CN214171179U

CN214171179U - Brake device for vehicle

Info

Publication number: CN214171179U
Application number: CN202023335233.7U
Authority: CN
Inventors: 申冲植
Original assignee: Hyundai Mobis Co Ltd
Current assignee: Hyundai Mobis Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-10
Anticipated expiration: 2030-12-31

Abstract

A braking device for a vehicle may include: a screw positioned in the caliper body and rotated by power received from the motor part; a nut member configured to cover an outside of the screw rod, engage and couple with the screw rod, and rotate and move toward the brake disc by rotation of the screw rod; an O-ring member disposed in a sealing space of the screw covering the caliper body and contacting the screw; and a gasket member disposed in the sealing space, abutting on the O-ring member on an opposite side of the brake disk, and having a width that increases as a portion of the gasket member facing the O-ring member is away from the O-ring member. Therefore, it is possible to prevent a gap from being formed between the screw and the washer member, thereby preventing damage to the O-ring member that may occur when the O-ring member is inserted into the gap between the screw and the washer member.

Description

Brake device for vehicle

Technical Field

Exemplary embodiments of the present disclosure relate to a brake apparatus for a vehicle, and more particularly, to a brake apparatus for a vehicle capable of preventing damage to an O-ring member.

Background

Generally, an EPB (electronic parking brake) of a vehicle converts a rotational force of a driving motor into a linear motion by using a screw and a nut so as to pressurize a piston. The pressurized pistons press brake pads having friction members against the discs, thereby generating braking force.

In addition to the screw, nut, and piston, the conventional EPB includes a bearing for reducing rotational load and O-rings and gaskets for sealing. However, when the screw and the nut are operated to generate the braking force, the caliper body is elastically deformed to generate an angular difference between a central axis of the screw and a central axis of the caliper body, and gaps are formed between the rear surface of the O-ring and the screw and between the washer and the screw. In this case, the O-ring may be damaged when the O-ring is inserted into a gap between the rear surface of the O-ring and the screw or between the washer and the screw. Therefore, a device capable of solving this problem is required.

Korean patent No. 10-1184575, which was registered at 9, 14, 2012 and entitled "electronic disc brake system", discloses a related art of the present disclosure.

SUMMERY OF THE UTILITY MODEL

Various embodiments relate to a brake apparatus for a vehicle, which can prevent damage to an O-ring member.

In one embodiment, a brake apparatus for a vehicle may include: a screw positioned in the caliper body and rotated by power received from the motor part; a nut member configured to cover an outside of the screw rod, engage and couple with the screw rod, and rotate and move toward the brake disc by rotation of the screw rod; an O-ring member disposed in a sealing space of the screw covering the caliper body and contacting the screw; and a gasket member disposed in the sealing space, abutting on the O-ring member on an opposite side of the brake disk, and having a width that increases as a portion of the gasket member facing the O-ring member is away from the O-ring member.

The gasket member may include: a washer body configured to surround an exterior of the screw; and a gasket inclined member connected to the gasket body and formed in a cylindrical shape having a width that increases as the gasket inclined member is away from the O-ring member. The O-ring member is elastically deformable to correspond to the gasket inclined member during the relative movement between the caliper body and the screw, and pressurizes the gasket inclined member toward the screw.

The gasket inclined member may have an inclined face abutting on the O-ring member.

The gasket inclined member may be formed in a cylindrical shape having a width that increases as the gasket inclined member is spaced apart from the O-ring member. The O-ring member may be elastically deformed along the gasket tilting member and pressurize the gasket tilting member during the relative movement between the caliper body and the screw.

The screw may include: a first screw engaged and coupled with the nut member; a second screw connected to the first screw and the motor part and having an outer portion surrounded by an O-ring part and a washer part; and a third screw extending from an outer periphery of the second screw to an outside of the second screw.

The brake apparatus for a vehicle may further include a piston part installed in a shape covering an outside of the nut part and moving together with the nut part to pressurize the pad member.

