Parking lock device

Abstract

The present invention may provide a parking lock device including: a brake motor including a first shaft; a rotating member disposed on the first shaft and including a tooth portion; and a locking unit provided on a housing of the motor, in which the locking unit includes: a second shaft; a cam portion coupled to the second shaft; and a stopper rotatably coupled to the housing and disposed between the rotating member and the cam portion, and engaged with the tooth portion by being coupled to the cam portion, and thereby restricting rotation of the first shaft.

Description

Technical Field

[0001] This invention relates to a parking lock device. Background Technology

[0002] Electronic braking systems are devices that brake a vehicle by operating a motor and a reducer. Compared to mechanical braking systems, electronic braking systems have the advantages of being lightweight, having excellent responsiveness, and being less restricted by installation space. Furthermore, they are devices that operate automatically using actuators based on the vehicle's operating conditions, without requiring manual operation by the driver.

[0003] Electronic braking systems may include an electric parking brake function. This parking brake function can be implemented in a configuration where the tension generated by the parking cable pulled by the rotation of a brake motor causes the shoe inside the DIH (disc-mounted) brake of the wheel to expand, thereby ensuring braking force; or in a configuration where the piston is advanced by the rotation of a motor via a spindle to push a liner, thereby ensuring close contact between the disc and the liner, thereby ensuring braking force.

[0004] However, adding electronic parking brake functionality to electronic braking systems presents challenges due to the need for additional components, resulting in larger installation space requirements and increased complexity in the configuration of related components such as reducers. Summary of the Invention

[0005] Technical issues

[0006] Therefore, the object of the present invention is to provide a parking lock device that allows the addition of parking brake function to an electronic braking device with a relatively simple configuration.

[0007] The problems to be solved by this invention are not limited to those mentioned above, and those skilled in the art will clearly understand other problems not mentioned based on the following description.

[0008] Technical solution

[0009] According to an embodiment, a parking lock device can be provided, comprising: a brake motor including a first shaft; a rotating member disposed on the first shaft and including teeth; and a locking portion disposed on the motor housing, wherein the locking portion includes: a second shaft; a cam portion connected to the second shaft; and a stop member rotatably connected to the housing and disposed between the rotating member and the cam portion, and the stop member and the cam portion being coupled to the teeth to restrict rotation of the first shaft.

[0010] The stop may include: a first surface configured to face the rotating member; and a second surface configured to face the cam portion, and the second surface may be a curved surface in contact with the cam portion.

[0011] The parking lock device may include an elastic member disposed in the housing and in contact with one side of the stop member, and the elastic member may be a member that has a restoring force when contracted in the direction of rotation.

[0012] The curvature of the second surface can be less than the curvature of the cam portion.

[0013] The housing may include a cam stop that contacts the cam portion. The cam stop may include a first curved surface and a second curved surface that are continuously arranged. When the cam portion contacts the first curved surface, the first surface may contact the rotating member, and when the cam portion contacts the second curved surface, the first surface may be spaced apart from the rotating member.

[0014] The first surface can contact the rotating member, the top dead center of the cam portion is set to be adjacent to the first curved surface, and when the first surface is spaced apart from the rotating member, the top dead center of the cam portion can be set to be adjacent to the second curved surface.

[0015] The stop may include a protrusion facing the rotating member, and a first surface may be disposed on the protrusion.

[0016] The first surface may include: a 1-1 surface; a 1-2 surface that is bent at a first point on the 1-1 surface at a first angle; and a 1-3 surface that is bent at a second point on the 1-1 surface at a second angle, wherein the first angle and the second angle may be obtuse angles and may be different from each other.

[0017] The toothed portion may include a third surface facing the stop, the third surface may include: a 3-1 surface; a 3-2 surface that is bent at a third point on the 3-1 surface at a third angle; and a 3-3 surface that is bent at a fourth point on the 3-1 surface at a fourth angle, the third angle and the fourth angle may be different from each other, and the third angle may be an obtuse angle.

