KR-20260062717-A - BRAKE DEVICE FOR VEHICLE

Abstract

The present invention relates to a braking device for a vehicle, comprising a pedal that can be engaged by a user, a ball head portion connected to the pedal and having a socket groove portion, an operating rod inserted into the socket groove portion and coupled to the ball head portion and moving in conjunction with the engagement of the pedal, and a backup piston that moves inside a backup cylinder according to the movement of the operating rod, wherein the bottom surface of the socket groove portion and the operating rod are spaced apart from each other.

Inventors

• 전준철

Assignees

• 현대모비스 주식회사

Dates

Publication Date

20260507

Application Date

20241029

Claims (6)

1. User-adjustable pedal; A ball head portion connected to the above pedal and having a socket groove portion; An operating rod inserted into the socket groove and coupled to the ball head, and moving in conjunction with the engagement of the pedal; and It includes a backup piston that moves inside the backup cylinder according to the movement of the above operating rod, and A braking device for a vehicle characterized in that the bottom surface of the socket groove and the operating rod are spaced apart from each other.
2. In paragraph 1, The above ball head part A ball head connected to the above pedal; and It includes a socket having a socket groove portion that is connected to the ball head and into which the operating rod can be inserted, and The above operating load is A rod body inserted into the backup piston and pressurizing the backup piston; and It includes a rod protrusion that is connected to the rod body and protrudes in the opposite direction of the backup piston and is inserted into the socket groove, A vehicle braking device characterized in that the depth from the end of the socket to the bottom surface of the socket groove is greater than the length of the rod protrusion.
3. In paragraph 2, A braking device for a vehicle characterized in that the outer diameter of the rod protrusion is smaller than the outer diameter of the rod body so that a rod step is provided at the connection portion between the rod body and the rod protrusion.
4. In paragraph 3, A braking device for a vehicle characterized in that, when the ball head portion and the operating rod are connected, the rod protrusion is inserted into the socket groove portion until the rod step contacts the end of the socket.
5. In paragraph 3, A braking device for a vehicle characterized in that when the end of the socket contacts the rod step, the position of the ball head portion relative to the operating rod is fixed.
6. In paragraph 4 or 5, A braking device for a vehicle characterized in that screw threads are formed on the outer surface of the rod protrusion and the inner surface of the socket groove, respectively, so that the rod protrusion and the socket groove are screw-fastened.

Description

Brake Device for Vehicle The present invention relates to a braking device for a vehicle. Generally, due to the characteristics of electric vehicle braking systems, a device is required that converts the rotational motion of a motor into the linear motion of a piston inside a cylinder to generate brake fluid pressure. A ball screw device, which is a device for converting the rotational motion of a motor into linear motion and comprises a screw shaft that rotates by receiving the rotational force of the motor, a nut that is coupled to the screw shaft via a ball and moves in the axial direction of the screw shaft, and a piston coupled to the nut that pressurizes the working fluid inside the cylinder, is applied to an electric brake device. The background technology of the present invention is disclosed in Korean Published Patent Application No. 10-2021-0064367 (published June 2, 2021; Title of Invention: Hydraulic Unit for Hydraulic Vehicle Brake System). FIG. 1 is a hydraulic circuit diagram showing a vehicle braking device according to one embodiment of the present invention. FIG. 2 is a cross-sectional view showing a backup master cylinder section according to one embodiment of the present invention. Figure 3 is an enlarged view of part A of Figure 2. FIG. 4 is a perspective view showing a first seal cup according to one embodiment of the present invention. FIG. 5 is a cross-sectional view showing a first seal cup according to one embodiment of the present invention. FIG. 6 is a cross-sectional perspective view showing a first seal cup according to one embodiment of the present invention. Figure 7 is an enlarged view of part B of Figure 2. Figure 8 is an exploded perspective view showing part B of Figure 2. FIG. 9 is a drawing showing the area around a piston guard according to one embodiment of the present invention. Figure 10 is an enlarged view of section C of Figure 9. FIG. 11 is a perspective view showing a damper according to one embodiment of the present invention. FIG. 12 is a front view showing a damper according to one embodiment of the present invention. Figure 13 is a cross-sectional view showing BB of Figure 11. Figure 14 is a cross-sectional view showing CC of Figure 11. FIG. 15 is a cross-sectional view showing DD of FIG. 11. FIG. 16 is a drawing showing states A to E in which a damper according to one embodiment of the present invention is deformed by a stopper and a pedal simulator piston. FIG. 17 is a displacement-force graph in states A to E of FIG. 16. Hereinafter, embodiments of a vehicle braking device according to the present invention will be described with reference to the attached drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of explanation. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or convention of the driver or operator. Therefore, the definitions of these terms should be based on the content throughout this specification. FIG. 1 is a hydraulic circuit diagram showing a braking device for a vehicle according to an embodiment of the present invention; FIG. 2 is a cross-sectional view showing a backup master cylinder portion according to an embodiment of the present invention; FIG. 3 is an enlarged view of portion A of FIG. 2; FIG. 4 is a perspective view showing a first seal cup according to an embodiment of the present invention; FIG. 5 is a cross-sectional view showing a first seal cup according to an embodiment of the present invention; FIG. 6 is a cross-sectional perspective view showing a first seal cup according to an embodiment of the present invention; FIG. 7 is an enlarged view of portion B of FIG. 2; FIG. 8 is an exploded perspective view showing portion B of FIG. 2; FIG. 9 is a view showing the area around a piston guard according to an embodiment of the present invention; FIG. 10 is an enlarged view of portion C of FIG. 9; FIG. 11 is a perspective view showing a damper according to an embodiment of the present invention; FIG. 12 is a front view showing a damper according to an embodiment of the present invention; FIG. 13 is a cross-sectional view showing B-B of FIG. 11; and FIG. 14 is FIG. 11 Figure 15 is a cross-sectional view showing C-C, Figure 11 is a cross-sectional view showing D-D, Figure 16 is a diagram showing states A to E in which a damper according to an embodiment of the present invention is deformed by a stopper and a pedal simulator piston, and Figure 17 is a displacement-force graph in states A to E of Figure 16. Referring to FIGS. 1 and 2, a vehicle braking device (1) according to one embodiment of the present invention may include a reservoir (10), a backup master cylinder section (100), a main master cylinder section (30), a motor (M), a first fluid passage section (50), a first valve section (55), a second fluid passage section (60) and a secon