KR940003996Y1 - Shock absorber for a vehicle - Google Patents

Abstract

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Description

Car shock absorber

1 is a schematic view showing an installation state of the present invention.

2 is a perspective view of a hydraulic cylinder installed between the axle and the body.

3 is a cross-sectional view showing an installation state of a hydraulic cylinder installed between the axle and the body.

4 is a perspective view of a hydraulic cylinder installed in the control box.

5 is a cross-sectional view showing the installation state of the hydraulic cylinder installed in the control box.

6 is a cross-sectional view of the hydraulic control device installed in the control box.

7 is a plan view schematically showing the installation state of the present invention.

* Explanation of symbols for main parts of the drawings

1 cylinder 2 free piston

10: hydraulic cylinder 20: control box

20a: inner wall 21: cylinder

22: free piston 23: cylindrical body

23a: support frame 30: hydraulic cylinder

31: retaining ring 32: angle

33: coil spring 40: hydraulic control device

41-44 pipe 45-57 elbow

58-61: Hydraulic cylinder 62,63: Free piston

64: Between operation 80-83: Differential pressure operation valve

84: oil pump A, A ': axle

C: body α: space

The present invention relates to a shock absorber of a vehicle suitable for absorbing and mitigating vibrations or shocks received from the ground and the road surface when the vehicle is driven, and preventing the vehicle body from tilting.

In particular, the present invention installs a hydraulic cylinder having a free piston between the axle and the body of the wheel, and connects the hydraulic hose to the hydraulic cylinder and the hydraulic control device in the control box installed at the rear of the vehicle body by each of these hydraulic cylinders. Accordingly, the present invention relates to a shock absorber for a vehicle that protects the vehicle body and provides excellent ride comfort by absorbing or dispersing vibrations and shocks received from the road surface.

Generally, a shock absorber of a vehicle is a device that is installed between the axle and the body to prevent the axle from transmitting the vibrations and shocks received from the road surface directly to the body, thereby preventing damage to the body and the load, and improving ride comfort. Such devices include Chassis Spring, which mitigates the impact from the road surface, and a shock absorber, which restrains free vibration of the Chassis Spring, and a stabilizer that prevents the vehicle from shaking sideways. Stabilizer).

The chassis sheath spring is installed between the vehicle body and the wheel so as to absorb the shock and vibration received from the road surface when the vehicle is driving so that it is not transmitted to the vehicle body, which includes a metal leaf spring and a coil spring. spring) and torsion bar spring, and non-metallic materials include rubber spring and air spring.

And the shock absorber is to improve the riding comfort by absorbing the natural vibration generated by the shock received by the spring when the car is running, so as to improve the riding comfort, and here is an operation method of converting up and down kinetic energy into heat Accordingly, there are solid friction type and hydraulic type, and hydraulic type is generally used rather than solid friction type.

In addition, the stabilizer couples both ends of the torsion bar with a large spring constant to the lower suspension arm, and supports the center portion to the frame so that the left and right wheels twist when the left and right wheels move in opposite directions. This spring force reduces the inclination of the body and keeps the body in balance.

However, since the chassis spring is composed of multiple leaf springs, it is difficult to absorb minute vibrations due to inter leaf friction, and when the spring is too flexible, the support force of the axle is insufficient, resulting in instability. Since the bending amount of the spring varies depending on the load, the longevity of the plate must be changed.

In addition, the shock absorber is difficult to manufacture due to the complicated structure of the orifice, the valve mechanism and the cylinder, and occupies a lot of installation space.

In addition, the stabilizer itself is inclined much by the centrifugal force acting when the vehicle turns when using a spring having a small spring constant.

In addition, the conventional shock absorbers as described above have a short lifespan and severe noise generated by the shock absorber itself, because mechanical friction and wear are severely generated while the vehicle is driving, and it is difficult to absorb minute vibrations and shocks.

In order to solve this problem, the present applicant has filed an application for "shock absorber of automobile" (Utility Model Registration Application No. 91-5231).

Its contents are to install a hydraulic cylinder having a free piston between the axle and the body of the vehicle together with the coil spring, and to connect the hydraulic cylinder and the control box installed in the center of the body with a hydraulic hose, the impact applied to the axle and the body The coil spring was absorbed first and the free pistons were operated secondly to disperse oil in other cylinders, so that even minute vibrations and shocks could be absorbed and alleviated. However, when actually using the above-described "car shock absorber", the following several problems were found.