[0018] Surface 1-2 can be set to correspond to surface 3-3, surface 1-3 can be set to correspond to surface 3-2, the second point can protrude further toward the rotating member than the first point, and the fourth point can protrude further toward the stop member than the third point.

[0019] The axial directions of the first axis and the second axis can be parallel to each other.

[0020] Beneficial effects

[0021] According to one embodiment of the present invention, by adding a parking brake function to the electronic braking device, the overall configuration of the braking device is simplified.

[0022] According to one embodiment of the invention, by directly limiting the shaft of the brake motor, there is no need to provide a separate parking brake configuration, thus having the advantage of reducing installation space and the number of components.

[0023] According to one embodiment of the present invention, when the upper dead center of the cam portion exceeds the position of the stop member, the stop member is fixed to the housing by receiving the reaction force of the elastic member, thus having the following advantage: even when the drive unit that moves the cam portion is de-energized, the stop member can still restrict the shaft. Attached Figure Description

[0024] Figure 1 This is a view illustrating a parking lock device according to an embodiment.

[0025] Figure 2 It's a diagram. Figure 1 The diagram shows a view of the locking portion of the parking lock device.

[0026] Figure 3 yes Figure 1 The diagram shows an exploded view of the parking lock device.

[0027] Figure 4 This is a view illustrating the teeth of the rotating component.

[0028] Figure 5 This is a view illustrating the teeth of the rotating component.

[0029] Figure 6 This is a view illustrating the stop component.

[0030] Figure 7 This is a plan view of the stop component.

[0031] Figure 8 This is a view illustrating the engagement of the stop and the rotating component.

[0032] Figure 9 This is a view illustrating the cam section and the stop.

[0033] Figure 10 This is a view illustrating the locked portion when the axis is not restricted.

[0034] Figure 11 This is a view illustrating the locked portion when the axis is restricted.

[0035] Figure 12 This is a view illustrating an example of the process of engaging the protrusion of the stop member with the teeth of the rotating member.

[0036] Figure 13 This is a view illustrating another example of the process of engaging the protrusion of the stop with the teeth of the rotating member.

[0037] Figure 14 This is a view illustrating the locking portion when the parking brake function is released and the axle is not restricted. Detailed Implementation

[0038] In the following, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0039] However, the technical concept of the present invention is not limited to the few embodiments described, but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more components in the embodiments can be used by selective combination or substitution.

[0040] Furthermore, unless specifically defined and described, the terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having the meaning commonly understood by one of ordinary skill in the art to which this invention pertains, and commonly used terms such as those defined in dictionaries may be interpreted in light of the contextual meaning of the relevant art.

[0041] The terminology used in the embodiments of this invention is for descriptive purposes only and is not intended to limit the invention.

[0042] In this specification, unless otherwise expressly indicated in the context, the singular form may include the plural form, and when described as “at least one (or one or more) of A, B and / or C”, it may include one or more of all possible combinations of A, B and C.

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

[0044] These terms are used only to distinguish components from other components, and the nature, order, or sequence of components are not limited by these terms.

[0045] Additionally, when a component is described as “connected,” “linked,” or “attached” to another component, the component is not only directly connected, linked, or attached to the other component, but also “connected,” “linked,” or “attached” to the other component when there is another component between the component and the other component.

[0046] Furthermore, when a component is described as being formed or positioned "above" or "below" another component, the term "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 positioned between the two components. Additionally, when a component is described as being "above" or "below," the description can include meanings based on the upward and downward directions of a component.

[0047] Figure 1 This is a view illustrating a parking lock device according to an embodiment. Figure 2 It's a diagram. Figure 1 The diagram shows a view of the locking portion 600 of the parking lock device. Figure 3 yes Figure 1 An exploded view of the locking portion 600 shown in the figure, and Figure 4 The diagram shows an enlarged view of the locking part 600.

