Vehicle parking device

Abstract

To provide a parking apparatus for a vehicle, capable of preventing damage to a parking rod part in a vehicle.SOLUTION: A parking apparatus for a vehicle according to the present invention includes: a driving part; a detent lever part which is connected to a central shaft of the driving part, and which is rotated when the central shaft is rotated; a parking rod part which is linearly moved when the detent lever part is rotated; a sprag part which comes into contact with the parking rod part, and which is moved up and down when the parking rod part is moved; and a parking gear part which is disposed above the sprag part, and which is engaged to be restricted in its rotation when the sprag part is moved up.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a parking device for a vehicle, and more particularly to a parking device for a vehicle that can prevent damage to a parking rod portion in a vehicle. [Background technology]

[0002] The parking device for a vehicle is configured such that when a drive unit is operated, rotation is transmitted to a manual shaft, and a rod assembly lifts up sprags via a manual shaft assembled to the manual shaft.

[0003] When a vehicle is on a slope and then disengages P gear, the parking gear torque generates a strong rotational force due to the vehicle gradient or vehicle weight, causing the parking gear to rotate. If the parking gear is located on one axle, it will rotate at an even faster angular velocity.

[0004] At this time, before the rod assembly reaches a position where it is no longer in the P stage, the sprags ratchet as they try to enter between the parking gear teeth due to the restoring force of the rod spring. This can damage the parking rod and cause a loss of parking function. Therefore, there is a need to improve this.

[0005] The background art of the present invention is disclosed in Korean Patent Publication No. 10-2018-0106184 (published on October 1, 2018, title of invention: vehicle parking device). Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the above problems, and an object of the present invention is to provide a parking device for a vehicle that can prevent damage to the parking rod portion of the vehicle. [Means for solving the problem]

[0007] The vehicle parking device according to the present invention may include a drive unit, a detent lever unit connected to a central shaft of the drive unit and rotating with the rotation of the central shaft, a parking rod unit that moves linearly with the rotation of the detent lever unit, a sprag unit that contacts the parking rod unit and moves up and down with the movement of the parking rod unit, and a parking gear unit that is arranged above the sprag unit and engages with the sprag unit as it rises, thereby restricting its rotation.

[0008] In the present invention, the parking rod portion may include a parking rod transmission portion that engages with the detent lever portion and moves forward and backward by rotation of the detent lever portion, a parking rod body portion that is attached to the parking rod transmission portion and formed along the longitudinal direction of the sprag portion, and a parking rod cam portion that is attached to an end of the parking rod body portion, comes into contact with the sprag portion, and raises and lowers the sprag portion.

[0009] In the present invention, the parking rod cam portion may include a parking rod cam body portion attached to an end of the parking rod body portion and tapered so that the outer diameter decreases as it extends outward from the parking rod body portion, and a parking cam pipe portion attached to the parking rod cam body portion and formed in a cylindrical shape with a smaller outer diameter than the parking rod cam body portion.

[0010] In the present invention, the parking rod cam portion may further include a cam inclined portion formed between the parking rod cam body portion and the parking cam pipe portion and tapered such that an outer diameter thereof decreases as the parking rod cam body portion moves toward the parking cam pipe portion.

[0011] In the present invention, the inclination angle of the cam inclined portion is larger than the inclination angle of the parking rod cam body portion.

[0012] In the present invention, the sprag portion may include a support body portion, a sprag body portion rotatably attached to the support body portion, a sprag contact portion formed on one side of the sprag body portion and contacting the parking rod portion, a sprag protrusion portion formed on the other side of the sprag body portion and inserted into the parking gear portion when the sprag body portion rises, and a sprag stopper portion protruding from the sprag body portion and contacting the parking rod cam body portion.

[0013] In the present invention, the height of the sprag stopper portion protruding from the sprag body portion is configured such that when the sprag stopper portion contacts the parking rod cam body portion, the sprag contact portion and the parking cam pipe portion are spaced apart.

[0014] In the present invention, the sprag stopper portion is formed so as to incline downward from the support body portion toward the sprag contact portion in accordance with the tapered shape of the parking rod cam body portion. [Effects of the Invention]

[0015] According to the vehicle parking device of the present invention, even if ratcheting occurs between the sprag portion and the parking gear portion when the P stage is released, the sprag portion does not come into direct contact with the parking rod body portion of the parking rod portion, and the shape is sturdy so that no impact is applied to the parking rod cam portion of the parking rod portion, allowing normal operation without affecting behavior.