The backing block member may include: a back plate arranged to face the piston member and pressurized by the piston member; and a friction member coupled to a surface of the backing plate facing the brake disc.

The piston part may be formed in a cylindrical shape, one side of the piston part, in which the screw is inserted, may be open, and the other side of the piston part, facing the pad member, may be closed.

When the screw is rotated in a predetermined direction, the nut member may be moved toward the brake disk or an opposite side of the brake disk according to the rotation direction of the screw while converting the rotational motion of the screw into linear motion.

The O-ring member is elastically deformable during relative movement between the caliper body and the screw, and pressurizes the washer member toward the screw such that the washer member is in contact with the screw.

In the brake device for a vehicle according to the embodiment of the present disclosure, the washer member may have a width that increases as a portion of the washer member facing the O-ring member is away from the O-ring member. Thus, during relative movement between the caliper body and the screw, the O-ring member may elastically deform to pressurize the washer member toward the screw such that the washer member is in contact with the screw. Therefore, it is possible to prevent a gap from being formed between the screw and the washer member, thereby preventing damage to the O-ring member that may occur when the O-ring member is inserted into the gap between the screw and the washer member.

Drawings

Fig. 1 is a sectional view illustrating a braking apparatus for a vehicle according to an embodiment of the present disclosure.

Fig. 2 is a sectional view showing the main components of fig. 1.

Fig. 3 is a perspective view illustrating a screw, a nut member, an O-ring member, and a washer member of the braking apparatus for a vehicle according to the embodiment of the present disclosure.

Fig. 4 is a half sectional view illustrating a washer member of a braking apparatus for a vehicle according to an embodiment of the present disclosure.

Fig. 5 and 6 are diagrams illustrating an operation of a braking apparatus for a vehicle according to an embodiment of the present disclosure.

Fig. 7A and 7B are diagrams schematically illustrating an O-ring member and a washer member of a braking device for a vehicle according to an embodiment of the present disclosure deformed to prevent a gap from being formed between the washer and the screw.

Detailed Description

Hereinafter, a brake apparatus for a vehicle will be described below by various exemplary embodiments with reference to the accompanying drawings.

It should be noted that the drawings are not precisely to scale and that the thickness of lines or the size of components may be exaggerated for convenience and clarity of description only. Further, terms used herein are defined by considering functions of the present invention, and may be changed according to custom or intention of a user or an operator. Accordingly, the definition of terms should be made in light of the overall disclosure set forth herein.

Fig. 1 is a sectional view showing a brake apparatus for a vehicle according to an embodiment of the present disclosure, fig. 2 is a sectional view showing main components of fig. 1, fig. 3 is a perspective view showing a screw rod, a nut member, an O-ring member, and a washer member of the brake apparatus for a vehicle according to the embodiment of the present disclosure, fig. 4 is a half sectional view showing the washer member of the brake apparatus for a vehicle according to the embodiment of the present disclosure, fig. 5 and 6 are views showing an operation of the brake apparatus for a vehicle according to the embodiment of the present disclosure, and fig. 7A and 7B are views schematically showing that the O-ring member and the washer member of the brake apparatus for a vehicle according to the embodiment of the present disclosure are deformed to prevent a gap from being formed between the washer and the screw rod.

Referring to fig. 1 to 4, a braking apparatus 1 for a vehicle according to an embodiment of the present disclosure includes a screw 100, a nut member 200, an O-ring member 300, a washer member 400, a bearing member 500, and a piston member 600. The screw 100 is positioned in the caliper body 10 and is rotated by power received from the motor part 30. For example, the motor section 30 includes a motor, not shown, and a plurality of gears. Either one of the gears is connected to the motor, and the other one of the gears is connected to the screw 100. The gear receives a rotational force from the motor and rotates the screw 100. At this time, the screw 100 is formed in a rod shape and inserted into the nut member 200. The screw 100 has an external thread 111 formed on an outer side thereof, and is rotated by a rotational force received from a motor.