That is, in the above-mentioned "car shock absorber", the coil spring and the hydraulic cylinder are installed inside each wheel, so it is unsuitable to install in small vehicles with small installation space, and the relatively heavy control box is installed in the center of the vehicle body. This made it difficult to maintain the overall balance of its installation and bodywork.

In addition, since the impact from the road surface is first absorbed by the coil spring and then applied to the hydraulic cylinder secondly, it is difficult to absorb minute shocks and vibrations. In addition, the coil spring is exposed to the outside and frequently damaged and damaged, and the control box There was a problem that the oil distribution effect in the fall.

An object of the present invention is to install a hydraulic cylinder having a free piston between the axle and the body of the wheel to solve the above problems, and the control box equipped with a hydraulic cylinder and a hydraulic control device equipped with a coil spring to the car It is installed on the rear trunk side by connecting it to the hydraulic cylinder and the hydraulic hose, so that the balance of the vehicle body and the shock absorbing effect is excellent.

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

1 is a schematic view showing the installation state of the present invention, the present invention is largely installed inside each wheel 101-103 of the vehicle and moves according to the shock and vibration applied to the vehicle body C and the vehicle body ( C) The hydraulic cylinder installed in the control box 20 and the coil spring 33 installed in the control box 20 connected to the hydraulic cylinder 10 and the hydraulic hoses 104-107 are installed on the rear trunk side of the trunk. It consists of 30 and the hydraulic control device (40).

Each of the hydraulic cylinders 10 installed inside the wheels 100-103 has the same structure, and as shown in FIGS. 2 to 3, each of the hydraulic cylinders 10 includes a cylinder 1. The upper end of the cylinder (1) and the elbow (3) and the pipe (4) elbow (5) pipe (6) is connected to the upper end in order to connect the hydraulic hose (104-107) to the double end pipe (6) do.

And the lower end of the free piston (2) inserted into the cylinder (1) is fixed to the axles (A, A ') inside the wheel (100-103), the support plate (3a) is integrally on the upper end of the elbow (3) It is formed and fixed to the vehicle body (C).

In addition, an air outlet 1a is formed at the lower end side of the cylinder 1 so that air between the piston ring 7 and the packing 8 is sucked and discharged when the free piston 2 is raised or lowered. An air outlet 4a is formed around the pipe 4 between the elbows 3 and 5 to open and close by the bolt 9 so that the air is smoothly discharged during oil supply and replenishment.

Each of the hydraulic cylinders 30 installed in the control box 20 has the same structure, and as shown in FIGS. 4 to 5, each of the hydraulic cylinders 30 is a cylinder 21. It is formed in a reversible "T" shape and both ends thereof are connected to the hydraulic cylinder 10 and the hydraulic control device 40 and the hydraulic hoses 104-111 described later, respectively, the lower end of the cylinder 21 Is fixed to the inner wall 20a at the bottom of the control box 20.

In addition, a cylindrical body 23 having an open bottom is attached to an upper end of the free piston 22 protruding upward from the cylinder 21 to surround the free piston 22 and the upper portion of the cylinder 21, and the cylindrical body 23. At the top of the support 23a at the bottom, the coil spring 33 is coalesced.

In addition, a washer-shaped fixing ring 31 is attached to an upper end of the coil spring 33, and the fixing ring 31 is an “T” shaped angle fixed to an inner wall 20a of the upper end of the control box 20. 32) It is fixed to the lower end, and sufficient space α is maintained between the upper end of the cylindrical body 23 and the upper inner wall 2a so as not to hit when the cylindrical body 23 rises. In addition, an air outlet 21a is formed at the upper end side of the cylinder 21 to allow the air between the piston ring 24 and the packing 25 to be sucked and discharged when the free piston 22 is raised or lowered.

Hydraulic control device 40 is installed in the control box 20, as shown in Figure 6, a plurality of pipes (41-44) and elbows (45-57) connected in a rectangular shape of the upper and lower sides The elbows 49-52 connected to the hydraulic hoses 108-111 are connected to the pipes 41 and 43, and the four differential pressure valves 80-83 are operated by a pressure difference between the four sides. ) Are installed and four hydraulic cylinders 58-61 having one free piston 62-63 inside the elbows 53-56 installed above and below the differential pressure actuating valves 81 and 83 on both sides thereof. It is installed in a position opposite to each other.

In addition, one operating rod 64 is fixed to the center of the free pistons 62 and 63, and the operating rod 64 is connected to a steering wheel of the driver's seat and moves left and right like an imaginary line according to the operation of the handle. The pistons 62 and 63 are moved in the same direction. In addition, an air discharge port 58a-61a is formed at a side of the stopper 65-68 coupled to each of the hydraulic cylinders 58-61 so that the piston rings 69-72 when the free pistons 62 and 63 rotate. ) And the air between the packing (73-76) is sucked in and discharged, the bottom of the elbow (57) is formed with an oil supply port (57a) is connected to the oil pump 84 and the pipe (85) in the vehicle body (C) do.

