KR101045915B1 - Car Disc Brake - Google Patents

Abstract

The present invention relates to a disc brake for a vehicle having a wedge member which is moved in the rotational direction of the disc by a drive motor and presses the friction pad against the disc.

The disc brake for a vehicle according to the present invention includes a disc that rotates together with a wheel of a vehicle, a movable friction pad that generates a braking force by friction with one side of the disc, and a movable friction pad attached to one side thereof to generate a power motor. The wedge member moving in the rotational direction of the disk and advancing to the disk side, the guide member guiding the wedge member to move forward to the disk side when the wedge member moves in the rotational direction of the disk, and screwed to the rotating shaft of the drive motor to drive the motor It includes a power transmission member to move in the rotational direction of the disk by the wedge member to the rotational direction side of the disk, the rotating shaft is protruded to both sides of the drive motor, the both ends of the driving motor, respectively, Both ends extend to both sides of the drive motor and the rotating shaft is screwed Since the shaft is provided with each of the shaft mounting holes machined on the inner circumferential surface to be coupled, there is an effect that can be used to move the power transmission member stably while using one drive motor.

Description

Car Disc Brake {DISK BRAKE FOR VEHICLE}

1 is an exploded perspective view of a disc brake for a vehicle according to the present invention.

Figure 2 is a schematic diagram showing a brake release state of the vehicle disk brake according to the present invention.

3 is a schematic view showing a braking state of a disc brake for a vehicle according to the present invention.

Explanation of symbols on the main parts of the drawings

10: disc 20a, 20b: friction pad

30: Caliper Housing 31: Guide Rod

32: finger portion 40: carrier

41: guide hole 50: drive motor

51: rotation shaft 60: wedge member

61: guide groove 70: guide member

80: bearing 90: power transmission member

91: shaft mounting portion 91a: shaft mounting hole

100: cover

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake, and more particularly, to a vehicle disk brake having a wedge member which is moved toward the rotational direction of the disk by a drive motor and presses the friction pad against the disk.

In general, a vehicle disc brake is a device that obtains a braking force by pressing a portion of a disk-shaped disk that rotates with the wheel with friction pads on both sides. During such a disc brake of the vehicle, a disc that rotates together with the wheel of the vehicle, and one side of the disc Friction pads that generate friction and braking force, wedge members that are attached to one side and move in the rotational direction of the disk by a drive motor generating power, and move toward the disk side, and the wedge members move in the rotational direction of the disk. There is a vehicular disk brake that includes a guide member for guiding the wedge member to advance toward the disc so that the wedge member is sandwiched between the disc and the guide member so that a large braking force can be obtained with less power.

In addition, the conventional disc brake for a vehicle is further provided with a power transmission member which allows the wedge member to move in the rotational direction of the disk while moving in the rotational direction of the disk by the drive motor.

As mentioned above, in order to allow the power transmission member to move in the direction of rotation of the disk, a male screw is machined on the rotation shaft of the drive motor, and a shaft mounting hole is provided on the inner circumferential surface of the power transmission member to provide a rotational direction of the rotation shaft. According to the direction, the power transmission member can move forward and backward in the direction of rotation of the disk.

However, such a conventional vehicle disc brake is transmitted a lot of vibration in the friction process with the disk, when moving the power transmission member using a single drive motor, the direction of movement of the power transmission member is changed by the vibration to make the wedge member Difficult to operate stably

Accordingly, in the conventional vehicle disc brake, one drive motor is installed at each end of the power transmission member so as to stably move the power transmission member, and the two drive motors rotate at the same rotational speed but rotate in opposite directions. There is a problem that must be controlled.

The present invention is to solve the above-mentioned problems of the prior art, an object of the present invention is to provide a disc brake for a vehicle capable of stably moving the power transmission member even through one drive motor.

In order to achieve the above object, the present invention provides a disk that rotates together with a wheel of a vehicle, a movable friction pad that generates a braking force by friction with one side of the disk, and the movable friction pad is attached to one surface thereof to provide power. A wedge member moving in the rotational direction of the disk by a driving motor to generate the wedge member, and a guide member for guiding the wedge member forwarding to the disk side when the wedge member moves in the rotational direction of the disk; In the disk brake for a vehicle including a power transmission member is screwed to the rotary shaft of the drive motor is moved in the rotational direction of the disk by the drive motor and the wedge member is moved to the rotational direction side of the disk, the rotation shaft Both ends of the drive motor are machined on both sides of the drive motor. Extrusion and, arranged on both sides of the driving motor, the opposite ends of the power transmitting member, respectively, and is characterized in that the rotary shaft is provided with a female threaded shaft portion is provided with a working axis, each installation hole provided on the inner peripheral surface so that the screw coupling.

In addition, the rear surface of the wedge member, the front surface is disposed toward the disk side is formed to be inclined so as to be symmetrical to both sides with respect to the center side so that both ends of the wedge member is formed in a wedge shape, the front surface of the guide member The center side is formed to be concave to the rear side, characterized in that both sides are formed to be inclined to correspond to the wedge member.