A sealing member 50 may be installed between the piston part 600 and the caliper body 10. Various types of sealing members may be used as the sealing member 50 as long as the sealing member can perform a sealing action. The sealing member 50 is installed in the cylinder 11 of the caliper body 10 facing the piston part 600.

The nut member 200 covers the outside of the screw 100, engages and is coupled with the screw 100, and moves toward the brake disc 40 while being rotated by the rotation of the screw 100. The nut member 200 has a nut hole 210 formed therein, and the nut hole 210 has an internal thread 211 formed therein, the internal thread 211 being engaged with and coupled to the external thread 111 of the screw 100.

Specifically, when the screw 100 is rotated in a predetermined direction, the nut member 200 is moved toward the brake disk 40 while converting the rotational motion of the screw 100 into a linear motion. In contrast, when the screw 100 is rotated in the opposite direction of the predetermined direction, the nut member 200 is moved toward the opposite side of the brake disk 40.

The O-ring member 300 is disposed in the sealing space 12 to cover the screw 100 of the caliper body 10 and to contact the screw 100. The O-ring member 300 is made of an elastic material. The O-ring member 300 is disposed in the sealing space 12 of the caliper body 10 and is elastically deformed to pressurize the gasket member 400 toward the screw 100 during the relative movement between the caliper body 10 and the screw 100. Thereby, the washer member 400 is in contact with the screw 100.

The gasket member 400 is disposed in the sealed space 12, abuts the O-ring member 300 on the opposite side of the brake disk 40, and has a width that increases as the portion of the gasket member 400 facing the O-ring member 300 is away from the O-ring member 300. At this time, the width indicates the length of the washer member 400 in the Y-axis direction (based on fig. 2).

The gasket member 400 includes a gasket body 410 and a gasket inclination member 420. The washer body 410 surrounds the exterior of the screw 100. The gasket body 410 is formed in a ring shape having a constant width (see fig. 1 to 3).

The gasket inclination member 420 is connected to the gasket body 410, and is formed in a cylindrical shape whose width increases as the gasket inclination member 420 is distant from the O-ring member 300. That is, the washer inclination member 420 is formed in a tapered shape and has a circular hole (not shown) through which the screw 100 passes.

During the relative movement between the caliper body 10 and the screw 100, the O-ring member 300 is elastically deformed to correspond to the gasket inclined member 420, and the gasket inclined member 420 is pressurized toward the screw 100 such that the gasket inclined member 420 is in contact with the screw 100. The gasket inclination member 420 may be made of an elastic material, elastically deformed by pressurization of the O-ring member 300 to be elongated in a direction crossing the screw 100, and contacted with the screw 100. That is, the washer inclination member 420 may be elastically deformed and elongated in the Y-axis direction (based on fig. 5) by the pressurization of the O-ring member 300, and may be in contact with the screw 100.

The gasket inclined member 420 has an inclined surface 421 contacting the O-ring member 300. The gasket tilting member 420 includes a tilting surface 421 contacting the O-ring member 300 and a contact surface 422 contacting the screw 100. The gasket body 410 is also made of an elastic material.

Since the washer inclined member 420 is formed in a cylindrical shape whose width increases as the washer inclined member 420 is distant from the O-ring member 300, the O-ring member 300 may be elastically deformed along the washer inclined member 420 during the relative movement between the caliper body 10 and the screw 100, and the washer inclined member 420 is easily pressurized in the Y-axis direction (based on fig. 5). Accordingly, the washer inclination member 420 may contact the screw 100. Thereby, it is possible to prevent a gap from being formed between the screw 100 and the gasket inclined member 420, which makes it possible to prevent the O-ring member 300 from being inserted into the gap formed between the screw 100 and the gasket inclined member 420. Therefore, the O-ring member 300 can be prevented from being damaged.

