KR200150435Y1 - Suspension strut for a vehicle - Google Patents

Abstract

The present invention relates to a suspension strut of a vehicle, and in the related art, after a bracket of a vehicle body and a suspension strut is fastened by bolts, a gap is generated in a contact portion between the vehicle body and the bracket, so that external noise or foreign matter, or the like flows in the vehicle body. There was a problem in that the tightening force of the bolt fastening the bracket and weakened.

Therefore, the present invention forms the groove portion 211 in the bracket 210 of the suspension strut 200 and forms the fastening hole 212 on the inner surface thereof, the hole 310 is formed in the center and the small hole 320 at the periphery. The formed circular insulator 300 is installed between the vehicle body 100 and the bracket 210 of the suspension strut 200, and thus, a minute gap generated in the contact portion between the vehicle body 100 and the bracket 210. It is possible to prevent foreign substances, such as noise and dust from being introduced by blocking the, further improves the fastening force of the bolt 400 is fastening the bracket 210 of the vehicle body 100 and the suspension strut 200. It is a useful design to make.

Description

Suspension strut of car

1 is a sectional view showing the main parts of a conventional structure;

Figure 2 is a sectional view of the main portion showing an embodiment according to the present invention.

Figure 3 is a perspective view of the insulator of the present invention.

Figure 4 is an enlarged cross-sectional view of the main portion illustrating a fastening state of the present invention.

* Explanation of symbols for the main parts of the drawings

100: body 110: insertion hole

200: suspension strut 210: bracket

211 groove 212 fastening hole

300: insulator 310: hole

320: small pores

[Detailed description of the proposal]

[Purpose of design]

The present invention relates to a suspension strut which is a device that supports a coil spring and a shock absorber to a vehicle body and cushions it when a shock or vibration occurs in a wheel. More specifically, the strut is provided by installing an insulator at a fastening portion between the strut and the vehicle body. The gap between the vehicle body and the body can effectively prevent outside noise, dust and other foreign substances from entering the vehicle, and the suspension strut of the car can further improve the tightening force of the bolts connecting the bracket of the vehicle body and the suspension strut. It is to provide.

[Technical field to which the draft belongs and its prior art]

Generally, a shock absorber of a vehicle includes a suspension spring and a shock absorber, and the suspension spring includes a leaf spring, a coil spring, a torsion bar, an air spring, and the like. These suspension springs support the vehicle body and provide vibration and shock loads from the road surface. The shock absorber absorbs the up and down vibration energy of the car body, thereby suppressing the vibration of the car and improving the riding comfort, protecting the load, and increasing the lifespan by reducing the dynamic stress of each part of the car body. At the same time, the movement of the spring up and down is suppressed to secure the tire folding property, and the attitude change caused by the inertia force is suppressed to improve the motor performance. The vibration force is generally referred to as damping force.

The damping force generating mechanism includes a method of using solid friction and a method of using fluid pressure. A shock absorber used as a suspension of a vehicle is light and small, and can obtain relatively large absorbed energy and has a damping force characteristic for an operating speed. In such a case, the mechanism utilizing the flow viscosity resistance of the fluid is exclusively used.

The shock absorber structure that functions as this is the simplicity of the damping force generating structure, the oil damper of the cylindrical structure with oil built in as the working fluid at the low price, and the strength of the cylindrical shock absorber and the car that simply generates the damping force. It is divided into suspension struts (also called suspension supports or strut mounts or upper supports) which serve as members.

In other words, the tubular shock absorber has a twin-tube corrosion absorber and a monotube, a monotube gas sealed with a high-pressure gas absorber, and a twin tube gas absorber, among which the twin tube gas absorber has a wide operating range. The damping force characteristics in the vehicle are stabilized, and the overall sound pressure level, basic length, price, etc. when friction and oil pass through the valve are comprehensive, and the shock absorber of this structure is almost used in recent passenger cars. It is coming true.

In the cylindrical shock absorber, each of the advantages and disadvantages of the twin-tube shock absorber is a valve for generating a damping force in the expansion stroke to the piston portion, a valve for generating a damping force in the contraction stroke to the base portion, the damping force generating mechanism Is independent in new construction. The reservoir chamber is an oil compensation chamber for the entry and exit of the rod and contains atmospheric air.