[0016] Furthermore, according to the present invention, the sprag stopper portion of the sprag portion is in line contact with the parking rod cam portion, and parking operation can be achieved without deformation of other parts. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view schematically illustrating a vehicle parking device according to an embodiment of the present invention; [Figure 2]1 is a perspective view showing a schematic configuration of a vehicle parking device according to an embodiment of the present invention; [Figure 3] 1 is a front view schematically showing a vehicle parking device according to an embodiment of the present invention; [Figure 4] 1 is a front view showing a schematic view of the main configuration of a vehicle parking device according to an embodiment of the present invention; [Figure 5] 1 is a front view schematically showing a sprag portion and a parking rod cam portion of a parking rod portion in a vehicle parking device according to an embodiment of the present invention; [Figure 6] 1 is a front view schematically illustrating the operation of a sprag portion and a parking rod cam portion of a parking rod portion in a vehicle parking device according to an embodiment of the present invention; FIG. [Figure 7] 1 is a front view schematically showing a state in which a vehicle parking device according to an embodiment of the present invention is in a P position. [Figure 8] 1 is a front view schematically illustrating a state in which the parking device for a vehicle according to an embodiment of the present invention is released from P gear. [Figure 9] 1 is a front view schematically showing a state in which the vehicle parking device according to one embodiment of the present invention is released from P gear. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of a parking device for a vehicle according to the present invention will be described with reference to the accompanying drawings. In this process, thickness of lines and sizes of components shown in the drawings may be exaggerated for clarity and convenience of explanation.

[0019] In addition, the terms used below are defined in consideration of the functions of the present invention, and may vary depending on the intentions or practices of users or operators. Therefore, the definitions of such terms must be based on the entire contents of this specification.

[0020] FIG. 1 is a perspective view that schematically shows a vehicle parking device according to one embodiment of the present invention, FIG. 2 is a perspective view that schematically shows the main configuration of a vehicle parking device according to one embodiment of the present invention, FIG. 3 is a front view that schematically shows a vehicle parking device according to one embodiment of the present invention, FIG. 4 is a front view that schematically shows the main configuration of a vehicle parking device according to one embodiment of the present invention, FIG. 5 is a front view that schematically shows a sprag portion and a parking rod cam portion of a parking rod portion in a vehicle parking device according to one embodiment of the present invention, FIG. 6 is a front view that schematically shows the operation of the sprag portion and the parking rod cam portion of a parking rod portion in a vehicle parking device according to one embodiment of the present invention, FIG. 7 is a front view that schematically shows a state in which a vehicle parking device according to one embodiment of the present invention is in P stage, FIG. 8 is a front view that schematically shows a state in which a vehicle parking device according to one embodiment of the present invention is released from P stage, and FIG. 9 is a front view that schematically shows a state in which a vehicle parking device according to one embodiment of the present invention is released from P stage.

[0021] 1 to 9, a parking device for a vehicle according to an embodiment of the present invention may include a drive unit 100, a detent lever unit 200, a parking rod unit 300, a sprag unit 400, and a parking gear unit 500.

[0022] The drive unit 100 can be operated by a knob (not shown) attached to the driver's seat. The drive unit 100 is composed of an actuator, a motor, etc., which have a central shaft 110. The central shaft 110 of the drive unit 100 is connected to a detent lever unit 200.

[0023] The detent lever portion 200 is connected to the central shaft 110 of the driving portion 100 and can rotate when the central shaft 110 rotates.

[0024] The detent lever unit 200 can be engaged with the parking rod transmission unit 310 of the parking rod unit 300. A spring prevents the rotated detent lever unit 200 from rotating beyond a set angle and allows the detent lever unit 200 to return to its original position. One side of the spring is fixed to a housing or the like and the other side is connected to the detent lever unit 200.

[0025] The parking rod portion 300 can move linearly by rotating the detent lever portion 200. The parking rod portion 300 meshes with the gear of the detent lever portion 200, and can move linearly forward and backward by rotating the detent lever portion 200.

