CN102900800A - Hydraulic shock absorber with butterfly-shaped annular springs - Google Patents

Abstract

The invention provides a disc-shaped annular spring hydraulic shock absorber, which belongs to the technical field of hydraulic shock absorbers. Hydraulic shock absorbers are common, oil leakage, heat dissipation and adjustment problems. The feature of the present invention is that the multi-layer disc spring rings are welded into upper and lower oil chambers, and the plate piston and piston rod are used to push the oil chamber to produce elastic deformation so that the volume changes instead of the piston in the oil cylinder, and there is no movement of the piston and piston rod. And sealing, so long-term use does not leak oil. The oil is externally circulated through the controller, so it is easy to adjust, control and dissipate heat. It is mainly used in occasions where hydraulic shock absorbers are required.

Description

Disc ring spring hydraulic shock absorber

technical field

The invention belongs to the technical field of hydraulic shock absorbers, in particular to a hydraulic shock absorber. the

Background technique

Hydraulic shock absorbers at home and abroad are composed of a cylinder or a piston with a small hole in the cylinder and a piston rod. The piston separates the cylinder into two parts, and the hydraulic oil is sealed in it. The piston and the cylinder are respectively installed in relative vibration. On the two objects, the hydraulic oil flows back and forth from the small hole during vibration, and the vibration energy is consumed by the viscosity of the oil. There are three problems in this shock absorber. One is that long-term movement will cause the seals of the piston and piston rod to wear and leak oil and fail, which is known as a world problem. The shock absorber produced by a domestic factory failed due to oil leakage not long after it was installed on the third bridge of Qiantang River. The shock absorber produced by an American company installed during the construction of the Southern California Bridge in the United States only lasted for two years, but it could not be used due to serious oil leakage, so the shock absorber was replaced. The second is that the characteristics of the shock absorber cannot be changed after the design and processing of the damping hole on the piston; the third is the problem of heat dissipation. When the working state of the shock absorber makes the amount of oil flowing through the damping hole large and the flow rate is fast, the heat generated is large , limited by the structure, the thermal energy cannot be dissipated, the oil temperature rises, and the oil expansion coefficient is greater than that of the cylinder block, resulting in a large internal pressure and increasing the risk of oil leakage. Negative internal pressure is generated when it is cooled. If elastic oil is used, the internal pressure can be reduced, but the performance of the shock absorber will be changed. the

Contents of the invention

The technical problems to be solved are firstly no oil leakage, secondly, adjustable and controllable damping holes, and thirdly, convenient heat dissipation. the

The technical solution adopted is to use a structure similar to a disc spring to form two elastically deformable oil chambers. When the elastically deformable volume of one oil chamber is pushed to become larger, the elastically deformable volume of the oil chamber on the other side becomes smaller, replacing the existing vibration damping. The function of the oil cylinder and piston of the device. A disc-shaped ring spring hydraulic shock absorber, including a piston and an outer cylinder, the bottom of the upper oil chamber is fixedly connected to the upper surface of the piston plate, the top of the lower oil chamber is fixedly connected to the lower surface of the piston plate, and a screw is arranged in the center of the piston plate. hole, the piston rod is connected with the piston plate through threads, and the end of the piston rod with the installation hole fits through the lower end plate; the upper oil chamber and the lower oil chamber are composed of multiple disc-shaped ring springs, and the top of the upper oil chamber is provided with a through hole Through the upper oil nozzle of the end plate, the upper oil nozzle is connected to the upper oil pipe, the bottom of the lower oil chamber is provided with the lower oil nozzle passing through the lower end plate, the lower oil nozzle is connected to the lower oil pipe, and a controller is installed between the upper oil pipe and the lower oil pipe; multi-piece disc ring There are eight evenly distributed oil holes at the junction of each layer of rings of the spring, and the upper and lower oil chambers are located in the outer cylinder. the

The controller is a regulating valve, including a manual control valve, a machine control valve, and a solenoid valve. the

Compared with prior art, the beneficial effect of the present invention is:

The invention has a simple structure, and the hydraulic oil of the two cavities can be led out by the oil pipe, and the flow between the two cavities can be regulated through the controller. One is that the piston and the piston rod are not in contact with the oil medium, which solves the problem of oil leakage after long-term use; the other is that the controller can be a manual control valve to adjust the size of the damping hole as needed, or it can be a mechanical movement control The machine-controlled valve can be adjusted by the motion state of the vibration-reducing structure, or it can be a solenoid valve, and the size of the damping hole can be adjusted by an electric signal; the third is that the length of the oil pipe or the heat dissipation structure can be used to meet the heat dissipation needs. the

Description of drawings:

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present invention. the

Detailed ways:

