Parking apparatus for vehicle

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 the manual shaft, and a rod assembly lifts up the sprags via the manual shaft assembled to the manual shaft.

[0003] When a vehicle is on a slope and goes from P gear to P gear release, 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 rotates at an even faster angular velocity.

[0004] At this time, before the rod assembly reaches a position where it is out of the P stage, the sprags ratchet by trying to enter between the parking gear teeth due to the restoring force of the rod spring. The sprags 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 a parking rod portion in a 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 rotation of the central shaft, a parking rod unit that moves linearly with rotation of the detent lever unit, a sprag unit that contacts the parking rod unit and rises and falls with 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 the sprag unit rises, thereby restricting its rotation.

[0008] In the present invention, the parking rod portion can include a parking rod transmission portion that meshes 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, contacts 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 becomes smaller 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 smaller than the outer diameter of 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 size becomes smaller as it goes from the parking rod cam body portion to 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 the sprag contact portion and the parking cam pipe portion are spaced apart when the sprag stopper portion contacts the parking rod cam body portion.

[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. Effect 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 is sturdy in shape so as not to apply any impact 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 the parking operation can be achieved without deformation of other parts. [Brief description of the drawings]

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

[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, the thickness of lines and the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation.

[0019] In addition, the terms described below are defined in consideration of the functions in the present invention, and may vary depending on the intention or practice of the user or operator. Therefore, the definitions of such terms must be based on the entire contents of this specification.

[0020] FIG. 1 is a perspective view showing a vehicle parking device according to one embodiment of the present invention, FIG. 2 is a perspective view showing a main configuration of a vehicle parking device according to one embodiment of the present invention, FIG. 3 is a front view showing a vehicle parking device according to one embodiment of the present invention, FIG. 4 is a front view showing a main configuration of a vehicle parking device according to one embodiment of the present invention, FIG. 5 is a front view showing 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 showing 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 showing a state in which the vehicle parking device according to one embodiment of the present invention is in the P stage, FIG. 8 is a front view showing a state in which the vehicle parking device according to one embodiment of the present invention is released from the P stage, and FIG. 9 is a front view showing a state in which the vehicle parking device according to one embodiment of the present invention has been released from the P stage.

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

[0022] The driving unit 100 can be operated by a knob (not shown) attached to the driver's seat. The driving unit 100 is composed of an actuator having a central shaft 110, a motor, etc. The central shaft 110 of the driving 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 portion 200 can be engaged with the parking rod transmission portion 310 of the parking rod portion 300. The rotated detent lever portion 200 is restricted from rotating beyond a set angle by a spring, and can be returned to its original position by the spring. One side of the spring is fixed to a housing or the like, and the other side is connected to the detent lever portion 200.

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

[0026] The parking rod part 300 may include a parking rod transmission part 310, a parking rod body part 320, and a parking rod cam part 330. The parking rod transmission part 310 meshes with the detent lever part 200 and can move forward and backward (with reference to FIGS. 1 and 3) by the rotation of the detent lever part 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 the 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 into 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 can move the sprag portion 400 up and down by contacting the sprag portion 400. The parking rod cam portion 330 has a surface with different outer diameters that comes into contact with the sprag portion 400 as the parking rod body portion 320 moves forward and backward. Therefore, the sprag portion 400 can move up and down 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 an 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 becomes smaller as it goes outward from the parking rod body portion 320.

[0031] The parking cam body part 331 tapers and has a smaller outer diameter from the end of the parking rod body part 320 toward the outside (to the right in FIG. 4). That is, the parking cam body part 331 has a smaller outer diameter from the parking rod body part 320 toward the parking cam pipe part 333. Therefore, the parking cam body part 331 is formed so as to be inclined downward from the parking rod body part 320 toward the parking cam pipe part 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 an outer diameter smaller than the outer diameter of 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 becomes smaller as it goes from the parking rod cam body portion 331 to 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 becomes smaller from the parking rod cam body portion 331 toward the parking cam pipe portion 333, and 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 the impact.

[0036] The inclination angle (θ1) of the cam inclined portion 335 is formed larger than the inclination angle (θ2) of the parking rod cam body portion 331. Since the inclination angle (θ1) of the cam inclined portion 335 is formed larger than the inclination angle (θ2) of the parking rod cam body portion 331, 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, and the contact area and contact time of the sprag stopper portion 450 in contact with the parking rod cam body portion 331 can be increased.