Therefore, the damping force generating valve is independent of the expansion and contraction, so it is easy to tune the characteristics, and the structure is simple and inexpensive, while the damping force characteristic of the shrinking side tends to become unstable in the high-speed operating region, and oil passes through the valve. There is a disadvantage in that the classification sound is easily increased.

In addition, the monotube gas shock absorber has a reservoir chamber installed at the lower end of the shock absorber, and is filled with nitrogen gas at a high pressure (2 to 3 MPa) so that the damping force on the contraction side can be sufficiently generated. The oil is completely separated. The damping force is generated in all the expansion and contraction valves of the piston.

Therefore, since it is sealed with high pressure gas completely separated from oil, stable damping force characteristics can be obtained, and there is an advantage that it is difficult to generate a classification sound of oil, while the length of installation in the car is long because the reservoir chamber is at the bottom end of the shock-up server. Since the high pressure gas pressure and dynamic pressure directly operate in the chamber, the friction is high, and the structure is simple, but the cost is high because many parts require high precision.

In addition, the twin-tube gas shock absorber eliminates the cavitation generated during continuous operation or high speed operation, and at the same time improves the shortcomings of the monotube shock absorber.The damping force generating mechanism is a valve of the piston part that generates damping force in both expansion and contraction strokes. It consists of a mechanism and a base valve mechanism that generates a damping force in the contraction stroke. Like the twin-tub type shock absorber, the reservoir chamber is an oil compensation chamber for entering and exiting rods, and is filled with nitrogen gas at a relatively low pressure (0.5 to 1 MPa). .

Therefore, it is possible to obtain stable damping force in continuous operation or high speed operation, and it is difficult to generate oil classification sound, while the damping force of the shrink stroke is a combination of the valve and base valve characteristics of the piston part, so it is necessary to pay attention to tuning. There is a disadvantage.

In addition, the suspension strut uses a cylindrical shock absorber as a link member which is one of the suspensions. The suspension strut also functions as a shock absorber and also functions as a shock absorber. In the case of the front suspension, it also serves as a kingpin. In addition, the cylindrical shock absorber can be classified into three types of damping force generating mechanisms: twin tube type shock absorber, mono tube type gas shock absorber, and twin tube type gas shock absorber. Twin-tube gases can be classified as struts. Among these, monotube gas struts are expensive because of their complex structure, and they are used for special purposes such as lily, and they are used in only a few parts of general vehicles, and the most commonly used struts are twin tube struts struted with twin tube shock absorbers. Suspension struts are the mainstream.

On the other hand, Figure 1 is a side cross-sectional view of the main portion showing the upper end portion of the conventional suspension strut, when looking at the configuration of the vehicle body 10 is located at the upper end of the first bracket 20, the second bracket 30, the third The bracket 40 is configured, and a rubber 50 as a shock absorbing member is installed between the first bracket 20 and the second bracket 30, and the spring 42 and the damper (3) are installed on the third bracket 40. 44 is installed, and the third bracket 40 and the second bracket 30 are fastened by the rod 46 of the damper 44.

In addition, the first bracket 20 is fastened to the welding nut 11 installed on the rear surface of the vehicle body 10 by bolts 60, wherein the materials of the vehicle body 10 and the first bracket 20 are fastened. Since the steel and the steel are in contact with each other, a fine gap is generated without forming a complete contact surface, and the fastening force of the bolt 60 which fastens the vehicle body 10 and the first bracket 20 is further reduced. As it decreases over time, the gap is larger and foreign matters such as noise and dust are easily introduced.

[Technical Challenges to be Done]

Therefore, an object of the present invention is to solve the above problems, by installing an insulator at the part where the suspension strut and the vehicle body are fastened, a gap is generated at the connection part of the suspension strut and the vehicle body, and external noise and foreign matters are introduced. It is to provide a suspension strut of an automobile that can prevent the reduction and the tightening force of the bolts that fasten the suspension strut and the vehicle body.

The purpose of the present invention is to fasten the bracket and the vehicle body of the suspension suspension, form a hole in the car body and then form a fastening hole in the inner surface, a hole is formed in the center and a small hole is formed in the circumference It is achieved by constructing an insulator of the suspension strut between the bracket of the suspension strut and the vehicle body.