[0048] Reference Figures 1 to 4 The parking lock device according to the embodiment may include a brake motor, a rotating member 400, a housing 500, and a locking portion 600. The brake motor may include a first shaft 100, a rotor 200, a stator 300, and a housing 500.

[0049] In the following text, based on the radial direction of the motor, "inner side" refers to the side facing the shaft 100, and "outer side" refers to the side opposite to the inner side. Additionally, in the following text, "circumferential direction" and "radial direction" are defined based on the motor's shaft center.

[0050] In the following text, the parking lock device has the following characteristics: in addition to the vehicle's braking function, it also has a parking brake function.

[0051] Shaft 100 can be rotatably supported by bearings.

[0052] The rotor 200 rotates through electrical interaction with the stator 300. The rotor 200 may be configured to correspond to the stator 300 and may be disposed inside the stator 300. The rotor 200 may include a rotor core 210 and magnets 220 disposed on the rotor core 210.

[0053] The stator 300 is disposed outside 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 to electrically insulate the stator core 310 and the coil 330 from each other. The coil 330 generates electromagnetic interaction with the magnet 220 of the rotor 200.

[0054] A rotating member 400 is coupled to the shaft 100. The rotating member 400 is disposed outside the first housing 500A of the housing 500. As the shaft 100 rotates, the rotating member 400 rotates integrally with the shaft 100. The rotating member 400 engages with the locking portion 600 and is used to selectively restrict the shaft 100 according to the position of the stop 620 of the locking portion 600. The rotating member 400 is configured to overlap with the rotor 200 in the axial direction.

[0055] The housing 500 may include a first housing 500A and a second housing 500B. The first housing 500A has a space formed inside it for accommodating the rotor 200 and the stator 300. A locking portion 600 is disposed outside the first housing 500A. The second housing 500B has a space formed for accommodating the locking portion 600. The second housing 500B may be coupled to the first housing 500A.

[0056] The second housing 500B may include a cover CV that covers an open side. A sealing member SE may be provided on the cover CV.

[0057] The locking part 600 is a device that restricts the rotation of the shaft 100 when a signal is applied while the vehicle is stopped, thereby realizing the parking brake function. The locking part 600 can receive power and signals from the outside.

[0058] The locking part 600 may include a second shaft 610, a cam part 620, a stop 630, and a drive unit 640.

[0059] The second shaft 610 can be the rotation shaft of the drive unit 640. The axial direction of the second shaft 610 can be set to be parallel to the axial direction of the first shaft 100. The second shaft 610 is set to be spaced apart from the first shaft 100.

[0060] The cam portion 620 is connected to the second shaft 610. The cam portion 620 pivots as the second shaft 610 rotates.

[0061] The stop 630 is rotatably connected to the first housing 500A. The axial direction of the stop 630 may be parallel to the axial direction of the first shaft 100. The stop 630 may be disposed radially between the rotating member 400 and the cam portion 620. The stop 630 is used to limit the first shaft 100 by engaging with the rotating member 400. The stop 630 moves in conjunction with the cam portion 620.

[0062] The stop 630 can be connected to the flanged bushing FB.

[0063] The drive unit 640 can be a motor.

[0064] The elastic member 650 is fixed to the second housing 500B. The elastic member 650 may be a torsion spring that has a restoring force when contracted in the direction of rotation. One end of the elastic member 650 is connected to one side of the stop member 630, and the other end of the elastic member 650 is fixed to the second housing 500B to constantly provide a force for rotating the stop member 630.

[0065] Figure 5 This is a view illustrating the teeth 410 of the rotating member 400.

[0066] Reference Figure 4 and Figure 5 The rotating member 400 includes a plurality of teeth 410. The teeth 410 may be disposed on the outer peripheral surface of the rotating member 400.

[0067] The tooth 410 may include a third surface S3 facing the stop 630.

[0068] The third surface S3 may include surface S3a (3-1), surface S3b (3-2), and surface S3c (3-3).

