CN204647127U - Combined type spring-damper - Google Patents

Abstract

The utility model relates to a combined spring damper, which relates to a combined spring damper for vehicles with oil-gas suspension. Its purpose is to provide a combined spring damper, which still has a certain bearing capacity when the seal failure of the oil-pneumatic spring occurs, so that the vehicle can continue to run. The combined spring damper of the utility model comprises an outer cylinder, an inner cylinder, and a coil spring. A chamber is formed between the outer cylinder and the inner cylinder. The inner cylinder is provided with a damping hole communicating with the chamber, and the chamber is filled with Inert gas and oil, the coil spring is set in the chamber, the axis of the coil spring coincides with the axis of the inner cylinder, one end of the coil spring is on the inner wall of the inner cylinder, the other end of the coil spring is on the inner wall of the outer cylinder, and the inner cylinder There is also a steel ball damping hole connected to the chamber on the cylinder, and a steel ball is arranged in the steel ball damping hole, and one end of the inner cylinder is connected with an oil-filled and air-filled check valve, which communicates with the chamber. A combined sealing ring is used between the inner cylinder and the outer cylinder.

Description

Combined spring damper

technical field

The utility model relates to a damper, in particular to a combined spring damper for vehicles with oil-gas suspension.

Background technique

Oil-pneumatic suspension is a vehicle suspension technology with advanced technology and excellent performance. It integrates hydraulic and pneumatic transmission control technology with suspension technology. It is one of the key technologies used in modern special vehicles and large-scale vehicle shock absorption systems. , is the key to improving vehicle ride comfort and handling stability, and reducing damage to parts caused by dynamic loads.

The oil-gas spring is the elastic damping element of the oil-gas suspension. It is an elastic element with inert gas as the medium. Oil is introduced between the gas and the piston as an intermediate medium to transmit pressure. It is adjustable and has the characteristics of damping, vibration reduction and self-lubrication. Its variable stiffness and variable damping characteristics can ensure that the car has good ride comfort, and it is widely used in large-tonnage dump trucks and heavy-duty off-road vehicles.

Oil and gas sealing performance is the key characteristic of oil and gas springs. During use, when oil and gas leak due to various reasons such as wear of the seal pair, aging of the seals, scratches on the cylinder or seals by excess objects, and damage to the pipeline, it will directly As a result, the oil-pneumatic spring loses its bearing capacity, and in severe cases, the vehicle cannot continue to drive, and it must wait for rescue in place.

Utility model content

The technical problem to be solved by the utility model is to provide a combined spring damper, which still has a certain bearing capacity when the seal failure of the oil-gas spring occurs, so that the vehicle can continue to run.

The combined spring damper of the utility model comprises an outer cylinder, an inner cylinder with one end embedded in the outer cylinder and connected with the outer cylinder, a chamber is formed between the outer cylinder and the inner cylinder, and the inner cylinder is provided with a The damping hole communicated with the chamber, the chamber is filled with inert gas, and also includes a coil spring, the coil spring is arranged in the chamber, the axis of the coil spring coincides with the axis of the inner cylinder, and one end of the coil spring is supported on the On the inner wall of the inner cylinder, the other end of the coil spring is pushed against the inner wall of the outer cylinder, the inner cylinder is provided with a steel ball damping hole communicating with the chamber, the steel ball damping hole is provided with a steel ball, One end of the inner cylinder is connected with an oil-filled and air-filled one-way valve, and the oil-filled and inflated one-way valve communicates with the chamber, and the inner cylinder and the outer cylinder are sealed with a combined sealing ring.

In the combined spring damper of the utility model, the coil spring adopts a single coil spring.

The difference between the combined spring damper of the utility model and the prior art is that the combined spring damper of the utility model includes an inner cylinder, an outer cylinder, inert gas and oil filled in the chamber, and several parts of a sealing ring. Several parts are combined together to form an oil-pneumatic spring, which has the same function as the existing oil-pneumatic spring. It not only has the function of a damper, but also has the function of a spring. When the vehicle is driving on an uneven road, the inner cylinder is relatively the outer cylinder. Reciprocating movement, the charged inert gas is compressed, which has the same function as the existing oil-gas spring, and realizes the elastic damping effect. On this basis, the utility model also includes a coil spring. The compressed inert gas and the oil-gas spring formed by the inner and outer cylinders together act as the elastic components of the suspension system to buffer vibration and impact. When the seal failure of the cylinder occurs, oil and gas leakage does not have load-bearing and vibration-reducing capacity, the existence of the coil spring makes the utility model still have a certain load-bearing capacity, and the vehicle can continue to drive and drive to the maintenance point for maintenance without waiting for on-site rescue.