The present invention inserts the hole formed in the center of the insulator into the bracket of the suspension strut, inserts a bolt into the coupling hole formed in the forming part of the bracket, and fastens the nut to the nut of the vehicle body, thereby insulating the insulator from the suspension strut and the body. It is possible to prevent the external noise or foreign matters from being introduced while being inserted between them, and as the insulator that is pressed between the suspension strut and the vehicle body expands, the bolt is pushed downwards to continuously tighten the bolting force. Since it can hold | maintain in this, the said objective can be achieved.

[Composition and Action of Design]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, which are attached to the technical configuration and the effect of the present invention.

That is, Figure 2 is a side cross-sectional view showing the main part installed state of the present invention, Figure 3 is a perspective view illustrating an insulator according to the present invention, Figure 4 is an enlarged cross-sectional view showing a main portion illustrating the fastening state of the present invention, As described above, the present invention coincides the fastening hole 212 formed in the bracket 110 of the suspension strut 200 with the insertion hole 110 of the vehicle body 100 to fix the suspension strut 200 to the vehicle body 100. To be fastened as a bolt 400, and an upward groove 211 is formed in the bracket 210 of the suspension strut 200, and then a fastening hole 212 is formed at an inner surface thereof, and a hole 310 is formed at the center thereof. It is formed to form a circular insulator 300 formed with a plurality of small holes 320 to match the fastening hole 212 formed in the insertion hole 110 and the bracket 210 of the suspension strut 200 of the vehicle body at the periphery It is characterized by the feature. In the figure, reference numeral 120 denotes a weld nut welded to the rear surface of the vehicle body 100, and reference numeral 213 denotes a bent portion formed in the center portion of the bracket of the suspension strut 200.

According to the present invention formed as described above, in the fastening of the suspension strut to the vehicle body, the insulator 300 is mounted between the vehicle body 100 and the suspension strut 200 to which the vehicle body 100 and the suspension strut 200 are fastened. After that, it is to prevent foreign substances such as noise or dust from flowing through the gap of the contact portion.

That is, the hole 310 of the insulator 300 is inserted into and installed in the bent portion 213 located at the center of the bracket 210 of the suspension strut 200, and then the small holes 320 formed on the periphery of the insulator 300 are formed. ) Are matched with the fastening hole 212 formed in the insertion hole 110 of the vehicle body 100 and the bracket 210 of the suspension strut 200, and then the bolt 400 of the bracket 210 As the fastening hole 212 and the small hole 320 of the insulator 300 and the insertion hole 110 of the vehicle body 100 pass through the fastening hole 212 and the welding nut 120 installed on the rear surface of the vehicle body 100, the vehicle body The gap generated between the 100 and the suspension strut 200 is blocked by the insulator 300.

And after the insulator 300 is installed on the bracket 210 of the suspension strut 200, as shown in Figure 4, the body 100 is raised from the upper surface while pressing the insulator 300 is compressed accordingly As the insulator 300 was expanded, the peripheral edge of the fastening hole 212 of the groove 210 of the bracket 210 pushed the bolt 400 downward, thereby preventing the fastening force of the bolt 400 from being reduced. will be.

In addition, even if the bolt 400 is finely loosened and the gap between the bracket 210 of the suspension strut 200 and the vehicle body 100 is widened, the insulator 300 that has been compressed increases and the vehicle body 100 and the suspension strut 200 are extended. Since it can be continuously blocked between the brackets 210 of the outside noise and foreign matter will be effectively prevented from flowing.

[Effect of design]

As described above, according to the present invention, when the suspension strut is fastened to the vehicle body, a rubber insulator is installed between the vehicle body and the suspension strut to completely block the minute gap generated in the contact portion between the vehicle body and the suspension strut bracket. This is to prevent foreign substances such as noise and dust from coming in from outside, and it is useful to prevent the bolts from loosening by improving the tightening force of the bolts that fasten the bracket of the vehicle body and the suspension strut. It is devised.

Claims (1)

In order to fix the suspension strut 200 to the vehicle body 100, the insertion hole 110 of the vehicle body 100 and the fastening hole 212 formed in the bracket 210 of the suspension strut 200 coincide with each other as a bolt 400. To fasten, but the bracket 210 of the suspension strut 200 to form an upward groove 211, the fastening hole 212 is formed on the inner surface, a hole 310 is formed in the center and the bracket 210 at the periphery Insulator 300 is formed between the fastening hole 212 and the insertion hole 110 of the vehicle body 100 is formed between the vehicle body 100 and the suspension strut 200 Suspension strut of car characterized in that it became.