[0026] The parking rod unit 300 may include a parking rod transmission unit 310, a parking rod body unit 320, and a parking rod cam unit 330. The parking rod transmission unit 310 is engaged with the detent lever unit 200 and can move forward and backward (see FIGS. 1 and 3) by rotation of the detent lever unit 200.

[0027] The parking rod transmission part 310 is made up of a rack gear. Therefore, the parking rod transmission part 310 made up of a rack gear can move linearly forward and backward relative to the rotating detent lever part 200.

[0028] The parking rod body portion 320 is attached to the parking rod transmission portion 310 and is formed as a long body along the longitudinal direction of the sprag portion 400. The parking rod body portion 320 is bent in an L shape to avoid interference with surrounding components.

[0029] The parking rod cam portion 330 is attached to an end portion (the right end portion in FIG. 4 ) of the parking rod body portion 320 and contacts the sprag portion 400 to raise and lower the sprag portion 400. The parking rod cam portion 330 has a surface with different outer diameters that contacts the sprag portion 400 as the parking rod body portion 320 moves forward and backward. Therefore, the sprag portion 400 can be raised and lowered by contacting the parking rod cam portion 330.

[0030] The parking rod cam portion 330 may include a parking cam body portion 331 and a parking cam pipe portion 333. The parking cam body portion 331 is attached to the end portion (the right end portion as viewed in FIG. 2) of the parking rod body portion 320, and has a tapered shape such that the outer diameter decreases as it extends outward from the parking rod body portion 320.

[0031] The parking cam body portion 331 tapers from the end of the parking rod body portion 320 toward the outside (to the right in FIG. 4 ), and the outer diameter thereof decreases. That is, the outer diameter of the parking cam body portion 331 decreases from the parking rod body portion 320 toward the parking cam pipe portion 333. Therefore, the parking cam body portion 331 is formed to slope downward from the parking rod body portion 320 toward the parking cam pipe portion 333.

[0032] The parking cam body portion 331 is tapered so that the outer diameter gradually decreases, and can protect the parking rod portion 300 even if ratcheting occurs due to line contact with the sprag stopper portion 450 of the sprag portion 400.

[0033] The parking cam pipe portion 333 is attached to the parking cam body portion 331 and is formed in a cylindrical shape having a smaller outer diameter than the parking cam body portion 331. The parking cam pipe portion 333 can come into contact with the sprag contact portion 430 of the sprag portion 400.

[0034] The parking rod cam portion 330 may further include a cam inclined portion 335. The cam inclined portion 335 is formed between the parking rod cam body portion 331 and the parking cam pipe portion 333, and has a tapered shape such that the outer diameter decreases from the parking rod cam body portion 331 toward the parking cam pipe portion 333.

[0035] The sprag stopper portion 450 can come into contact with the surface of the cam inclined portion 335. The cam inclined portion 335 has a tapered shape such that the outer diameter decreases from the parking rod cam body portion 331 toward the parking cam pipe portion 333. As the sprag contact portion 430 moves along the surface of the cam inclined portion 335, the contact area and contact time increase, thereby reducing impact.

[0036] The inclination angle (θ1) of the cam inclined portion 335 is formed to be larger than the inclination angle (θ2) of the parking rod cam body portion 331. The inclination angle (θ1) of the cam inclined portion 335 is formed to be larger than the inclination angle (θ2) of the parking rod cam body portion 331, so that the sprag contact portion 430 moves along the surface of the parking rod cam body portion 331 and moves to the cam inclined portion 335, thereby increasing the contact area and contact time of the sprag stopper portion 450 with the parking rod cam body portion 331.

[0037] The sprag portion 400 comes into contact with the parking rod portion 300 and can be raised and lowered by the movement of the parking rod portion 300.

[0038] The sprag portion 400 contacts the parking rod portion 300 and can move up and down by the movement of the parking rod portion 300. The sprag portion 400 can move up and come into contact with the parking gear portion 500 to restrict the rotation of the parking gear portion 500. In other words, when the rotation of the parking gear portion 500 is restricted by the sprag portion 400, the vehicle is in the P gear state.

[0039] When the sprag portion 400 descends and disengages from the parking gear portion 500, the parking gear portion 500 can rotate. In other words, when the sprag portion 400 disengages from the parking gear portion 500, the vehicle is no longer in the P gear state.