[0069] When viewed in the axial direction, surface S3b of 3-2 bends at a third angle R3 at the third point P3 of surface S3a of 3-1. When viewed in the axial direction, surface S3c of 3-3 bends at a fourth angle R4 at the fourth point P4 of surface S3a of 3-1. The third angle R3 and the fourth angle R4 can be different from each other. The third angle R3 can be an acute angle, and the fourth angle R4 can be an obtuse angle.

[0070] The structure of the toothed part 410 is used to guide the protrusion 631 of the stop 630 to align with the toothed part 410.

[0071] Figure 6 The diagram shows a view of the stop 630, and Figure 7 This is a plan view of stop component 630.

[0072] Reference Figure 6 and Figure 7 The stop member 630 may include a first surface S1 and a second surface S2. The first surface S1 is configured to face the rotating member 400. The second surface S2 is configured to face the cam portion 620.

[0073] The stop member 630 includes a protrusion 631 facing the rotating member 400. A first surface S1 is provided on the protrusion 631.

[0074] The first surface S1 may include surface S1a (1-1), surface S1b (1-2), and surface S1c (1-3).

[0075] When viewed in the axial direction, surface S1b of 1-2 bends at a first point P1 on surface S1a of 1-1 with a first angle R1. When viewed in the axial direction, surface S1c of 1-3 bends at a second point P2 on surface S1a of 1-1 with a second angle R2. The first angle R1 and the second angle R2 can be different from each other. The first angle R1 and the second angle R2 can be obtuse angles.

[0076] The structure of the protrusion 631 is used to guide the protrusion 631 of the stop 630 to align with the tooth 410.

[0077] The stop 630 may include a first hole 632 into which a rotating shaft is inserted. The stop 630 is rotatable about the first hole 632. Additionally, the stop 630 may include a second hole 633 into which one end of the elastic member 650 is inserted and connected. A protrusion 631 may be located on one side of the stop 630 based on the first hole 632, and the second hole 633 may be located on the other side of the stop 630.

[0078] Figure 8 This is a view illustrating the engagement of the stop 630 and the rotating member 400.

[0079] Reference Figure 8 When the protrusion 631 of the stop 630 engages between the teeth 410 of the rotating member 400, surface 1-2 S1b is configured to face surface 3-2 S3b, and surface 1-3 S1c is configured to face surface 3-3 S3c. In this way, when the stop 630 engages with the rotating member 400, the rotation of the rotating member 400 is restricted, thereby restricting the rotation of the first shaft 100.

[0080] Figure 9 This is a view illustrating the cam portion 620 and the stop 630.

[0081] Reference Figure 9 The cam portion 620 rotates about the first axis C1. The stop member 630 rotates about the second axis C2. The cam portion 620 rotates about the first axis C1 when the outer surface of the cam portion 620 is in contact with the second surface S2 of the stop member 630.

[0082] The second surface S2 of the stop 630 can be a concave curved surface facing the cam portion 620. The curvature of the second surface S2 can be greater than the curvature of the cam portion 620.

[0083] As the cam portion 620 rotates counterclockwise as shown in the attached figure, the top dead center T of the cam portion 620 begins to contact the starting point ST of the second surface S2 and moves along the second surface S2 to the ending point ED of the second surface S2. In this way, as the cam portion 620 rotates along the second surface S2, the stop member 630 rotates counterclockwise about the second axis C2.

[0084] Figure 10 This is a view illustrating the locking portion 600 in a state where there is no restriction on axis 100.

[0085] Reference Figure 10 When the vehicle is in motion or when the vehicle is stopped and there is no separate signal, no power is applied to the drive unit 640, and the stop member 630 is held in a state where it is not engaged with the rotating member 400 by the restoring force of the elastic member 650. Additionally, one end of the stop member 630 contacts the cam portion 620. For example, the end of the second surface S2 may contact the cam portion 620.

