KR101285722B1 - braking apparatus for automobile - Google Patents

Abstract

In order to improve the operability by minimizing the rotation radius when the vehicle is parked, the present invention is connected to the first inlet pipe so that the hydraulic oil supplied by pressurized according to the operation of the braking operation unit is introduced, and both sides of the front wheels on the other side in the circumferential direction A front wheel side cylinder to which a pair of outlet pipes connected are connected; A rear wheel side cylinder connected to a second inlet pipe so that the pressurized hydraulic oil flows in, and a right outflow pipe and a left outflow pipe connected to both side brake portions of the rear wheel on the other circumferential direction thereof; A front wheel brake rotating unit interposed inside the front wheel cylinder and having a front wheel braking flow path configured to selectively communicate the first inflow pipe and the outflow pipe as the rotation operation is performed; And a rear wheel braking rotating part interposed inside the rear wheel side cylinder and selectively communicating the second inflow pipe with the right outlet pipe and the left outlet pipe as it is rotated.

Description

Braking apparatus for automobile

The present invention relates to a vehicle braking apparatus, and more particularly, to a vehicle braking apparatus which improves operability by minimizing a rotation radius when a vehicle is parked.

In general, a brake device mounted on a vehicle is largely divided into a main brake used for decelerating and stopping the vehicle while driving and a parking brake for keeping the vehicle parked.

The main brakes are classified into mechanical, hydraulic and pneumatic types according to the mechanism for transmitting the pedaling force generated when the user presses the pedal to each wheel.

Here, the double hydraulic brake is most widely used due to the advantage that the braking force is equally transmitted to all the wheels so that the friction loss is low and the operating force can be reduced.

In addition, the hydraulic brake is a direct type that directly transmits the pedaling force generated when the user presses the brake pedal to each wheel, and the pedaling force is boosted by using the negative pressure or air pressure by vacuum. The double power brake system can exert a large braking force even with a relatively small force, and its adoption is becoming more common in recent years.

1 is an exemplary view showing a conventional hydraulic brake device.

As shown in FIG. 1, the conventional hydraulic brake device has a structure in which all of the lines 171, 172, 173, and 174 which transfer hydraulic pressure to the four wheel brake discs 191, 192, 193, and 194 of the vehicle are connected to a port 160 connected to one hydraulic pump 150. Achieved. Therefore, when the brake pedal is pressed, the braking force is uniformly transmitted to all the wheels to stop the vehicle.

However, such a brake system has a problem in that the radius of rotation cannot be minimized when the vehicle is rotated while parking or in a narrow alley.

Korea Patent Registration No. 10-428146

In order to solve the above problems, the present invention is to provide a vehicle braking device that improves operability by minimizing the rotation radius when the vehicle parking.

In order to solve the above problems, the present invention is connected to the first inlet pipe so that the hydraulic fluid supplied by pressurized by the operation of the braking operation unit is introduced, a pair of outflow pipes connected to both sides of the front brake of the front wheel in the other circumferential direction Front wheel side cylinder connected; A rear wheel side cylinder connected to a second inlet pipe so that the pressurized hydraulic oil flows in, and a right outflow pipe and a left outflow pipe connected to both side brake portions of the rear wheel on the other circumferential direction thereof; A front wheel brake rotation unit interposed inside the front wheel cylinder and having a front wheel brake flow path for selectively communicating the first inflow pipe and the pair of outflow pipes as the rotation operation is performed; And a rear wheel braking rotating part interposed inside the rear wheel side cylinder and selectively communicating the second inflow pipe with the right outlet pipe and the left outlet pipe as it is rotated.

Here, the rear wheel brake rotation portion is formed in a multi-stage by partitioning both side supply inlet, left supply inlet, and right supply inlet in communication with the first inlet tube on one side of the outer side of the solid cylindrical body, the solid cylindrical body outer periphery A left side supply outlet and a right side supply outlet which are selectively communicated with the right side outlet pipe and the left side outlet pipe are formed on the other side, and the two side supply inlets and the left side supply inlet are formed inside the solid cylindrical body. It is preferable that the left through passage connecting to and the right through passage connecting the both side supply inlet and the right side supply inlet with the right side supply outlet.

And, as the rear wheel brake rotation unit and the front wheel brake rotation unit are rotated in the parking mode, the pair of outlet pipes connected to the front wheel cylinders is shielded, and the right outlet pipe and the left outlet pipes connected to the rear wheel cylinders are shielded. It is preferable that any one side is in communication with the corresponding supply outlet and the other side is shielded.