7 schematically shows the installation state of the present invention.

As shown, at the time of installation, the hydraulic cylinder 10 installed inside the front wheels 100 and 101 and the elbow 49 installed above the hydraulic cylinder 30 installed on both sides of the control box 20 and the hydraulic control device 40. , 50 are connected to the hydraulic hoses 104, 105, 108, and 109, and the hydraulic cylinder 10 installed in the rear wheels 102 and 103 and the hydraulic cylinder 30 installed in the center of the control box 20 and the hydraulic pressure The elbows 51 and 52 installed on the lower side of the adjusting device 40 are connected to the hydraulic hoses 106, 107, 110 and 111. In the drawings for convenience of explanation, the same alphabetical codes are assigned to those connected as shown in FIG. 7 to facilitate identification.

However, it is not necessary to connect as described above, and may be selectively connected as many times as necessary and may not be duplicated. However, the connection as described above is only taking into account the hydraulic hose length and installation convenience.

Referring to the operation and effect of the present invention constructed and installed as follows.

First, if the front wheel 100 on one side suddenly comes in contact with a protrusion such as a protrusion or a stone or a protruding block while driving a vehicle, the impact is transmitted to the axle A and the axle A is suddenly. As it is raised, the impact is immediately transmitted to the hydraulic cylinder 10 installed inside the wheel.

Therefore, the free piston 2 of the hydraulic cylinder 10 fixed to the axle A rises together with the axle A while discharging the oil inside the cylinder 1, and the discharged oil is part of the hydraulic pressure. It is sent to the hydraulic cylinder 30 in the control box 20 through the hose 104, another part is sent to the hydraulic control device 40 via the hydraulic cylinder (30). In this way, the oil supplied into the cylinder 21 of the hydraulic cylinder 30 raises the free piston 22 and the cylindrical body 23 fixed to the free piston 22. Since the coil spring 50 between the cylindrical body 23 and the fixed ring 23 is compressed by the amount of ascension, the coil spring 33 absorbs and alleviates the shock, and also the elbows of the hydraulic regulator 40 The oil supplied to 49 is supplied to the hydraulic cylinder 30 connected to the remaining elbows 50-52 through the differential pressure actuating valves 80-83, so that the other hydraulic cylinder 30 in the control box 20 distributes the impact. Absorbs and maintains the balance of the vehicle body C in the hydraulic cylinder 10 inside the other wheels 101-103.

That is, when an impact is applied to the front wheel 100, the impact is transmitted to the coil spring 33 in the control box 20 through oil, and the coil spring 33 absorbs the shock first, and the impact continues. The oil is transmitted to the remaining coil springs 33 through the oil and is absorbed secondly, and the oil is supplied to the hydraulic cylinder 10 on the remaining wheels 101-103 while passing through the hydraulic control device 40 to the vehicle body C. The equilibrium of will also be maintained.

This operation is the same even when an impact is applied to either of the rear wheels 102 and 103.

In addition, the present invention is that when one of the front and rear wheels (100, 101) is in contact with the raised portion of the road descends and eventually the rest of the wheels are raised, the operation as described above proceeds with the impact relief The equilibrium of the vehicle body C is maintained.

On the other hand, when the entire front wheels (100, 101) are in contact with the projection of the road surface to be impacted, the oil discharged from the hydraulic cylinder 10 of the front wheels (100, 101) side is controlled through the hydraulic hose (104, 105) The shock is absorbed by the coil spring 33 of the hydraulic cylinder 30 sent to the hydraulic cylinder 30 in the box 20. In this case, since the impact amount applied to the entire front wheels 100 and 101 is large, the oil pressure supplied to the elbows 49 and 50 of the hydraulic control device 40 via the hydraulic cylinder 30 in the control box 20 is also equal to that. This is because the differential pressure actuating valves 81 and 83 on both sides are closed so that oil is not supplied to the rear wheels 102 and 103.

Therefore, in this case, the impact applied to the front wheels 100 and 101 is transmitted to the hydraulic cylinder 30 and the coil spring 33 in the control box 20 connected to the inlet hoses 104 and 105 to the coil spring 33. All of them are alleviated by being absorbed and are not supplied to the rear wheels 102 and 103 at all, so that the vehicle body C does not tilt backwards and maintains equilibrium.