[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 rise and fall according to the movement of the parking rod portion 300. The sprag portion 400 can rise 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 stage.

[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 in FIG. 4 ) of the sprag body part 420 is rotatably attached to the support body part 410. The sprag body part 420 can rotate about the support body part 410 when the sprag contact part 430 moves up and down along the contact surface with the parking rod cam part 330 of the parking rod part 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 can move the sprag portion 400 up and down through the parking rod cam body portion 331 and the parking cam pipe portion 333 of the parking rod cam portion 330.

[0044] The sprag contact portion 430 can move from the parking cam pipe portion 333 toward the parking rod cam body portion 331 while the sprag portion 400 rises, and can move from the parking rod cam body portion 331 toward the parking cam pipe portion 333 while the sprag portion 400 descends.

[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 descend 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 part 420, and are inserted into the parking gear part 500 when the sprag body part 420 ascends. The sprag protrusions 440 can be removed from the parking gear part 500 when the sprag body part 420 descends. When the sprag protrusions 440 are inserted into the parking gear part 500, the rotation of the parking gear part 500 is restricted.

[0047] The sprag stopper portion 450 protrudes from the lower side (based on FIG. 2) of the sprag body portion 420 and can contact 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 to 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) by which the sprag stopper portion 450 protrudes from the sprag body portion 420 is configured to space the sprag contact portion 430 and the parking cam pipe portion 333 from each other, thereby preventing the generation of impact and noise due to the contact of the sprag contact portion 430 with the parking cam pipe portion 333.

[0051] The parking gear portion 500 has a plurality of gears formed on its outer surface and is disposed above the sprag portion 400. As 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] Fig. 7 is a diagram showing the vehicle parking device in the P stage. Referring to Fig. 7, the detent lever portion 200 can be rotated by the driving portion 100. The detent lever portion 200 can be moved leftward by meshing with the parking rod transmission portion 310 of the parking rod portion 300. The movement of the parking rod body portion 320 causes the contact position of the sprag protrusion portion 440 of the sprag portion 400 with the parking cam pipe portion 333 to change.

[0055] That is, as the sprag projections 440 of the sprag portions 400 move from the cam body portion 331 toward the parking cam pipe portion 333, the sprag body portion 420 rotates about the support body portion 410, allowing the sprag portions 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] 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 is sturdy in shape 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 the parking operation can be achieved without deformation of other parts.

[0060] Although the present invention has been described with reference to the illustrated embodiment, it is merely an example, and a person skilled in the art will understand 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 section 300: Parking rod section 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 projection portion 450: Sprag stopper section 500: Parking gear section

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 comes into contact with the parking rod portion and moves up and down in response to movement of the parking rod portion; a parking gear portion disposed above the sprag portion and meshing with the sprag portion as the sprag portion rises to restrict rotation.

2. The parking rod portion includes: a parking rod transmission portion that meshes with the detent lever portion and moves forward and backward in response to rotation of the detent lever portion; a parking rod body portion attached to the parking rod transmission portion and formed along a longitudinal direction of the sprag portion; 2. The vehicle parking device according to claim 1, further comprising a parking rod cam portion attached to an end of said parking rod body portion, contacting said sprag portion and raising and lowering said sprag portion.

3. 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 of the parking rod cam body portion decreases as the parking rod body portion extends outward; 3. The parking device for a vehicle according to claim 2, 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.

4. The parking rod cam portion is 4. The parking device for a vehicle according to claim 3, 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 size becomes smaller as it goes from the parking rod cam body portion to the parking cam pipe portion.

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

6. The sprag portion includes: A supporting 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 projection formed on the other side of the sprag body portion and inserted into the parking gear portion when the sprag body portion is elevated; 4. The vehicle parking device according to claim 3, further comprising a sprag stopper portion projecting from said sprag body portion and contacting said parking rod cam body portion.

7. The height by which the sprag stopper portion protrudes from the sprag body portion is 7. The parking device for a vehicle according to claim 6, wherein the sprag contact portion and the parking cam pipe portion are configured to be separated from each other when the sprag stopper portion contacts the parking rod cam body portion.

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

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