In addition, the rear wheel brake rotating unit and the front wheel braking rotating unit are preferably connected in a line with each other.

In this case, it is preferable that the rear wheel brake rotating unit and the front wheel braking rotating unit are connected to a rotating operation unit providing a rotational force according to the operation of the driver's seat.

According to the present invention, when the rear wheel brake rotation unit and the front wheel brake rotation unit are rotated in the parking mode, the hydraulic fluid is shielded from the front wheel disc brake without supplying the hydraulic fluid and the rear wheel disc brake is supplied to only one of the left and right sides. do. Therefore, when rotating or parking in a narrow space, the remaining three wheels are rotated while only one side of the rear wheel is braked, thereby minimizing the radius of rotation, thereby enabling stable rotation and parking.

1 is an exemplary view showing a conventional hydraulic brake device.
Figure 2 is a schematic diagram of a vehicle braking device according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of a vehicle braking device according to an embodiment of the present invention.
4 is a perspective view of the vehicle braking device in a running state according to an embodiment of the present invention;
Figure 5 is a perspective view of the brake in the braking state of the rear wheel left wheel of the vehicle braking device according to an embodiment of the present invention.
Figure 6 is a perspective view in the braking state of the rear wheel right wheel of the vehicle braking device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a vehicle braking device according to an embodiment of the present invention.

2 is a schematic view of a vehicle braking apparatus according to an embodiment of the present invention, Figure 3 is an exploded perspective view of a vehicle braking apparatus according to an embodiment of the present invention.

As shown in FIGS. 2 and 3, the vehicle braking device includes a front wheel side cylinder 40, a rear wheel side cylinder 20, a front wheel braking rotation unit 30, and a rear wheel braking rotation unit 10.

Here, the front wheel side cylinder 40 is a first inlet pipe on one side so that the hydraulic oil pressurized by the master cylinder 71 is supplied in accordance with the operation of the braking operation unit (not shown) made of a braking pedal, etc. disposed in the driver's seat. And a pair of outlet pipes 42 and 43 connected to the braking part including the disc brakes 75, 76, 77 and 78 disposed on both sides of the front wheel on the other circumferential direction.

In addition, the rear wheel side cylinder 20 is connected to the second inlet pipe 21 so that the hydraulic oil supplied to the pressurized side on one side, the right outflow pipe 23 which is connected to both side brake portions of the rear wheel on the other side in the circumferential direction, respectively. ) And the left outlet pipe 22 is connected.

The front wheel side cylinder 40 and the rear wheel side cylinder 20 are formed in a hollow cylindrical shape, and the front wheel brake rotation part 30 and the rear wheel brake rotation part 10 are rotatably inserted therein, respectively. In this case, the dimension tolerance between the inner diameter of the front wheel side cylinder 40 and the rear wheel side cylinder 20 and the outer diameter of the front wheel brake rotation part 30 and the rear wheel brake rotation part 10 is preferably set to 0.1 ~ 0.2 mm or less. . In such a range that the dimensional tolerance is maintained, smooth rotation of the front wheel side cylinder 40 and the rear wheel side cylinder 20 is ensured, and the hydraulic oil flows out through the gap between the inner diameter and the outer diameter due to the resistance due to the viscosity of the hydraulic oil. Range can be minimized.

In addition, an outer ring formed on the outer circumference of each of the front wheel brake rotation part 30 and the rear wheel brake rotation part 10 is interposed with an O-ring 5 through a gap between the front wheel cylinder 40 and the rear wheel cylinder 20. It is desirable to prevent the hydraulic oil from leaking.

As illustrated, the rear wheel brake rotation unit and the front wheel brake rotation unit are preferably connected in series, but in the case of a large vehicle, when the flow capacity of the hydraulic fluid for braking is increased, they may be arranged in parallel as separate parts. That is, the front wheel brake rotation part and the front wheel side cylinder and the rear wheel brake rotation part and the rear wheel side cylinder are provided to be parallel to each other separately and may be connected to the rotation control part, respectively.

And, when provided in line with each other connected to the rotation control unit 55 is connected to a drive motor (not shown) that provides a rotational force to rotate the rear wheel brake rotation unit and the front wheel brake rotation unit at a set angle according to the operation of the driver's seat is connected. do. At this time, the front wheel cylinder 40 and the rear wheel cylinder 20 is constrained to the frame to maintain a fixed state.