The bearing member 500 surrounds the outside of the screw 100 and is disposed to face the O-ring member 300. The bearing member 500 includes a bearing 510 and a bearing plate 520. Bearing 510 surrounds the exterior of screw 100 and facilitates rotation of screw 100. Bearing plates 520 are disposed on either side of the bearing 510 and support the bearing 510.

The screw 100 includes a first screw 110, a second screw 120, and a third screw 130. The first screw 110 is engaged and coupled with the nut member 200. The first screw 110 is formed in a cylindrical shape, and is formed with an external thread 111 on an outer surface thereof, the external thread 111 being engaged with and coupled to the internal thread 211.

The second screw 120 is connected to the first screw 110 and the motor part 30, and the outside of the second screw 120 is surrounded by an O-ring part 300 and a washer part 400. The second screw 120 is formed in a cylindrical shape and has one end connected to the first screw 110 and the other end connected to the motor part 30.

The third screw 130 extends from the periphery of the second screw 120 to the outside to face the bearing member 500. The third screw 130 is formed in a ring shape and faces the bearing plate 520 of the bearing member 500.

The piston member 600 is installed in a shape covering the outside of the nut member 200, and moves together with the nut member 200 to pressurize the pad member 20. By pressurizing the nut member 200 on the cylinder 11 of the caliper body 10, the piston member 600 moves toward the brake disk 40 or the opposite side of the brake disk 40.

The pad member 20 includes a back plate 21 and a friction member 22. The back plate 21 is arranged to face the piston member 600, and is pressurized by the piston member 600. The friction member 22 is coupled to a surface of the back plate 21 facing the brake disc 40. The friction members 22 may be in contact with the brake disk 40.

When the piston member 600 pressurizes the pad member 20, the pad member 20 contacts the brake disc 40 to generate a braking force. That is, when the piston member 600 presses the back plate 21 of the pad member 20, the friction member 22 of the pad member 20 comes into contact with the brake disc 40. The piston member 600 is formed in a cylindrical shape. The side of the piston member 600 where the screw 100 is inserted is open, and the other side of the piston member 600 facing the pad member 20 is closed.

Hereinafter, the operation and effect of the braking device for a vehicle according to the embodiment of the present disclosure will be described with reference to fig. 5 and 7A and 7B.

When a braking force is generated by the brake apparatus 1 for a vehicle, the screw 100 is rotated in a predetermined direction by power received from the motor part 30, and the nut part 200 engaged and coupled with the screw 100 is rotated in the predetermined direction and moved toward the piston part 600.

The nut member 200 is in contact with the inside of the piston member 600, and pressurizes the piston member 600 toward the pad member 20. Accordingly, the piston part 600 may pressurize the pad member 20, and may generate a braking force while the pad member 20 is in contact with the brake disc 40. At this time, the O-ring member 300 around the outer circumference of the screw 100 is elastically deformed to correspond to the gasket inclined member 420 of the gasket member 400, and the gasket inclined member 420 of the gasket member 400 is pressurized toward the screw 100. Thereby, the washer inclined member 420 of the washer member 400 is in contact with the screw 100 (see fig. 5).

When the braking force is released to rotate the screw 100 in the opposite direction of the predetermined direction, the nut member 200 engaged and coupled with the screw 100 is rotated in the opposite direction of the predetermined direction and moved to the opposite side of the piston member 600. That is, the nut member 200 is spaced apart from the piston member 600. Since the pressing of the pad members 20 by the piston parts 600 is released and the pad members 20 do not contact the brake disc 40, the braking force is released. Even at this time, while the O-ring member 300 is elastically deformed to correspond to the gasket inclined member 420 of the gasket member 400, the gasket inclined member 420 of the gasket member 400 is pressed toward the screw 100 and is brought into contact with the screw 100 (see fig. 6).