This operation is the same when suddenly braking, when starting suddenly or when driving on an inclined surface, even when an impact is applied to the entire rear wheels 102 and 103.

In addition, the present invention is that if one of the front and rear wheels (100-103) is in contact with the raised portion of the road descends and eventually the other wheel is raised, the operation as described above proceeds with the impact relief The equilibrium of the vehicle body C is maintained.

The above operation is the same even if the wheels on either side of the wheels on both sides is raised or lowered in contact with the projections or raised portions of the road surface, in this case up and down differential pressure operation installed in the hydraulic control device 40 in the control box 20 The valves 80 and 82 operate to block the oil supply to any one wheel so that the vehicle body C does not incline sideways and maintains equilibrium.

In addition, the present invention can supply oil to the entire device of the present invention through the oil pump 84, when the vehicle body (C) is lowered due to the deterioration of the vehicle, by operating the oil pump 84 to oil the entire device By supplying, the body C can be raised to its original height.

As described above, the present invention provides a hydraulic cylinder (10) having a free piston (2) between the axles (A, A ') and the body (C) installed inside the wheels (100-103) of the vehicle, The control box 20 on the rear trunk side is installed on the hydraulic cylinder 30 and the coil spring 33 and the hydraulic control device 40 connected to the hydraulic cylinder 10 and the hydraulic hoses 104-107 and applied to the vehicle. Since the coil spring 33 absorbs the impact of dispersion and maintains the balance, it is not only excellent in riding comfort, but also contributes to surface extension along with preventing damage to the vehicle body C.

Claims (5)

In a typical automobile, a hydraulic cylinder (10) having a free piston (2) is provided between the axles (A, A ') and the vehicle body (C) provided inside the wheels (100-103) of the automobile, and the rear trunk is provided. In the control box 2 on the side, a hydraulic cylinder 30 having a free piston 22, a coil spring 33, and a hydraulic control device 40 are installed, and the cylinder 1 of the hydraulic cylinders 10, 30 is provided. , 21) and the elbows 49-52 of the control box 20 are connected to the hydraulic hoses 104-111, respectively, so that the shock applied to the vehicle is the hydraulic cylinders 10 and 30 and the coil spring 33 and the hydraulic pressure. Shock absorber of the vehicle, characterized in that configured to be absorbed by the adjusting device (40). The hydraulic cylinder (10) of claim 1, wherein the free piston (2) inserted into the cylinder (1) is fixed to the axles (A, A '), and the cylinder (1) is fixed to the vehicle body (C). Four free pistons (2, 4) having one free piston (62, 63) inside the cylinder (1, 53) while the free piston (2) moves up and down together with the axles (A, A '). The hydraulic cylinders 58-61 are installed at opposite positions, and an operation 64 connected to a handle is fixed to the center of the free pistons 62 and 63 so that the operation 64 is free by operating the handle. A shock absorber for a vehicle, characterized in that it is configured to rotate (62, 63). According to claim 1, wherein the hydraulic cylinder 30 in the control box 20, the lower end of the cylinder 21 is connected to the hydraulic cylinder 10, the hydraulic control device 40 and the hydraulic hose (104-111) and free The cylindrical body 23 is fixed to the upper end of the piston 22, and the coil spring 33 is installed between the support 23a at the lower end of the cylindrical body 23 and the inner wall 20a of the control box 20, so that the cylinder (21) The shock absorber of the automobile, characterized in that the coil spring (33) is configured to absorb the shock when the free piston (22) and the cylindrical body (23) is raised and lowered by the hydraulic pressure supplied and sold inside. According to claim 1, wherein the hydraulic control device 40 in the control box 20 is a plurality of pipes (41-44) and elbows (45-47) connected in a rectangle connected upper and lower pipes (41, 43) The elbow (49-52) connected to the hydraulic hose (108-111) is connected to), and the four differential pressure automatic valve (80, 83) that is opened and closed by the hydraulic pressure between them is connected and installed, Four hydraulic cylinders 58-61 having one free piston 62, 63 are provided at opposite positions inside the elbows 53, 56 provided above and below the differential pressure actuating valves 81, 83 on both sides. In the center of the free piston (62, 63) between the operation 64 is connected to the handle is fixed, the operation between the operation 64 is configured to rotate the free piston (62, 63) by the handle operation Automobile shock absorbers. According to claim 4, Elbow (57) installed on the bottom of the hydraulic control device 40 is characterized in that the oil supply port (57a) is formed is connected to the oil pump 84 and the pipe (85) in the vehicle body (C) Shock absorbers of automobiles.