[0040] The sprag portion 400 may include a support body portion 410 , a sprag body portion 420 , a sprag contact portion 430 , a sprag projection portion 440 , and a sprag stop portion 450 .

[0041] The support body portion 410 is attached to the housing and is capable of rotatably supporting the sprag body portion 420 .

[0042] One end (the left end as viewed in FIG. 4) of the sprag body portion 420 is rotatably attached to the support body portion 410. The sprag body portion 420 can rotate around the support body portion 410 when the sprag contact portion 430 moves up and down along the contact surface with the parking rod cam portion 330 of the parking rod portion 300.

[0043] The sprag contact portion 430 is formed to protrude from one side (the lower side as viewed in FIG. 4) of the sprag body portion 420 and can contact the parking rod portion 300. The sprag contact portion 430 passes through the parking rod cam body portion 331 and the parking cam pipe portion 333 of the parking rod cam portion 330, allowing the sprag portion 400 to move up and down.

[0044] The sprag contact portion 430 can move from the parking cam pipe portion 333 toward the parking rod cam body portion 331, causing the sprag portion 400 to rise, and can move from the parking rod cam body portion 331 toward the parking cam pipe portion 333, causing the sprag portion 400 to descend.

[0045] The sprag contact portion 430 passes through the parking cam body portion 331 and the parking cam pipe portion 333 of the parking rod cam portion 330, and the sprag body portion 420 of the sprag portion 400 can rise and fall. That is, the sprag contact portion 430 can rise while moving from the parking cam pipe portion 333 toward the parking cam body portion 331, and can fall while moving from the parking cam body portion 331 toward the parking cam pipe portion 333.

[0046] The sprag protrusions 440 are formed to protrude from the other side (upper side in FIG. 4) of the sprag body 420 and are inserted into the parking gear 500 when the sprag body 420 ascends. The sprag protrusions 440 can be disengaged from the parking gear 500 when the sprag body 420 descends. When the sprag protrusions 440 are inserted into the parking gear 500, rotation of the parking gear 500 is restricted.

[0047] The sprag stopper portion 450 protrudes from the lower side of the sprag body portion 420 (see FIG. 2 ) and can come into contact with the parking rod cam body portion 331. The sprag stopper portion 450 is formed so as to incline downward from the support body portion 410 toward the sprag contact portion 430 in accordance with the tapered shape of the parking rod cam body portion 331.

[0048] The sprag stopper portion 450 is in line contact with the parking cam body portion 331, and can protect the parking rod portion 300 even if ratcheting occurs.

[0049] The height (H) of the sprag stopper portion 450 protruding from the sprag body portion 420 is configured so that when the sprag stopper portion 450 contacts the parking rod cam body portion 420, the sprag contact portion 430 and the parking cam pipe portion 333 are spaced apart.

[0050] When the sprag stopper portion 450 contacts the parking rod cam body portion 420, the height (H) of the sprag stopper portion 450 protruding from the sprag body portion 420 is configured to separate the sprag contact portion 430 from the parking cam pipe portion 333, thereby preventing impact and noise caused by contact between the sprag contact portion 430 and the parking cam pipe portion 333.

[0051] The parking gear portion 500 has multiple gears formed on its outer surface and is disposed above the sprag portion 400. When the sprag portion 400 rises, the sprag protrusions 440 of the sprag portion 400 are inserted into and mesh with the gears of the parking gear portion 500, restricting rotation.

[0052] That is, the rotation of the parking gear unit 500 is restricted by the sprag protrusions 440 of the sprag unit 400. When the sprag protrusions 440 are disengaged from the parking gear unit 500, the parking gear unit 500 can rotate. Since the rotation of the parking gear unit 500 is restricted by the sprag protrusions 440 of the sprag unit 400, the parking state of the vehicle can be maintained (P stage state).

[0053] The operation of the vehicle parking device according to one embodiment of the present invention will be described with reference to FIGS.

[0054] 7 is a diagram showing the vehicle parking device in the P position. Referring to FIG. 7, the detent lever unit 200 can be rotated by the drive unit 100. The engagement of the detent lever unit 200 with the parking rod transmission unit 310 of the parking rod unit 300 allows the parking rod body unit 320 to move leftward. As the parking rod body unit 320 moves, the contact position of the sprag protrusions 440 of the sprag unit 400 with the parking cam pipe unit 333 changes.