[0086] The cam portion 620 may include a cam stop 510 disposed on a wall surface of the housing 500. The cam stop 510 may include a first curved surface CV1 and a second curved surface CV2. The first curved surface CV1 is disposed closer to the rotating member 400 than the second curved surface CV2. Furthermore, the first surface CV1 and the second surface CV2 are disposed continuously. A stepped portion D is positioned between the first surface CV1 and the second surface CV2.

[0087] Figure 11 This is a view illustrating the locking portion 600 in a restricted state of axis 100.

[0088] Reference Figure 11 When the vehicle is in the parked state, a signal related to the parking brake is input to apply power to the drive unit 640, causing the second shaft 610 to rotate. As the second shaft 610 rotates, the cam portion 620 rotates. As the cam portion 620 rotates counterclockwise (as shown in the figure), it moves along the second surface S2 of the stop member 630, thereby pushing the stop member 630 towards the rotating member 400 while overcoming the restoring force of the elastic member 650.

[0089] The cam portion 620 is seated on the first curved surface CV1, and when viewed in the axial direction, the top dead center T of the cam portion 620 is located between the second surface S2 and the first curved surface CV1.

[0090] The protrusion 631 of the stop 630 is positioned between the teeth 410 of the rotating member 400, such that the stop 630 and the rotating member 400 engage with each other to restrict the rotation of the first shaft 100.

[0091] Since the stop member 630 is fixed relative to the housing by receiving the reaction force of the elastic member 650 when the upper dead point T of the cam portion 620 exceeds the position of the stop member 630, it has the following advantage: even when the drive unit 640 that moves the cam portion 620 is de-energized, the stop member 630 can still restrict the first shaft 100.

[0092] The process of engaging the stop 630 with the rotating member 400 is as follows.

[0093] Figure 12 This is a view illustrating an example of the process of engaging the protrusion 631 of the stop 630 with the tooth 410 of the rotating member 400.

[0094] Reference Figure 12 When the cam portion 620 rotates and pushes the stop 630, the protrusion 631 contacts the tooth portion 410.

[0095] During the process of bringing the protrusion 631 into contact with the tooth 410, when the second point P2 of the protrusion 631 first contacts the 3-1 surface S3a of the tooth 410, the protrusion 631 moves along the 3-1 surface S3a of the tooth 410 toward the fourth point P4. When the tooth 410 pushes the 3-1 surface S3a, since the third point P3 of the tooth 410 is more radially protruding than the fourth point P4, the rotating member 400 rotates counterclockwise in the figure, and the protrusion 631 enters the space SP1 between the teeth 410, so that the stop 630 engages with the rotating member 400. Here, when viewed in the axial direction, the third point P3 can correspond to one edge of the tooth 310, and when viewed in the axial direction, the fourth point P4 can correspond to the other edge of the tooth 310.

[0096] Figure 13 This is a view illustrating another example of the process of engaging the protrusion 631 of the stop 630 with the tooth 410 of the rotating member 400.

[0097] Reference Figure 13 When the cam portion 620 rotates and pushes the stop 630, the protrusion 631 contacts the tooth portion 410.

[0098] During the process of bringing the protrusion 631 into contact with the tooth 410, when the third point P3 of the tooth 410 first contacts the 1-1 surface S1a of the tooth 410, the protrusion 631 pushes the tooth 410, causing the rotating member 400 to rotate clockwise in the figure. As the rotating member 400 rotates clockwise in the figure, the protrusion 631 enters the space SP2 between the teeth 410, and the stop 630 engages with the rotating member 400.

[0099] Figure 14 This is a view illustrating the locking portion 600 in a state where the parking brake function is released and there is no restriction on the shaft 100.