Figure 1 shows that a specific embodiment of the present invention is a disc-shaped ring spring hydraulic shock absorber, its structure is: the center of the upper mounting hole 1 and the lower mounting hole 2 is an annular body connected to the center, it Each layer of discs is a disc-shaped ring spring, and eight oil holes 4 are evenly distributed in each layer of circles. The disc-shaped ring spring is stamped with a spring steel sheet. The first disc spring ring is welded on the upper surface of the piston plate 5, and the piston plate is a disc, which has the same function as the piston of the existing shock absorber. Its diameter is the same as the disc spring ring, and the center has a screw hole. Piston rod 6 is threadedly connected with it, and the second sheet is stacked after the first sheet is welded, and the welding ring is welded in a week earlier, and the outer welding ring 8 is welded at the position of the inner ring 7. When welding the third piece, it should be aligned with the oil hole 4 of the second piece. The oil in the upper and lower oil chambers can flow through the respective oil holes (4), and first weld the periphery of the oil hole, and then weld the inner welding ring and the outer ring. Welding rings are welded to the top piece in turn. This piece is first welded with a threaded oil nozzle 9, and then passes through the hole of the upper end plate 10, and can be screwed on the oil pipe 11, and the other end of the oil pipe is connected to the controller. 12. The multi-layer disc-shaped annular spring is welded together to form an upper oil chamber 13, and the oil in the upper oil chamber 13 can flow through eight oil holes, and the oil hole diameter is larger, so it is not needed to form a damping force. Weld the lower oil chamber 14 in the same way, and the lower oil nipple 15 with thread passes through the hole of the lower end plate 17, and the oil in the lower oil chamber 14 can receive the controller 12 through the lower oil nipple 15 and the lower oil pipe 16. The diameters of the upper end plate 10 and the lower end plate 17 are slightly larger than the diameter of the outer welding ring. The two ends of the outer cylinder 18 are welded on the upper end plate 10 and the periphery of the lower end plate 17. Ring springs always work under preload. Oil is injected into the upper and lower oil chambers through the upper and lower oil nozzles 15. Install the shock absorber on two relatively vibrating objects through the upper and lower mounting holes. When the distance between the two objects becomes smaller, the multi-layer disc-shaped ring spring in the upper oil chamber is compressed, and the volume becomes smaller, and the lower oil chamber 14 is pulled. Stretch, volume becomes bigger, and oil flows to controller 12 through upper oil pipe 11 from upper oil nozzle 9, flows to lower oil cavity 14 through lower oil pipe 16, lower oil nozzle 15 again. In this way, the movement and sealing of the piston 5 and piston rod 6 are not in contact with oil, as long as the fatigue limit of the material is not exceeded. Part of the vibration energy is consumed and dissipated in the upper and lower oil pipes, and the main vibration energy is consumed in the controller. the

Because the oil in the upper and lower chambers circulates through the controller, this kind of shock absorber is very flexible to use. The controller can be a manual finished speed control valve, and it is convenient to adjust the damping coefficients of the same type of shock absorber to different ones. The controller can also be a mechanical motion control valve, using the displacement of the relative vibrating object to control the size or opening of the damping hole. The controller can also be a solenoid valve, which controls the working state of the orifice with an electric signal. the

The shock absorber has a certain spring action. the

Claims (2)

1. A disc-shaped annular spring hydraulic shock absorber, comprising a piston and an outer cylinder, is characterized in that the bottom of the upper oil chamber (13) is affixed to the upper surface of the piston plate (5), and the top of the lower oil chamber is connected to the piston plate (5) The lower surface is fixed, the center of the piston plate (5) is provided with a screw hole, the piston rod (6) is connected with the piston plate (5) through threads, and the end of the piston rod (6) with the mounting hole (2) is clearance fit Through the lower end plate (17); the upper oil chamber (13) and the lower oil chamber (14) are composed of multiple disc-shaped ring springs (3), and the top of the upper oil chamber is provided with an oil nozzle that passes through the end plate (10) (9), the upper oil nozzle (9) is connected to the upper oil pipe (11), the bottom of the lower oil chamber is provided with the lower oil nozzle (15) passing through the lower end plate (17), the lower oil nozzle (15) is connected to the lower oil pipe (16), and the upper oil pipe (11) is provided with controller (12) between lower oil pipe (16); The junction of every layer of circle of multi-disc ring spring (3) is all provided with eight oil holes (4) evenly distributed. ), the upper and lower oil chambers are all located in the outer cylinder (18). 2. A disc-shaped ring spring hydraulic shock absorber as claimed in claim 1, characterized in that the controller (12) is a regulating valve, including a manual control valve, a machine control valve, and a solenoid valve.

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