On the other hand, the front wheel brake rotation unit 30 and the rear wheel brake rotation unit 10 are each made of a solid cylindrical, the flow path for guiding the movement of the hydraulic oil is formed through.

That is, the front wheel brake rotation part 30 is interposed inside the front wheel side cylinder 40 and rotates therein, so that the operating oil is supplied from the guide groove 31 selectively communicating with the first inlet pipe 41. A front wheel braking passage 32 is formed to branch from side to side and selectively communicate with the outlet pipes 42 and 43.

In addition, the rear wheel brake rotation unit 10 is interposed inside the rear wheel cylinder 20, and rotates the second inlet pipe 21 to the right outlet pipe 23 and the left outlet pipe 22 as the rotary operation is performed. Selectively communicate with.

In detail, the rear wheel braking rotating portion is divided into two side supply inlets 11, a left supply inlet 12, and a right supply inlet 13, which are selectively communicated with the first inlet tube on one side of the solid cylindrical body. The groove is formed in a multistage fashion along the circumferential direction.

Here, the both side supply inlet 11 is a groove extending left and right, the center portion is selectively communicated with the second inlet pipe 21 described above, the left through hole (11a) formed at both ends of the both side supply inlet (11) ) And the right through hole 11b penetrate the left through passage 15a and the right through passage 15b through the left feed outlet 17 and the right feed outlet 18 disposed on the outer circumference of the solid cylindrical body, respectively. Connected.

In addition, the left supply inlet 12 is a groove extending to the left side, the right end thereof is selectively communicated with the second inlet pipe 21, and the left hole 12a formed at the left end thereof is the left through passage 15a. It is connected to the left supply outlet 17 through).

The right supply inlet 13 is a groove extending to the right, and its left end is selectively communicated with the second inlet pipe 21, and the right hole 13a formed at the right end thereof is the right through passage 15b. It is connected to the right supply outlet 18 through.

Referring to the operation of the vehicle braking device in detail as follows.

In detail, Figure 4 is a perspective view of the vehicle in the driving state of the braking device according to an embodiment of the present invention.

As shown in FIG. 4, in a state in which the rotary operation unit is operated in a running state, the first inflow pipe 41 communicates with the guide groove 31 and the front wheel braking flow path 32 to supply hydraulic oil to both outflow pipes 42 and 43. To achieve a state of supply. Therefore, when a braking operation unit such as a braking pedal is operated, hydraulic oil may be supplied to the outlet pipes 42 and 43 through the inlet pipe 41 to selectively brake the wheels on both sides of the front wheels.

On the other hand, in the rear wheel, the second inflow pipe 21 communicates with the left through passage 15a and the right through passage 15b through the left through 11a and the right through 11b via both side supply inlets, In this case, the hydraulic fluid may be supplied to the left outlet pipe 22 and the right outlet pipe 23 through the left supply outlet 17 and the right supply outlet 18 during the operation of the braking operator.

Therefore, when a braking operation unit such as a brake pedal is operated while the vehicle is running, hydraulic fluid is supplied to the disc brakes disposed on both wheels of the front and rear wheels through the left outlet pipe 22 and the right outlet pipe 23 to brake the vehicle. Braking is performed.

On the other hand, when the rear wheel brake rotation unit 10 and the front wheel brake rotation unit 30 are rotated in the parking mode, the hydraulic fluid is not supplied to the front wheel side disk brakes (75, 76 of FIG. 2) and the rear wheel disk brake (FIG. 2). 77, 78) is supplied to only one side of the hydraulic oil. Therefore, when rotating or parking in a narrow space, the remaining three wheels are rotated while only one side of the rear wheel is braked, thereby minimizing the radius of rotation, thereby enabling stable rotation and parking.

5 is a perspective view of the rear brake wheel of the vehicle braking device according to an embodiment of the present invention in a braking state, and FIG. 6 is a braking state of the rear wheel right wheel of the vehicle braking device according to an embodiment of the present invention. Projection perspective view at.

As shown in FIG. 5, when the rotation manipulation unit rotates the rear wheel braking rotation part at an upper angle (clockwise), the vehicle may be converted into a parking mode in which only the rear wheels are braked. Although not shown, the front wheel braking rotation part is also rotated together so that the first inlet pipe (41 in FIG. 4) does not communicate with the guide groove (31 in FIG. 4) so that the hydraulic oil is not supplied to the front wheel side.

