KR0180369B1 - Apparatus for preventing a car from noise down - Google Patents

Abstract

It is for the purpose of improving the riding comfort by preventing the noise down by the hydraulic pressure supplied from the brake master cylinder during braking, and shortening the braking distance to improve driving stability; Lay a number of leaf springs of different lengths and fix the central part with the U axle with the lower axle, fasten the clip to both sides, and connect the bracket to the bracket fixed to the frame with a sackle pin on the front and rear eye parts. In the suspension device to which the spring assembly is applied, between the upper portion of the central portion of the leaf spring assembly and the frame is disposed by the hydraulic pressure generated in the brake master cylinder when braking is arranged to prevent the vehicle body from falling down It provides a noise down prevention device of a vehicle, characterized in that made.

Description

Vehicle noise down prevention device

1 is a state diagram used in the present invention.

2 is an enlarged cross-sectional view of the main portion of the present invention.

3 is an operating state diagram of FIG.

* Explanation of symbols for main parts of the drawings

1: Leaf spring assembly 30: Down prevention means

31 cylinder 32 slider

320, 321: passage 323: flexible hose

33: brake master cylinder 331: piston

34: fixing groove 35: stopper

37: buffer member

[Industrial use]

The present invention relates to a device for preventing noise down of a vehicle, and more particularly, to prevent noise down by hydraulic pressure supplied from a brake master cylinder during braking, to improve ride comfort, and to shorten a braking distance to improve driving stability. It relates to a noise down device of a vehicle which can be made.

[Prior art]

Suspension in automobiles is a shock absorber that connects the axle to the frame or the body to absorb vibrations or shocks from the road surface while driving, thereby improving the riding comfort and safety of the vehicle.

In such a suspension device, it is conventionally designed to simply perform a function basically required as a suspension device, and thus performs only a function as a suspension device.

Recently, in order to improve ride comfort, a shock absorber, that is, a shock absorber, which can reduce the spring constant of the spring applied to the suspension system and compensates it slightly, has been improved.

[Problem to solve]

However, when the spring constant is lowered as described above, there is a problem in that the vehicle body becomes unstable during driving, thereby improving the riding comfort, and causing anxiety to the occupants, and unstable attitude of the vehicle due to steering, which adversely affects the steering stability.

In addition, when the spring constant is low, the load of the vehicle body moves to the front side during sudden braking, so that a so-called noise down phenomenon occurs in which the front portion of the vehicle body is lowered, so that the braking distance is lengthened. There is a problem that a lot of people are damaged even in a small accident while going into the lower part of the other vehicle while going down.

Therefore, the present invention was created to solve the above problems, and an object of the present invention is to improve the riding comfort by preventing noise down by hydraulic pressure supplied from the brake master cylinder during braking, and to improve the driving stability by shortening the braking distance. It is to provide a noise reduction device for a car so that it can be made.

[Means to solve the problem]

In order to realize this, the present invention stacks a plurality of leaf springs of different lengths and fixes its central portion with the lower axle with a U bolt, fastens the clips to both sides, and fixes the frame with a sackle pin on the front and rear eye portions. In the suspension device is applied to the leaf spring assembly is connected to the old bracket, it is possible to prevent the vehicle body from being down while operating by the hydraulic pressure generated in the brake master cylinder when braking between the upper portion of the center and the frame of the leaf spring assembly Provided is a noise down prevention apparatus for a vehicle, characterized in that the vehicle body down prevention means is disposed.

The vehicle body down preventing means includes a slider which is slidably arranged up and down on a cylinder formed in a frame in a form in which a lower side thereof is opened; A stopper which protrudes outward by the hydraulic pressure supplied from the brake master cylinder through the inside of the slider and is inserted into fixing grooves formed at equal intervals on both side walls of the cylinder to limit the slider vertical movement; A piston disposed below the slider; It provides a noise down device of a vehicle comprising a vertical cushioning member interposed between the piston and the upper surface of the leaf spring assembly.

Wherein the slider is provided with a horizontal passage and a vertical passage opening to the upper side of the center portion of the horizontal passage is provided on both sides of the horizontal passage is arranged a stopper to be coupled to the left and right slides in its horizontal passage, the stopper of the stopper is tensioned inside It provides a noise down prevention device for a vehicle, characterized in that the spring is formed so that the elastic force can be exerted inward unless the hydraulic pressure is applied to the stopper.

[Action]

According to the above configuration, if a sudden braking is applied during driving of the vehicle, the stopper disposed in the horizontal passage of the slider is protruded by the hydraulic pressure of the brake master cylinder cylinder to be inserted into the fixing groove to limit the lifting movement of the slider.

Then, the operation of the plate spring assembly is prevented from being deformed by the sudden load by the piston and the buffer member, thereby preventing the vehicle body from lowering, thereby preventing any problems due to the lowering of the vehicle body during sudden braking.

When the brake pedal is released after the rapid braking, the stopper inserted into the fixing groove comes out of the fixing groove to perform a normal suspension function.

EXAMPLE

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

1 is a state diagram showing the application of the present invention, shown as an example applied to the suspension using the leaf spring.

The leaf spring assembly 1 stacks a plurality of leaf springs 10 of different lengths and fixes the central portion thereof with the U bolt 11 together with the lower axle 12 and the clips 13 and 14 on both sides thereof. It is formed by fastening.

In addition, the front and rear ends of the leaf spring assembly 1 are connected to the brackets 20 (21) fixed to the frame 19 with the pins 17 and 18 on the front and rear ends 15 and 16, respectively.

In this suspension device, the present invention has arranged a vehicle body down preventing means 30 which can prevent the vehicle body from being down during rapid braking between the upper portion of the central portion of the leaf spring assembly 1 and the frame 19.

