KR20000003685U - Parking brake system for vehicle with release prevention function - Google Patents

Abstract

The present invention relates to a vehicle parking brake device having an anti-loosening function, which separates the ratchet bar and the grip of the parking lever and dualizes them so that the engagement between the ratchet bar and the pole due to malfunction is not released, thereby improving safety when parking. The purpose is to make it possible.

The present invention for achieving the above object, the inner diameter is changed to the through portion (11) in which the parking lever (1) which transmits the driver's operating force during parking to the brake system of the rear wheel through the parking brake cable (2). A grip 6 having a serrated portion 16 on one side with a reduced end 12 and a stopper 13 fitted on the other side of the penetrating portion 11 and a grip 6; The end of the ratchet bar 7 consists of a ratchet bar 7 having a projection 14 corresponding to the end 12 of 6) at one end and having a serration 17 on one side of the member. Compression spring 15 is connected between the inner surface of the stopper (13) and (12).

Description

Parking brake system for vehicle with release prevention function

The present invention relates to a parking brake device of a vehicle, and in particular, to prevent the artificial release of the parking lever that fixes the parking brake cable in a pulled state during parking, thereby preventing the occurrence of a safety accident due to sudden parking termination. The present invention relates to a parking brake device for a vehicle having an anti-loosening function capable of maintaining a stable parking state.

In general, a brake device of a vehicle is a device used to maintain a parking state in addition to decelerating or stopping a driving vehicle. In general, the brake device converts the kinetic energy of the vehicle into thermal energy and releases it into the atmosphere by using a friction force to perform a braking action. Friction brakes are used.

The brake device includes a main brake mainly used when driving and a parking brake used for parking a car, wherein the parking brake typically includes a parking lever, a parking brake cable, a parking brake drum, a shoe, a spring, and the like. It is designed to brake the rear wheels by the frictional force generated by the parking brake shoe close to the parking brake drum by operating the parking lever during parking.

That is, the conventional parking brake device of the conventional commercial vehicle, as shown in Figure 1, the parking lever 1 is installed in the cab so that the driver can operate when parking, and the rear wheel of the vehicle from the parking lever 1 Parking brake cable (2) long and extended to reach the cam brake (3), which is connected to one end of the parking brake cable (2) and installed to apply an expansion force to the brake shoe (4) of the rear wheel during parking braking, the brake shoe It is made of a parking brake drum (5) which is arranged to surround the outside of the (4) is mounted to the tip of the propulsion shaft (not shown).

Accordingly, when the driver pulls the parking lever 1 installed in the cab upward, the parking brake cable 2 is pulled in conjunction with the parking lever 1, and thus the cam lever connected to the brake shoe 4 of the rear wheel ( 3) is rotated to expand the brake shoe 4, the inner surface of the parking brake drum 5 is in close contact with the brake shoe 4, the braking is made according to the expansion of the brake shoe (4).

Meanwhile, as shown in FIG. 2, the parking lever 1 provided in the cab has a grip 6 corresponding to a handle gripped by the driver during the parking operation, and is integrally connected to the grip 6. It consists of a ratchet bar (7) having a ratchet (Ratchet) formed in a continuous form over the entire length along the longitudinal direction on one side of the member, the upper portion of the ratchet bar (7) to a fixed bracket (8) installed in the vehicle body Supported by

And the fixing bracket (8) for supporting the upper portion of the ratchet bar (7), as shown in Figure 3, having a pole (Pawl; 9) to be engaged with the ratchet while being formed in a form surrounding the ratchet bar (7) The pawl 9 is fixed to the fixing bracket 8 via the pin member 10 penetrating the fixing bracket 8.

Therefore, when the driver pulls the grip 6 integrally connected to the ratchet bar 7 upward when parking, the pawl 9 provided in the fixing bracket 8 is engaged with the ratchet of the ratchet bar 7. And the ratchet bar 7 is fixed, so that the parking brake cable 2 is pulled to generate a parking braking force. When the parking is stopped, the ratchet bar 7 is interlocked by only slightly rotating the grip 6. Since the parking brake cable 2, which has been pulled out by being engaged between the ratchet and the pawl 9 of the ratchet bar 7 by being rotated, is released, the ratchet bar 7 is lowered to release the parking braking force.

However, in the conventional parking brake apparatus as described above, when the ratchet bar 7 which is pulled upward during parking and the ratchet is engaged with the pawl 9 and is fixed, accidentally touches the grip 6 by the driver or other occupant, As the grip 6 is rotated, there is a disadvantage that the parking state is released while the engagement between the ratchet and the pawl 9 of the ratchet bar 7 is released, thereby causing a dangerous situation.

The present invention has been devised to solve the above disadvantages, by separating the ratchet bar and the grip of the parking lever to dualize so that the engagement between the ratchet bar and the pole due to malfunction is not released, thereby improving safety when parking. It is an object of the present invention to provide a parking brake device for a vehicle having an anti-loosening function.

1 is a schematic view showing a conventional parking brake device;

2 is a state diagram showing the parking lever shown in FIG.

3 is a cross-sectional view taken along the line A-A of FIG.

Figure 4 is a state of the parking lever with an anti-loosening function according to the present invention,

(A), (b) is sectional drawing of the B-B line and C-C line of FIG. 4, respectively.