In detail, the second inlet pipe 21 communicates with the left through passage 15a through the left feed inlet 12 and the left hole 12a, and the rear wheel through the left feed outlet 17 and the left outlet pipe 22. Hydraulic fluid can only be supplied with the left disc brake. Here, the left supply outlet 17 consists of a groove extending in the circumferential direction from the end 17a of the left through passage 15a. The circumferentially extending angle of the left feed outlet 17 is formed equal to the angle of the circumferential distance between the two side feed inlets 11 and the left feed inlet 12 described above.

At this time, the right outflow pipe 23 is not in communication with the right supply outlet 18 so that the hydraulic fluid is shielded without being supplied to the rear wheel right disc brake.

Therefore, the vehicle can be stably parked by rotating the vehicle with a very small turning radius in the counterclockwise direction when only the rear wheel is braked by the rear wheel left disc brake.

On the other hand, as shown in Figure 6, when the rotation operation unit rotates the rear wheel brake rotation part by a predetermined angle lower (counterclockwise) can be converted to the parking mode in which only the rear wheel brakes. Although not shown, the front wheel braking rotation part is also rotated together so that the first inlet pipe (41 in FIG. 4) does not communicate with the guide groove (31 in FIG. 4) so that the hydraulic oil is not supplied to the front wheel side.

In detail, the second inlet pipe 21 communicates with the right through passage 15b through the right feed inlet 13 and the right hole 13a to rear wheel through the right feed outlet 18 and the right outlet pipe 23. Hydraulic fluid can only be supplied with the right disc brake. Here, the right supply outlet 18 is a groove extending in the circumferential direction from the end 18a of the right through passage 15b. The circumferentially extending angle of the right feed outlet 18 is formed equal to the angle of the circumferential distance between the two side feed inlets 11 and the right feed inlet 13 described above.

At this time, the left outflow pipe 22 is not in communication with the left supply outlet 17 so that the hydraulic fluid is shielded without being supplied to the rear wheel left disc brake.

Therefore, the vehicle can be stably parked by rotating with a very small turning radius in the clockwise direction when only the rear right wheel is braked by the rear wheel right disc brake.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

5: O-Ring 10: Rear Wheel Braking Rotator
11: Both sides supply 12: Left side supply
13: Right feed inlet 20: Rear wheel cylinder
21: second inlet pipe 22: left outlet pipe
23: right outflow pipe 30: front wheel brake rotation
40: front wheel cylinder 41: first inlet pipe
42, 43: both outlet pipes 55: rotary operation unit

Claims (5)

A front wheel side cylinder connected to the first inlet pipe so that the hydraulic oil pressurized and supplied according to the operation of the braking operator is connected, and a pair of outflow pipes connected to both side brake parts of the front wheel is connected to the other side in the circumferential direction;
A rear wheel side cylinder connected to a second inlet pipe so that the pressurized hydraulic oil flows in, and a right outflow pipe and a left outflow pipe connected to both side brake portions of the rear wheel on the other circumferential direction thereof;
A front wheel brake rotation unit interposed inside the front wheel cylinder and having a front wheel brake flow path for selectively communicating the first inflow pipe and the pair of outflow pipes as the rotation operation is performed; And
And a rear wheel brake rotating unit interposed inside the rear wheel cylinder and selectively communicating the second inflow pipe to the right outflow pipe and the left outflow pipe as the rotation operation is performed. The method of claim 1,
The rear wheel brake rotation part
On the outer circumferential side of the solid cylindrical body, both side supply inlets, the left supply inlet, and the right supply inlet, which are in selective communication with the first inlet pipe, are partitioned and formed in multiple stages.
The left supply outlet and the right supply outlet which are selectively communicated with the right outlet pipe and the left outlet pipe are formed on the other side of the outer side of the solid cylindrical body,
Inside the solid cylindrical body there is a left through passage connecting the both side supply inlet and the left side supply inlet with the left side supply outlet, and the right side through passage connecting the both side supply inlet and the right side inlet side with the right side outlet. Braking apparatus for a vehicle, characterized in that formed through. The method of claim 1,
As the rear wheel brake rotation unit and the front wheel brake rotation unit are rotated in the parking mode,
The pair of outlet pipes connected to the front wheel side cylinder is shielded, and any one of the right outlet pipe and the left outlet pipe connected to the rear wheel side cylinder communicates with a corresponding supply outlet, and the other side is shielded. Device. The method of claim 1,
And the rear wheel brake rotating unit and the front wheel braking rotating unit are connected in a line with each other. The method of claim 1,
And the rear wheel brake rotating unit and the front wheel braking rotating unit are connected to a rotating operation unit providing a rotational force according to the operation of the driver's seat.

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