The vehicle body down preventing means 30 includes a slider 32 which is slidably arranged up and down on a cylinder 31 formed in the frame 19 in a form in which the lower side is opened, as shown in FIGS. 1 and 2; The slider 32 is protruded to the outside by the hydraulic pressure supplied from the brake master cylinder 33 through the inside of the slider 32 and inserted into the fixing grooves 34 formed at equal intervals up and down on both side walls of the cylinder 31. Stopper 35 to limit the vertical movement; A piston (36) disposed below the slider (32); It includes a vertical damping member 37 interposed between the piston 36 and the upper surface of the leaf spring assembly (1).

In the slider 32, the compression spring 324 is pushed upward and is always subjected to an elastic force directed downward, and the horizontal passage 320 and the vertical passage 321 opened to the upper side of the central portion of the horizontal passage 320. A stopper 35 is provided on both sides of the horizontal passageway 320 so that the left and right slides are coupled to the horizontal passageway 320, and the stopper 35 of the stopper 35 is held therein. As long as no hydraulic pressure is applied to the stopper 35, the stopper 35 is pulled inward.

And the flexible hose 323 that can be stretched is connected to the upper side of the vertical passage 321, the upper end thereof is connected to the conduit 330 of the brake master cylinder 33, the piston 331 to the upper side thereof It is built and supported by a tension spring 332 that exerts an elastic force upward.

The upper side of the vertical passage 321 is connected to the flexible hose 323 to allow the slider 32 to move up and down, and the tension spring holding the stopper 35 and the piston 331. The elastic force of the 350 and 332 may be set so that the operation may be performed only when the instantaneous brake operation is performed without the normal brake operation.

Accordingly, when the hydraulic pressure is supplied from the brake master cylinder 33, the hydraulic pressure pushes the piston 331 to apply pressure to the fluid filled in the flexible hose 323 and the vertical passage 321 and 320. By being applied, the stopper 35 is pushed outward and is inserted into the adjacent fixing groove 34 formed in the cylinder 31 as shown in FIG. 3, thereby limiting the vertical movement of the slider 32.

When the brake pedal is stepped on the contrary, the hydraulic pressure generated in the brake master cylinder 33 is dissipated. As a result, the piston 331 is moved to its original position by the elastic force of the tension spring 332, and thus the passage 321 is removed. The hydraulic pressure applied to the 320 is released and the stopper 35 inserted into the fixing groove 34 retreats by being pushed out by the hydraulic pressure so as not to interfere with the vertical movement of the slider 32.

And the stopper 35 is inserted into the fixing groove 34 is the diameter of the stopper 35 to be slightly larger than the outer diameter of the stopper 35 is made smoothly coming in and out, these top and bottom spacing of the suspension of the applied vehicle It takes into consideration the design conditions of the device and decides according to the down range of the car body during sudden braking.

In addition, the piston 36 disposed below the slider 32 has an upper side inserted into the cylinder 31 and a lower end thereof on a straight line of the shock absorbing member 37 disposed above the spring assembly 1. It is disposed in the cylinder 31 in accordance with the lifting and lowering of the shock absorbing member 37 which is raised and lowered by the deformation of the spring assembly 1 by the down of the vehicle body or the rise of the wheel.

When the body down prevention means 30 applies sudden braking while the vehicle is running, the stopper 35 disposed on the horizontal passage 321 of the slider 32 is fixed while being protruded by the hydraulic pressure of the cylinder of the brake master cylinder 33. Is inserted into the groove 34 to limit the lifting movement of the slider (32).

Then, the operation of the plate spring assembly 1 is prevented from being deformed by the sudden load by the piston 36 and the shock absorbing member 37, thereby preventing the vehicle body from descending, thereby causing various problems due to the lowering of the vehicle body during sudden braking. Can be prevented in advance.

When the brake pedal is released after the rapid braking, the stopper 35 inserted into the fixing groove 34 exits from the fixing groove 34 to perform a normal suspension function.

[effect]

As described above, according to the present invention, by preventing the noise down phenomenon in which the vehicle body is pulled forward by the hydraulic pressure of the brake master cylinder during braking, the riding comfort can be improved and the braking distance can be reduced.

Claims (4)

Lay a number of leaf springs of different lengths and fix the central part with the U axle with the lower axle, fasten the clip to both sides, and connect the bracket to the bracket fixed to the frame with a sackle pin on the front and rear eye parts. In the suspension device to which the spring assembly is applied, between the upper portion of the central portion of the leaf spring assembly and the frame is disposed by the hydraulic pressure generated in the brake master cylinder when braking is arranged to prevent the vehicle body from falling down Noise down device of the vehicle, characterized in that made by. [Claim 2] The vehicle body down prevention means of claim 1, further comprising: a slider arranged to be slidable up and down on a cylinder formed in a frame in a form in which a lower side thereof is opened; A stopper which protrudes outward by the hydraulic pressure supplied from the brake master cylinder through the inside of the slider and is inserted into fixing grooves formed at equal intervals on both side walls of the cylinder to limit the slider vertical movement; A piston disposed below the slider; And an upper and lower buffer members interposed between the piston and the upper surface of the leaf spring assembly. According to claim 2, The slider is provided with a horizontal passage and a vertical passage opening to the upper side of the center portion of the horizontal passage is provided on both sides of the horizontal passage is provided with a stopper which is coupled to the left and right slide in the horizontal passage thereof, the stopper thereof The inner side of the tension spring is supported by the stop of the noise reduction device of the vehicle, characterized in that it is formed so as to exert an elastic force on the inside unless the hydraulic pressure is applied to the stopper. [4] The apparatus of claim 3, wherein the upper side of the vertical passage is connected to a flexible two-way hose that is flexible.