in which the stopper is rotatably connected to the screw and axially overlaps the screw.

7. In paragraph 4, The above driving unit is arranged in a direction parallel to the axial direction and includes a guide coupled to the braking motor, The above guide is placed apart from the screw, A vehicle parking lock device in which the above stopper is slidably connected to the above guide.

8. In paragraph 1, The above first tooth is arranged on the outer surface of the rotating member, The above second tooth is a vehicle parking lock device arranged on the inner wall of the above first hole.

9. In paragraph 1, The first tooth includes a first inclined surface disposed axially downward, The second tooth includes a second inclined surface and a third inclined surface arranged axially at the top, The first inclined surface is in contact with the second inclined surface or the third inclined surface, A parking lock device for a vehicle in which the slope direction of the second slope and the slope direction of the third slope are different from each other.

10. In paragraph 9, A parking lock device for a vehicle, wherein the sizes of the second slope and the third slope are different from each other.

11. In paragraph 9, A parking lock device for a vehicle, wherein the size of the first slope is larger than the size of the second slope.

12. In paragraph 2, The above braking motor includes a shaft, a rotor coupled to the shaft, a stator arranged to correspond to the rotor, a rotating member coupled to the shaft and including a first tooth, and a housing arranged on the outside of the stator. The housing comprises a first part and a second part coupled to the first part, The above first part accommodates the shaft, the rotor, and the stator, The second part is a vehicle parking lock device that accommodates the rotating member, the stopper, and the driving unit.

13. In paragraph 1, A parking lock device for a vehicle in which the above stopper is arranged to overlap the above stator in the axial direction.

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