[0055] That is, as the sprag projections 440 of the sprag members 400 move from the cam body member 331 toward the parking cam pipe member 333, the sprag body member 420 rotates around the support body member 410, allowing the sprag members 400 to descend.

[0056] The sprag stopper portion 450 is formed in accordance with the tapered shape of the parking rod cam body portion 331, and the sprag stopper portion 450 can move while making line contact with the parking rod cam body portion 331.

[0057] Referring to FIG. 9, when the sprag portion 400 is lowered, the sprag projections 440 of the sprag portion 400 can be separated from the parking gear portion 500.

[0058] According to the vehicle parking device of the present invention, even if ratcheting occurs between the sprag portion 400 and the parking gear portion 500 when the P stage is released, the sprag portion 400 does not come into direct contact with the parking rod body portion 320 of the parking rod portion 300, and the shape is sturdy so that no impact is applied to the parking rod cam portion 330 of the parking rod portion 300, allowing normal operation without affecting behavior.

[0059] Furthermore, according to the present invention, the sprag stopper portion 450 of the sprag portion 400 is in line contact with the parking rod cam portion 330, and parking operation can be achieved without deformation of other parts.

[0060] Although the present invention has been described with reference to the illustrated embodiments, these are merely examples, and those skilled in the art will recognize that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of the present invention should be determined by the following claims. [Explanation of symbols]

[0061] 100: Drive unit 110: Central shaft 200: Detent lever part 300: Parking rod part 310: Parking rod transmission part 320: Parking rod body part 330: Parking rod cam part 331: Parking rod cam body part 333: Parking cam pipe section 400: Sprag section 410: Support body part 420: Sprag body part 430: sprag contact portion 440: sprag protrusion portion 450: Sprag stopper part 500: Parking gear part

Claims

1. A drive unit; a detent lever portion connected to a central shaft of the drive portion and rotated by rotation of the central shaft; a parking rod portion that moves linearly in response to rotation of the detent lever portion; a sprag portion that contacts the parking rod portion and moves up and down with the movement of the parking rod portion; a parking gear portion disposed above the sprag portion, the parking gear portion meshing with the sprag portion as the sprag portion rises to limit rotation; The parking rod portion is a parking rod transmission unit that meshes with the detent lever unit and moves forward and backward in response to rotation of the detent lever unit; a parking rod body portion attached to the parking rod transmission portion and formed along the longitudinal direction of the sprag portion; a parking rod cam portion attached to an end of the parking rod body portion, contacting the sprag portion and raising and lowering the sprag portion.

2. The parking rod cam portion is a parking rod cam body portion attached to an end of the parking rod body portion and tapered so that the outer diameter thereof decreases as it extends outward from the parking rod body portion; 2. The vehicle parking device according to claim 1, further comprising: a parking cam pipe portion attached to the parking rod cam body portion and formed in a cylindrical shape having an outer diameter smaller than that of the parking rod cam body portion.

3. The parking rod cam portion is 3. The parking device for a vehicle according to claim 2, further comprising a cam inclined portion formed between the parking rod cam body portion and the parking cam pipe portion, the cam inclined portion having a tapered shape such that an outer diameter thereof decreases as the parking rod cam body portion approaches the parking cam pipe portion.

4. 4. The parking device for a vehicle according to claim 3, wherein the inclination angle of the cam inclined portion is larger than the inclination angle of the parking rod cam body portion.

5. The sprag portion is a support body portion; a sprag body portion rotatably mounted to the support body portion; a sprag contact portion formed on one side of the sprag body portion and contacting the parking rod portion; a sprag projection formed on the other side of the sprag body portion and inserted into the parking gear portion when the sprag body portion is raised; 3. The vehicle parking device according to claim 2, further comprising a sprag stopper portion projecting from said sprag body portion and contacting said parking rod cam body portion.

6. The height by which the sprag stopper portion protrudes from the sprag body portion is 6. The parking device for a vehicle according to claim 5, wherein when the sprag stopper portion contacts the parking rod cam body portion, the sprag contact portion and the parking cam pipe portion are configured to be spaced apart from each other.

7. 6. The parking device for a vehicle according to claim 5, wherein the sprag stopper portion is formed so as to slope downward from the support body portion toward the sprag contact portion in accordance with the tapered shape of the parking rod cam body portion.

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