In addition, a guide portion extending from the front center side of the power transmission member to the wedge member side is provided, and a rear surface of the wedge member is provided with a guide groove in which the guide portion is removably received and the wedge member is provided to the power transmission member. It is characterized in that it is installed so as to move forward and backward toward the disk side.

In addition, the wedge member having the movable friction pad is installed on one side of the inner side and the other side is provided with a caliper housing having a fixed friction pad is installed so as to face the movable friction pad, the caliper housing is installed to move forward and backward Characterized in that it further comprises a carrier.

In addition, both sides of the caliper housing is provided with a guide rod extending to the carrier side to be moved forward and backward on the carrier, the carrier is provided with a guide hole for the guide rod is installed to move forward and backward do.

Hereinafter, one preferred embodiment of the present invention will be described in detail with reference to the drawings.

In the disc brake for a vehicle according to the present invention, as shown in FIGS. As a device for obtaining a caliper housing, a pair of friction pads 20a and 20b are disposed opposite to each other, and the caliper housing 30 is fixed to a knuckle portion (not shown) of the vehicle. It includes a carrier 40 that can be installed to move forward and backward.

In order to allow the caliper housing 30 to be installed in the carrier 40 so that the carrier 40 can be moved forward and backward, a pair of guide rods 31 are installed in the carrier 40 so that the caliper housing 30 can be moved forward and backward. It is fixed through a fastening member such as a screw, and the guide hole 41 is provided on both sides of the carrier 40 so that the guide rod 31 can be moved forward and backward.

A friction pad 20a is installed at one side of the caliper housing 30 facing the disk 10 side, and receives the power from the driving motor 50 and moves forward to the disk 10 side so that the friction pad 20a is moved. The wedge member 60 which makes friction with the disk 10, and the front surface directly or indirectly contact the back surface of the wedge member 60, the wedge member when the wedge member 60 moves to the rotation direction side of the disk 10. A guide member 70 for guiding the 60 to move forward to the disk 10 side is disposed, and the other end of the caliper housing 30 is provided with a finger part 32 on which the other friction pad 20b is installed. have. In this embodiment, the friction pad 20a, which is installed on the wedge member 60 among the two friction pads 20a and 20b and moves together with the wedge member 60, is referred to as a movable friction pad 20a. The friction pad 20b provided in the) is called a fixed friction pad 20b.

In addition, a bearing having a plurality of rollers 81 is provided between the front surface of the guide member 70 which is disposed to face each other and the back surface of the wedge member 60 so that the wedge member 60 can be moved more easily. 80 is disposed so that the front surface of the guide member 70 and the rear surface of the wedge member 60 are indirectly supported by each other through the roller 81.

The front surface of the wedge member 60 is disposed in parallel with one side of the disk 10 so that the movable friction pad 20a can be uniformly in contact with one side of the disk 10, the rear of the wedge member 60 The silver is formed to be inclined at a predetermined angle toward the disk 10 so that at least one side end of the wedge member 60 located at the rotational side of the disk 10 forms a wedge shape.

The guide member 70 has a front surface of the back surface of the wedge member 60 so that the wedge member 60 can be guided to move forward to the disk 10 when the wedge member 60 moves in the rotational direction of the disk 10. It is formed to be inclined to correspond to.

Therefore, when the wedge member 60 receives power from the drive motor 50 and moves to the rotational direction side of the disk 10, as shown in FIG. 3, the back surface of the wedge member 60 is formed of the guide member 70. Guided by the front surface and is advanced toward the disk 10, the movable friction pad 20a installed on the wedge member 60 is pressed against one side of the disk 10 to friction with the disk 10 to generate a braking force. In addition, when the movable friction pad 20a is pressed against the disk 10 in this manner, the caliper housing 30 moves backwards away from the wedge member 60 due to the reaction force thereof, and thus the caliper housing 30 The fixed friction pad 20b provided with the finger part 32 is pressed against the other side of the disc 10 and rubs with the other side of the disc 10 to generate a braking force.

In addition, the friction force acting between the movable friction pad 20a and the disk 10 in a state where the movable friction pad 20a is rubbing against one side of the disk 10 is such that the wedge member 60 is a guide member ( 70) Since it acts as a force to fit more strongly between the front surface and one side of the disk 10, it is possible to obtain a large braking force using only a small amount of power.

In the present embodiment, the back surface of the wedge member 60 is formed to be inclined toward the front side so as to be symmetrical to both sides with respect to the center side thereof so that wedge shapes are formed at both side ends of the wedge member 60, respectively, and the guide member 70. The front side of the center side is formed to be concave to the rear side and both sides thereof are formed to be inclined to correspond to the back of the wedge member 60 is to be applied to both the left and right wheels of the vehicle.