The combined spring damper of the present utility model will be further described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the utility model combined spring damper;

Fig. 2 is that the helical spring in the combined spring damper of the present invention is in a state of natural elongation;

Fig. 3 is the helical spring in the combined spring damper of the present invention in a compressed state.

Detailed ways

As shown in Figure 1, the combined spring damper of the present utility model includes an oil-pneumatic spring and a coil spring 2, and the oil-pneumatic spring includes an outer cylinder 3, an inner cylinder 4 that is embedded in the outer cylinder 3 and connected to the outer cylinder 3, Inert gas and oil, a chamber 7 is formed between the outer cylinder 3 and the inner cylinder 4, the inner cylinder 4 is provided with a damping hole 8 communicating with the chamber 7, the chamber 7 is filled with inert gas and oil, and the inner The cylinder 4 is provided with a steel ball damping hole 5 communicating with the chamber 7, the steel ball damping hole 5 is provided with a steel ball 9, and one end of the inner cylinder 4 is connected with an oil-filled and air-filled one-way valve 1, the oil-filled and air-filled check valve 1 One end of the valve 1 communicates with the chamber 7, and the other end is fed with oil and inert gas, and a combined sealing ring 6 is set between the inner cylinder 4 and the outer cylinder 3 for sealing. The above components are assembled together to form an oil-pneumatic spring, which has the function of a traditional oil-pneumatic spring. The combined sealing ring 6 includes a plurality of sealing rings. The coil spring 2 is arranged in the chamber 7, the axis of the coil spring 2 coincides with the axis of the inner cylinder 4, one end of the coil spring 2 is pushed against the inner wall of the inner cylinder 4, and the other end of the coil spring 2 is pushed against the inner wall of the outer cylinder 3 .

Spiral spring 2 adopts single spiral spring among the utility model. The coil spring 2 is arranged inside the utility model, the structure is simple and reliable, and the bearing capacity is improved without increasing the volume of the traditional oil-gas spring.

As shown in Figure 2, one end of the inner cylinder 4 is embedded in the outer cylinder 3, and the utility model is in a fully extended state, that is, the other end of the inner cylinder 4 is fully stretched out of the outer cylinder 3, reaching the stretching of the inner cylinder 4. At this time, the inert gas and oil in it are in a compressed state, and the coil spring 2 is a natural length.

As shown in FIG. 3 , the inner cylinder 4 is fully inserted into the outer cylinder 3 , reaching the limit of the length of the inner cylinder 4 , and at this moment, the coil spring 2 is in a compressed state.

During normal operation, the load is carried by the oil-pneumatic spring and the coil spring. The coil spring shares the load, reduces the compression degree of the inert gas, reduces the internal pressure of the combined spring damper to a certain extent, and improves safety. When the seal failure of the combined spring damper causes leakage, as the leakage increases, the carrying capacity of the compressed inert gas gradually decreases, that is, the carrying capacity of the oil-gas spring gradually decreases, and the coil spring gradually becomes the main load-bearing element. The coil spring is made of materials with good mechanical properties, high strength, and good impact toughness to reduce the weight and volume of the coil spring, such as alloy steel.

In the event of serious oil and gas leakage or even complete seal failure, the coil spring has the ability to independently load and absorb vibration, maintain the posture of the vehicle body, prevent overturning, improve driving safety, buffer vibration and impact, and ensure that the vehicle can continue to drive.

The above-mentioned embodiments are only described to the preferred implementation of the utility model, and are not limited to the scope of the utility model. Various modifications and improvements made should fall within the scope of protection determined by the claims of the utility model.

Claims (3)

1. a combined type spring-damper, it is characterized in that: comprise hydro-pneumatic spring and helical spring outer cylinder, one end to embed in outer cylinder and the inner cylinder tube be connected with outer cylinder, inert gas and fluid, chamber is formed between described outer cylinder and inner cylinder tube, described inner cylinder tube is provided with the damping hole with chamber, described inert gas and fluid are filled in chamber, described inner cylinder tube is also provided with the steel ball damping hole with chamber, steel ball is provided with in described steel ball damping hole, one end of described inner cylinder tube is connected with injecting oil and gas one-way valve, described injecting oil and gas one-way valve and chamber, between described inner cylinder tube and outer cylinder, seal ring is set, described helical spring is arranged in chamber, described helical spring axis and inner cylinder tube dead in line, described helical spring one end withstands on inner cylinder tube inwall, the described helical spring the other end withstands on outer cylinder inwall.

2. combined type spring-damper according to claim 1, is characterized in that: described helical spring is single helical spring.

3. combined type spring-damper according to claim 2, is characterized in that: described seal ring is combined seal ring.