<Description of Symbols for Main Parts of Drawings>

1-parking lever 2-parking brake cable

3-Cam Lever 4-Brake Shoe

5-parking brake drum 6-grip

7-ratchet bar 8-fixing bracket

9-pole 10-pin member

11-through 12-end

13-Spigot 14-Protrusion

15 compression springs 16,17 serrations

The present invention for achieving the object of the above bar, in the parking brake device of the vehicle having a parking lever consisting of a grip handle and a ratchet bar connected to the driver when parking, the parking lever is opened through the opening portion One side of the member, having a end with a reduced inner diameter and having a serration on one side and a stopper fitted to the other side of the penetrating portion, and a protrusion corresponding to the end of the grip on one end. It consists of a ratchet bar having an erection portion, characterized in that the compression spring is provided between the end of the ratchet bar and the inner surface of the stopper.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a state diagram of a parking lever with a release prevention function according to the present invention, Figure 5 (a), (b) is a cross-sectional view of the BB line and CC line of Figure 4, respectively, showing the configuration of a conventional parking brake device 1 and 3, the same reference numerals will be given with the same reference numerals, and detailed description thereof will be omitted.

According to the present invention, as shown in the figure, the parking lever 1 that is directly received by the driver's operating force when parking in the parking brake device and transmitted to the rear wheel brake system through the parking brake cable 2 is the driver during the parking operation. The grip 6 corresponding to the handle to be gripped with the grip 6 is movable along the longitudinal direction from the grip 6 so that the entire length of the parking lever 1 can be adjusted in a masked manner, and is connected to the entire length of the member. It consists of a ratchet bar 7 with a ratchet in a continuous form over.

And the upper portion of the ratchet bar (7) is supported by a fixing bracket (8) having a pawl (9) engaged with the ratchet therein while being installed in the vehicle body as in the prior art.

Here, the grip 6 is formed in the form of a penetrating inside, and one end portion of the penetrating portion 11 is provided with an end portion 12 having a stepped shape having a reduced inner diameter, and the other side of the penetrating portion 11. The stopper 13 is adapted to fit in a fitting manner.

One end of the ratchet bar 7 is provided with a protrusion 14 having a diameter of a diameter so as to correspond to the end 12 of the grip 6, between the protrusion 14 and the stopper 13. The compression spring 15 is connected.

In addition, one side of the inner circumferential surface of the penetrating portion 11 of the grip 6 is processed with a serration 16 having a spline shape of a yaw type, and one side of the ratchet bar 7 corresponds to the iron. The serrated portion 17 of the (i) type spline shape is processed, so that the grip 6 and the ratchet bar 7 can be joined by a so-called slip joint.

Accordingly, the grip 6 and the ratchet bar 7 are movable in the axial direction so that the length of the overall length can be changed, and the grip 6 is moved when the grip 6 moves toward the ratchet bar 7. The ration 16 and the serration 17 of the ratchet bar 7 are engaged so that the operating force applied to the grip 6 can be transmitted to the ratchet bar 7.

And the compression spring (15) installed between the stopper 13 and the end of the ratchet bar (7) fixedly fitted to the through portion (11) of the grip (6), the grip (6) toward the ratchet bar (7) It is designed to give restoring force when moving and returning to the original position.

Therefore, when the parking brake device is provided with the parking lever 1 having a structure in which the grip 6 and the ratchet bar 7 can be selectively splined in the parking brake device as described above, when the driver parks the grip 6 Is pulled upward, the ratchet together with the grip 6 is brought into contact between the end portion 12 formed in the penetrating portion 11 of the grip 6 and the protrusion 14 formed at one end of the ratchet bar 7. The bar 7 also moves upwards and the parking brake cable 2 is pulled to generate a parking braking force on the rear wheels.

On the other hand, when parking, the grip 6 is pushed toward the ratchet bar 7 so that the serration part 16 of the grip 6 and the serration part 17 of the ratchet bar 7 are engaged with each other. Next, when the grip 6 is rotated to transmit its operating force to the ratchet bar 7, the ratchet bar 7 descends while the ratchet of the ratchet bar 7 is released from the pawl 9 of the fixing bracket 8. Due to the parking brake cable (2) was pulled by the parking braking force is released.

In this way, if it is possible to artificially prevent the rotation of the grip 6 due to the misoperation of the brake device during parking braking to the ratchet bar 7, the parking state is suddenly released to eliminate dangerous accidents that may be caused. You can do it.

As described above, according to the present invention, by adding an anti-locking function to the parking brake device to prevent the parking braking force acting on the rear wheel after parking of the car by the misoperation of the parking lever, the driver's concern can be reduced. As a result, the merchandise of the vehicle may be improved.

Claims (1)

Serration at one side with the end portion 12 whose inner diameter is reduced to the through part 11 where the parking lever 1 which transmits the driver's operating force to the brake system of the rear wheel through the parking brake cable 2 is opened. A grip 6 having a portion 16 and a stopper 13 fitted in the other side of the penetrating portion 11, and a protrusion 14 corresponding to the end portion 12 of the grip 6. Compressed between the end portion 12 of the ratchet bar 7 and the inner surface of the stopper 13, having a ratchet bar 7 having a serration portion 17 on one side of the member while having one end thereof). Parking brake device for a vehicle having a release prevention function made by connecting the spring (15).