阅读说明：本技术 双面活塞阀减震器 (Double-sided piston valve shock absorber ) 是由 任宪奇 谈磊 孙磊 马家桢 于 2018-06-28 设计创作，主要内容包括：本发明涉及一种双面活塞阀减震器。包括贮油缸(1),设置在贮油缸(1)内的工作缸(2),所述工作缸(2)上设置有活塞杆(3),所述活塞杆(3)上设置有双面活塞(4)。本发明通过对产品内部阀系的重新设计,使得阀系的阻尼力值的可调范围更加宽广,阻尼力值更加稳定,阀系响应更加迅速,客户满意度显著提高。(The invention relates to a double-sided piston valve shock absorber. The hydraulic cylinder comprises an oil storage cylinder (1) and a working cylinder (2) arranged in the oil storage cylinder (1), wherein a piston rod (3) is arranged on the working cylinder (2), and a double-sided piston (4) is arranged on the piston rod (3). By redesigning the valve system in the product, the adjustable range of the damping force value of the valve system is wider, the damping force value is more stable, the valve system response is quicker, and the customer satisfaction is obviously improved.)

1. The double-sided piston valve shock absorber is characterized by comprising an oil storage cylinder (1) and a working cylinder (2) arranged in the oil storage cylinder (1), wherein a piston rod (3) is arranged on the working cylinder (2), and a double-sided piston (4) is arranged on the piston rod (3).

2. A double-sided piston valve shock absorber according to claim 1, wherein three flow holes (5) are provided in the double-sided piston (4), the cross-sectional shape of the flow holes (5) being elliptical holes.

3. A double-sided piston valve shock absorber according to claim 2, characterized in that the flow holes (5) are of a abrupt construction in axial direction.

4. A double-sided piston valve shock absorber according to claim 3, wherein the flow holes (5) are in the form of small elliptical holes, large elliptical holes and small elliptical holes alternating in sequence along the axial position.

5. A double sided piston valve shock absorber according to claim 3, wherein the flow holes (5) are in the form of a circular arc structure with large ends and small middle in the axial direction.

Technical Field

The invention relates to a double-sided piston valve shock absorber, and belongs to the technical field of shock absorbers.

Background

The hydraulic shock absorber is very popular with customers due to the excellent shock absorption performance and high cost performance. And the piston valve is an essential key part of the hydraulic shock absorber. Conventional hydraulic shock absorbers typically use a single sided piston valve. However, due to the special structure of the single-sided piston, the damping force value is only generated during stretching, and the damping force value is generated by a compression valve during compression, so that the application range of the damping force value is single, and the bounce of the damping force value is large at different speeds. When some vehicle types use the valve system, even abnormal sound is generated, which affects the actual use and causes customer complaints.

Disclosure of Invention

The present invention is directed to the above-mentioned drawbacks, and aims to provide a double-sided piston valve shock absorber with a reasonable structure and a faster valve train response.

The technical scheme adopted by the invention is as follows: the double-sided piston valve shock absorber comprises an oil storage cylinder (1) and a working cylinder (2) arranged in the oil storage cylinder (1), wherein a piston rod (3) is arranged on the working cylinder (2), and a double-sided piston (4) is arranged on the piston rod (3).

Three circulation holes (5) are formed in the double-sided piston (4), and the cross section of each circulation hole (5) is an elliptical hole.

The flow holes (5) are in a variable structure form along the axial direction.

The circulation holes (5) adopt a structure form that small elliptical holes, large elliptical holes and small elliptical holes are sequentially alternated along the axial position.

The circulation hole (5) is in a circular arc structure form with two large ends and a small middle part along the axial direction.

The invention has the advantages that: by redesigning the valve system in the product, the adjustable range of the damping force value of the valve system is wider, the damping force value is more stable, the valve system response is quicker, and the customer satisfaction is obviously improved.

The flow hole is designed into a sudden change structure form, so that the adjustable range of the damping force value of the valve system is wider, the damping force value is more stable, the valve system responds more quickly and the customer satisfaction is remarkably improved by utilizing the change of the section area and the change of the flow speed.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 and 3 are schematic structural views of the flow hole of the present invention.

In the figure, 1 is an oil storage cylinder, 2 is a working cylinder, 3 is a piston rod, 4 is a double-sided piston, and 5 is a circulation hole.

Detailed Description

The double-sided piston valve shock absorber comprises an oil storage cylinder 1 and a working cylinder 2 arranged in the oil storage cylinder 1, wherein a piston rod 3 is arranged on the working cylinder 2, and a double-sided piston 4 is arranged on the piston rod 3.

The double-sided piston 4 is provided with three circulation holes 5, and the cross section of each circulation hole 5 is an elliptical hole.

The flow holes 5 are of a tapered structure in the axial direction.

The flow holes 5 adopt a structural form that small elliptical holes, large elliptical holes and small elliptical holes are sequentially alternated along the axial position.

The circulation hole 5 is in a circular arc structure form with two large ends and a small middle part along the axial direction.

The flow holes on the double-sided piston valve are 3 circular holes with the diameter of 2.0 when the double-sided piston valve is initially designed, and the product force value is not the same when the double-sided piston valve is actually debugged, particularly at high speed. After the circular holes on the double-sided piston are changed into three elliptical holes, the area of the circulation hole 5 is enlarged, and the problem is successfully solved.

The valve line surface on the double-sided piston is designed on the same plane at first, and when the force value is actually adjusted, the force value is not stable enough. The valve plate has the advantages that the valve line surface of the inner surface and the valve line surface of the outer surface of the piston valve are changed into the valve line surface of the outer surface, which is 0.03 higher than the valve line surface of the inner surface, so that the assembled valve plate can generate certain pretightening force, and the problem is successfully solved.

The durability requirement is as follows: the improved S433 double-sided piston valve shock absorber is arranged on an endurance test bench for endurance test, and after the endurance test, the shock absorber is retested, and the performances of the shock absorber are not lower than the design requirements, which indicates that the endurance meets the requirements.