[0100] Reference Figure 14 When the parking brake function is released, a signal related to the parking brake is input, and power is applied to the drive unit 640, the second shaft 610 rotates in the reverse direction. When the second shaft 610 rotates in the reverse direction, the cam portion 620 also rotates in the reverse direction. As the cam portion 620 in the attached figure rotates clockwise, it rotates along the second surface S2 of the stop member 630, positioning the top dead center T adjacent to the second curved surface CV2. Therefore, the pressure of the cam portion 620 against the stop member 630 is released, and the stop member 630 rotates counterclockwise by the restoring force of the elastic member 650, thereby disengaging the stop member 630 from the rotating member 400. The cam portion 620 is mounted on the second curved surface CV2. Furthermore, the cam portion 620, while mounted on the second curved surface CV2, is pressed by the stop member 630 by the restoring force of the elastic member 650.

[0101] A parking locking device according to an exemplary embodiment of the present invention has been specifically described with reference to the accompanying drawings.

[0102] It should be understood that the above-described embodiments of the present invention are illustrative in all respects and not restrictive, and the scope of the invention will be defined by the appended claims rather than by the preceding detailed description. Therefore, the meaning and scope of the claims, as well as all modifications and variations derived therefrom, should be interpreted as being included within the scope of the invention.

Claims

1. A parking lock device, the parking lock device comprising: A brake motor, the brake motor including a first shaft; A rotating component, the rotating component being disposed on the first shaft and including teeth; as well as A locking portion, wherein the locking portion is disposed on the motor housing, The locking portion includes: a second shaft; a cam portion connected to the second shaft; and a stop member rotatably connected to the housing and disposed between the rotating member and the cam portion. The stop is coupled to the toothed portion in conjunction with the cam portion to restrict the rotation of the first shaft.

2. The parking lock device according to claim 1, wherein, The stop member includes: a first surface configured to face the rotating member; and a second surface configured to face the cam portion. The second surface is a curved surface that contacts the cam portion.

3. The parking locking device according to claim 1, wherein the parking locking device includes an elastic member disposed in the housing and in contact with one side of the stop member. in, The elastic member is a member that has a restoring force when it contracts in the direction of rotation.

4. The parking lock device according to claim 3, wherein, The curvature of the second surface is less than the curvature of the cam portion.

5. The parking lock device according to claim 3, wherein, The housing includes a cam stop that contacts the cam portion. The cam stop includes a first curved surface and a second curved surface that are continuously arranged. When the cam portion contacts the first curved surface, the first surface contacts the rotating member, and When the cam portion contacts the second curved surface, the first surface is spaced apart from the rotating member.

6. The parking lock device according to claim 5, wherein, When the first surface contacts the rotating member, the top dead center of the cam portion is positioned adjacent to the first curved surface, and When the first surface is spaced apart from the rotating member, the top dead center of the cam portion is positioned adjacent to the second curved surface.

7. The parking lock device according to claim 1, wherein, The stop includes a protrusion facing the rotating member, and The first surface is disposed on the protrusion.

8. The parking lock device according to claim 7, wherein, The first surface includes: a 1-1 surface; a 1-2 surface, the 1-2 surface being curved at a first point on the 1-1 surface at a first angle; and a 1-3 surface, the 1-3 surface being curved at a second point on the 1-1 surface at a second angle, and The first angle and the second angle are both obtuse angles and are different from each other.

9. The parking lock device according to claim 8, wherein, The teeth include a third surface facing the stop. The third surface includes: a 3-1 surface; a 3-2 surface, the 3-2 surface being curved at a third point on the 3-1 surface at a third angle; and a 3-3 surface, the 3-3 surface being curved at a fourth point on the 3-1 surface at a fourth angle. The third angle and the fourth angle are different from each other, and The third angle is an obtuse angle.

10. The parking lock device according to claim 9, wherein, The 1-2 surfaces are configured to correspond to the 3-3 surfaces. The 1-3 surfaces are configured to correspond to the 3-2 surfaces. The second point protrudes further toward the rotating member than the first point, and The fourth point protrudes further toward the stop than the third point.

11. The parking lock device according to claim 1, wherein, The axial direction of the first shaft and the axial direction of the second shaft are parallel to each other.

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