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CN-122003803-A - Parking lock device

CN122003803ACN 122003803 ACN122003803 ACN 122003803ACN-122003803-A

Abstract

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

Inventors

  • SHEN DONGXIAN
  • Pu Hezhen

Assignees

  • LG伊诺特有限公司

Dates

Publication Date
20260508
Application Date
20241113
Priority Date
20231114

Claims (11)

  1. 1. A parking lock device, which comprises a locking mechanism, the parking lock device includes: a brake motor including a first shaft; a rotating member disposed on the first shaft and including teeth, and A locking portion provided on a housing of the motor, Wherein the locking portion 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 The stop is coupled to the tooth in combination with the cam portion to limit rotation of the first shaft.
  2. 2. The parking lock device according to claim 1, wherein the stopper includes a first surface provided to face the rotating member, and a second surface provided to face the cam portion, and The second surface is a curved surface in contact with the cam portion.
  3. 3. The parking lock device according to claim 1, comprising an elastic member provided in the housing and in contact with one side portion of the stopper, Wherein the elastic member is a member having a restoring force when contracted in the rotational direction.
  4. 4. A parking lock device according to claim 3, wherein the curvature of the second surface is smaller than the curvature of the cam portion.
  5. 5. The parking lock device according to claim 3, wherein the housing includes a cam stopper in contact with the cam portion, The cam stop includes a first curved surface and a second curved surface disposed in series, When the cam portion is in contact with the first curved surface, the first surface is in contact with the rotating member, an The first surface is spaced apart from the rotating member when the cam portion is in contact with the second curved surface.
  6. 6. The parking lock device according to claim 5, wherein, when the first surface is in contact with the rotating member, a top dead center of the cam portion is disposed adjacent to the first curved surface, and The top dead center of the cam portion is disposed adjacent to the second curved surface when the first surface is spaced apart from the rotating member.
  7. 7. The parking lock device according to claim 1, wherein the stopper includes a projection facing the rotating member, and The first surface is disposed on the protrusion.
  8. 8. The park 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 angle at a first point of the 1-1 surface, and a 1-3 surface, the 1-3 surface being curved at a second angle at a second point of the 1-1 surface, and The first angle and the second angle are both obtuse angles and are different from each other.
  9. 9. The parking lock device of claim 8, wherein the tooth includes a third surface facing the stop, The third surface comprising a 3-1 surface, a 3-2 surface, the 3-2 surface being curved at a third angle at a third point of the 3-1 surface, and a 3-3 surface, the 3-3 surface being curved at a fourth angle at a fourth point of the 3-1 surface, The third angle and the fourth angle are different from each other, and The third angle is an obtuse angle.
  10. 10. The parking lock device according to claim 9, wherein the 1-2 surface is provided so as to correspond to the 3-3 surface, The 1-3 surface is arranged to correspond to the 3-2 surface, The second point protrudes farther toward the rotating member than the first point, and The fourth point protrudes farther toward the stop than the third point.
  11. 11. The parking lock device according to claim 1, wherein an axial direction of the first shaft and an axial direction of the second shaft are parallel to each other.

Description

Parking lock device Technical Field The present invention relates to a parking lock device. Background An electronic brake device for a vehicle is a device for braking a vehicle by operation of a motor and a decelerator, has advantages of light weight, excellent responsiveness, and less limitation of installation space as compared with a mechanical brake device, and is a device that is automatically operated using an actuator according to the operation state of the vehicle without manual operation by a driver. The electronic braking device may include an electric parking brake function. The parking brake function may be achieved by a configuration in which a brake force is secured by expanding a shoe inside a cap Drum (DIH) brake of a wheel by tension generated by a parking cable pulled by rotation of a brake motor, or by a configuration in which a piston is advanced by rotation of a spindle by the motor to push a pad, thereby bringing a disc and the pad into close contact. However, in order to add the electronic parking brake function to the electronic brake device, there are problems in that installation space requirements are large and the complexity of the configuration of related components such as a decelerator is increased since separate components are required to be added. Disclosure of Invention Technical problem It is therefore an object of the present invention to provide a parking lock device that allows the addition of a parking brake function to an electronic brake device in a relatively simple configuration. The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. Technical proposal According to an embodiment, there may be provided a parking lock device including a brake motor including a first shaft, a rotating member provided on the first shaft and including a tooth portion, and a locking portion provided on a housing of the motor, wherein the locking portion includes a second shaft, a cam portion coupled to the second shaft, and a stopper rotatably coupled to the housing and provided between the rotating member and the cam portion, and coupled to the tooth portion in combination with the cam portion to restrict rotation of the first shaft. The stopper may include a first surface disposed to face the rotating member, and a second surface disposed to face the cam portion, and the second surface may be a curved surface in contact with the cam portion. The parking lock device may include an elastic member provided in the housing and in contact with one side portion of the stopper, and the elastic member may be a member having a restoring force when contracted in the rotational direction. The curvature of the second surface may be less than the curvature of the cam portion. The housing may include a cam stopper in contact with the cam portion, the cam stopper may include a first curved surface and a second curved surface disposed in series, the first surface may be in contact with the rotating member when the cam portion is in contact with the first curved surface, and the first surface may be spaced apart from the rotating member when the cam portion is in contact with the second curved surface. The first surface may be in contact with the rotating member, a top dead center of the cam portion may be disposed 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 may be disposed adjacent to the second curved surface. The stopper may include a protrusion facing the rotation member, and the first surface may be disposed on the protrusion. The first surface may include a 1-1 surface, a 1-2 surface, the 1-2 surface being curved at a first angle at a first point of the 1-1 surface, and a 1-3 surface, the 1-3 surface being curved at a second angle at a second point of the 1-1 surface, and both the first angle and the second angle may be obtuse angles and may be different from each other. The tooth may include a third surface facing the stopper, the third surface may include a 3-1 surface, a 3-2 surface, the 3-2 surface being curved at a third angle at a third point of the 3-1 surface, and a 3-3 surface, the 3-3 surface being curved at a fourth angle at a fourth point of the 3-1 surface, the third angle and the fourth angle may be different from each other, and the third angle may be an obtuse angle. The 1-2 surface may be disposed to correspond to the 3-3 surface, the 1-3 surface may be disposed to correspond to the 3-2 surface, the second point may protrude farther toward the rotational member than the first point, and the fourth point may protrude farther toward the stopper than the third point. The axial direction of the first shaft and the axial direction of the second shaft may be parallel to each other. Advantageous effects According to one embo