In addition, the disc brake for a vehicle according to the present invention includes a power transmission member 90 which allows the rotational movement of the rotational shaft 51 rotated by the drive motor 50 to be converted into a linear movement and transmitted to the wedge member 60. It is provided.

The power transmission member 90 is installed on the rotation shaft 51 of the drive motor 50 to move forward and backward in the axial direction of the rotation shaft 51 by the drive motor 50, and the rotation shaft of the drive motor 50 ( 51, a male screw is machined on the outer circumferential surface, and the power transmission member 90 is provided with a shaft mounting hole 91a in which a female screw is machined on the inner circumferential surface to install the rotary shaft 51, and the power transmission member 90 is the rotary shaft 51. The linear movement can be moved according to the rotation of. In this embodiment, since the power transmission member 90 is capable of moving the wedge member 60 to the rotational direction side of the disk 10, the drive motor 50 has an axial direction of the rotation shaft 51 of the disk 10. It is arranged to be substantially parallel to the tangential direction.

In addition, the wedge member 60 is moved to the rotational direction side of the disk 10 by the power transmission member 90 and advances to the disk 10 side to be able to press the movable friction pad 20a to the disk 10. Therefore, a guide portion 92 extending toward the wedge member 60 is provided at the front center side of the power transmission member 90, and a guide portion 92 is received at the rear side of the wedge member 60 to move forward and backward. The groove 61 is formed concave. Therefore, the wedge member 60 is installed on the power transmission member 90 so that the wedge member 60 can be moved forward and backward through the guide 92 and the guide groove 61, and thus the power transmission member 90 is driven by the drive motor 50. When the wedge member 60 moves to the rotational direction side of 10), the wedge member 60 moves to the rotational direction side of the disk 10 and can move forward to the disk 10 side. Reference numeral “100” is a cover 100 that covers the driving motor 50 and the power transmission member 90 so as to support the power transmission member 90.

In addition, the disc brake for a vehicle according to the present invention has both ends of the rotation shaft 51 of the drive motor 50 so as to stably move the power transmission member 90 through one drive motor 50. Are respectively projected to both sides of the power transmission member 90, the shaft installation hole (91a) is formed in the power transmission member 90 is extended from both ends to the rear side and the female screw is processed so that both ends of the rotary shaft 51 can be screwed respectively. The shaft mounting part 91 provided, respectively is provided.

Therefore, the power transmission member 90 moves in a state where both ends of the power transmission member 90 are respectively installed and supported on the rotation shaft 51 of the drive motor 50, so that the movement of the power transmission member 90 is stable. Since both ends of the power transmission member 90 are installed at both ends of one rotation shaft 51, power can be evenly transmitted to both ends of the power transmission member 90 without any separate control.

As described above in detail, the vehicle disc brake according to the present invention is provided so that the power transmission member for moving the wedge member in a direction parallel to the disk is installed on both ends of the rotating shaft protruding to both sides of one drive motor, There is an effect that can be used to move the power transmission member stably while using the drive motor.

Claims (5)

A rotational direction of the disk by a disk rotating together with a wheel of a vehicle, a movable friction pad that generates a braking force by friction with one side of the disk, and a driving motor to which the movable friction pad is attached and generates power A wedge member moving forward to the disc side, a guide member for guiding the wedge member to move forward to the disc side when the wedge member moves to the rotational direction side of the disc, and screwed to the rotating shaft of the drive motor In a disk brake for a vehicle including a power transmission member which is moved in the rotational direction of the disk by a drive motor and the wedge member is moved in the rotational direction of the disk, Both ends of the rotation shaft are externally threaded to protrude to both sides of the drive motor, and both ends of the power transmission member are disposed on both sides of the drive motor, and shaft mounting holes are provided on the inner circumferential surface thereof so that the rotation shaft is screwed. Disc brake for a vehicle, characterized in that the provided shaft mounting portion. The method of claim 1, The rear surface of the wedge member, the front surface of which is disposed toward the disk side, is formed to be inclined so as to be symmetrical to both sides about the center side thereof so that both ends of the wedge member are formed in a wedge shape, and the front surface of the guide member is the center thereof. The side of the vehicle is a disc brake, characterized in that the side is formed inclined so as to be inclined to correspond to the wedge member. The method of claim 1, A guide portion extending from the front center side of the power transmission member to the wedge member side is provided, and a guide groove is provided at the rear side of the wedge member so that the guide portion can be moved forward and backward and the wedge member is provided on the power transmission member. Disc brake for a vehicle, characterized in that it is installed so as to move forward and backward. The method of claim 1, A caliper housing having a finger portion provided with a wedge member having the movable friction pad installed on one side thereof and a fixed friction pad installed on the other side thereof so as to face the movable friction pad, and a carrier on which the caliper housing can be moved forward and backward. Disc brake for a vehicle further comprising. The method of claim 4, wherein On both sides of the caliper housing is provided with a guide rod extending to the carrier side to be moved forward and backward on the carrier, the carrier is provided with a guide hole for the guide rod is installed to move forward and backward brake.

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