Further, when the braking force is generated or released as shown in fig. 7A and 7B, that is, during the relative movement between the caliper body 10 and the screw 100, the caliper body 10 is elastically deformed and inclined to form an angle between the axis O' of the caliper body 10 and the rotation axis O of the screw 100, thereby increasing the gap between the screw 100 and the caliper body 10. However, the O-ring member 300 is elastically deformed to correspond to the inclined surface 421 of the gasket inclined member 420, and presses the gasket inclined member 420 toward the screw 100. Thereby, the washer inclination member 420 comes into contact with the screw 100. Thereby, the gap between the gasket inclined member 420 of the gasket member 400 and the screw 100 may be removed to prevent the O-ring member 300 from being inserted into the gap between the screw 100 and the gasket inclined member 420 of the gasket member 400, which makes it possible to prevent the O-ring member 300 from being damaged.

As described above, the washer member 400 of the brake apparatus for a vehicle 1 according to the embodiment of the present disclosure is brought into contact with the screw 100 by pressurization of the O-ring member 300 when a braking force is generated or released, thereby preventing a gap from being formed between the screw 100 and the washer inclined member 420 of the washer member 400. Thereby, it is possible to prevent damage of the O-ring member 300, which may occur when the O-ring member 300 is inserted into the gap between the screw 100 and the washer member 400.

Although the exemplary embodiments of the present disclosure have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the disclosure as disclosed in the accompanying claims.

Claims

1. A brake device for a vehicle, characterized by comprising:

a screw positioned in the caliper body and rotated by power received from the motor part;

a nut member configured to cover an outside of the screw rod, engage and couple with the screw rod, and rotate and move toward a brake disc by rotation of the screw rod;

an O-ring member disposed in a sealing space of the screw covering the caliper body and contacting the screw; and

a washer member disposed in the sealed space, abutting on the O-ring member on an opposite side of the brake disk, and having a width that increases as a portion of the washer member facing the O-ring member is away from the O-ring member.

2. The brake apparatus for a vehicle according to claim 1, wherein the washer member includes:

a washer body configured to surround an exterior of the screw; and

a gasket inclined member connected to the gasket body and formed in a cylindrical shape having a width that increases as the gasket inclined member moves away from the O-ring member,

wherein the O-ring member is elastically deformed to correspond to the gasket inclined member during the relative movement between the caliper body and the screw, and pressurizes the gasket inclined member toward the screw.

3. The braking apparatus for a vehicle according to claim 2, wherein the washer inclined member has an inclined surface abutting on the O-ring member.

4. The braking device for a vehicle according to claim 3, characterized in that the washer inclined member is formed in a cylindrical shape whose width increases as the washer inclined member moves away from the O-ring member, and

the O-ring member is elastically deformed along the gasket tilting member and pressurizes the gasket tilting member during the relative movement between the caliper body and the screw.

5. The brake apparatus for a vehicle according to claim 1, wherein the screw includes:

a first screw engaged and coupled with the nut member;

a second screw connected to the first screw and the motor part and having an exterior surrounded by the O-ring part and the washer part; and

a third screw extending from a perimeter of the second screw to an exterior of the second screw.

6. The brake apparatus for a vehicle according to claim 1, further comprising a piston member that is installed in a shape covering an outside of the nut member and moves together with the nut member to pressurize the pad member.

7. The braking apparatus for a vehicle according to claim 6, wherein the pad member includes:

a back plate arranged to face the piston member and pressurized by the piston member; and

a friction member coupled to a surface of the backing plate facing the brake disc.

8. The brake device for a vehicle according to claim 7, wherein the piston member is formed in a cylindrical shape, one side of the piston member, into which the screw is inserted, is open, and the other side of the piston member, facing the pad member, is closed.

9. The brake apparatus for vehicle according to claim 1, wherein when the screw is rotated in a predetermined direction, the nut member is moved toward the brake disc or an opposite side of the brake disc according to the rotational direction of the screw while converting the rotational motion of the screw into linear motion.

10. The brake device for a vehicle according to claim 1, wherein the O-ring member is elastically deformed during relative movement between the caliper body and the screw, and presses the washer member toward the screw so that the washer member is in contact with the screw.