CN1170101A

CN1170101A - Single cylinder aerating bidirectional vibration absorber

Info

Publication number: CN1170101A
Application number: CN 96108746
Authority: CN
Inventors: 王明珠
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-25
Filing date: 1996-06-25
Publication date: 1998-01-14
Anticipated expiration: 2016-06-25
Also published as: CN1066249C

Abstract

A bidirectional vibration damper of single-barrel aeration type is composed of oil cylinder, damping oil, nitrogen, piston rod and sealing cover, and features that its piston assembly composed of holddown nut, stretch valve spring, stretch valve plate, piston, piston rod, and compression valve spring and plate moves with piston and can be installed in oil cylinder, and nitrogen is aerated into the space between oil and cylinder top. When car is vibrating, oil flows through narrow gap on piston between upper and lower cavities back and forth to transform vibration energy into heat energy.

Description

Single cylinder aerating bidirectional vibration absorber

The present invention is a kind of vibration damper that Motor Vehicle such as automobile, motorcycle use, specifically gas, liquid effect single cylinder aerating bidirectional vibration absorber of being suitable for.

The two-way double barreled vibration damper that uses on the existing automobile utilizes the inner/outer tube structure, urceolus is a shoe cream room, inner core is an operating cylinder, this Shock Absorber is more, operating cylinder or piston diameter are little, and the flow through mistake oil mass of valve of operating cylinder and piston unit's stroke is little, the damping force instability, produce dither when wheel is subjected to impacting suddenly, the ground connection property of vehicle running smoothness and tire is bad; Being 94202103.7 gas liquid type shake device just like application number also, is complex structure equally, and sealing part is many, fitting surface is many, requires the machining accuracy height, and mounting process is cumbersome, the vibration damper effective travel is shorter, and the flow through mistake oil mass of valve of operating cylinder and piston unit's stroke is little, the damping force instability.

The objective of the invention is to, provide a kind of simple in structure, sealing part is few, good damping effect, the single cylinder aerating bidirectional vibration absorber that recoverability is high.

Design concept of the present invention is according to automobile, motorcycle is to the requirement of vibration damper function, utilize automobile, during motorcycle driving, vehicle frame and vehicle bridge are reciprocating, make piston to-and-fro motion in oil cylinder, vibration damper cylinder barrel inner fluid repeatedly in cylinder barrel epicoele by flowing between the cavity of resorption in narrow hole of piston and the cylinder barrel, make the vibration energy of vehicle body and vehicle frame be converted into heat energy, and absorbed by fluid and vibration damper housing, loose in atmosphere then, realize the damping purpose, simultaneously also utilized gas to the tetchy characteristics of variation in pressure, gas, the structure of liquid combination can cushion causus vibrations rapidly.

Following mode makes realization the present invention:

The present invention includes oil cylinder, damping oil, nitrogen, piston, piston rod and sealing cover, oil cylinder upwards, piston rod is downward, be equipped with the compression valve spring between the piston rod shaft shoulder and the compression valve plate, compression valve plate is provided with the normal open hole and has the annular groove of fluid passage, below annular groove, establish a compression valve check valve sheet, the top of compression valve plate is equipped with piston, have extension hole and compressing hole on the piston along circumferential arrangement, uphold hole loam cake one and uphold valve plate, uphold the annular groove that has the fluid passage on the valve plate, upholding valve plate and rebound valve spring is fastened on the piston rod by gland nut, the inner damping oil that injects of oil cylinder, open an air-filled pore on the sidewall of oil cylinder, be filled with nitrogen or inert gas between damping oil and the oil cylinder top, vibration damper leaves standstill or when working, wherein nitrogen or inert gas float over oil cylinder top, can not enter the oil cylinder cavity of resorption by piston.

The air-filled pore K of a single effect is established in the oil cylinder upper end.

Drive throttling groove in the annular groove side, annular groove upper edge of upholding on the valve plate.

Side, annular groove upper edge opening one-way throttling groove on compression valve plate.

The present invention adopts single casing, designs simplification, number of spare parts greatly reduces, and sealing part is few, good airproof performance, oil cylinder top inflation, the vibrations that produce when reducing wheel greatly and being subjected to impacting suddenly, favourable elimination noise, the effective travel of reciprocating motion of the pistons increases, the present invention is simple in structure, can repair unlimitedly, thereby reduce manufacture cost and user cost.

Fig. 1 is an overall structure schematic representation of the present invention;

Fig. 2 is Figure 1A partial enlarged drawing;

Fig. 3 is a compression valve plate one-way throttle groove schematic representation;

Fig. 4 is a compression valve plate one-way throttle groove partial top view.

Embodiment:

Between the shaft shoulder on the piston rod 11 and compression valve plate 9, be equipped with compression valve spring 10, compression valve plate 9 is pressed on the below of piston 8, have extension hole 8-2 and compressing hole 8-1 on the piston 8 along circumferential arrangement, compression valve plate 9 is provided with normal open hole 9-1 and annular groove 9-2, with establish compression valve throttle orifice 9-3 on the annular groove 9-2, a compression valve check valve sheet 9-4 is established in the below of compression valve throttle orifice 9-3, making compression valve throttle orifice 9-3 is unidirectional fluid passage, locate by circlip 9-5, uphold hole 8-2 loam cake one and uphold valve plate 6, have rebound valve throttle orifice 6-1 on the annular groove 6-2 of extension valve plate 6, upholding valve plate 6 and rebound valve spring 5 is fastened on the piston rod 11 by gland nut 4, ring installation 7 on piston 8, make gland nut 4, rebound valve spring 5, uphold valve plate 6, piston ring 7, piston 8, compression valve plate 9, compression valve spring 10, piston rod 11 parts such as grade become the piston rod assembly parts, move with piston 8, open the hole 13 of an inflation body on the oil cylinder 1, damping oil 3 is injected on oil cylinder 1 top, piston assembly is packed in the oil cylinder 1, be inserted in sealing cover 14 assembly parties then, seal ring 12 has been installed on it, 15 and dust ring 16, screw in the 1-2 circle, on special-purpose charger, 13 charge into inert gas or nitrogen 2 from the hole, screw locking, vibration damper promptly installs, also can be designed to open the air-filled pore K of a single effect in oil cylinder 1 upper end, when adopting unidirectional air-filled pore K, inflation can not carried out on special device, but after assembling, charges into gas by unidirectional air-filled pore K.

The dynamic duty process of this vibration damper is as follows:

When automobile or bike wheel roll on projection or roll out pit, wheel shift-in vehicle frame (vehicle body), vibration damper by compression, oil cylinder 1 relative piston 8 motions, piston rod 11 enters in the oil cylinder 1, because gas is to the tetchy characteristics of variation in pressure, the gas 2 of oil cylinder 1 epicoele is compressed and at first cushions, and vibrations Shaoxing opera splits, and cushion obviously more, and the interior epicoele volume of oil cylinder 1 reduces, oil cylinder 1 cavity of resorption volume increases, fluid 3 flows into cavity of resorption by epicoele, and this owing to piston rod 11 enters the oil cylinder volume-variation that oil cylinder 1 causes, then the Volume Changes by inflation body 2 compensates, when vehicle frame (vehicle body) shakes when slow, it is low that oil cylinder 1 moves downward speed, and oil pressure is not enough to overcome the pretightening force of compression valve spring 10, and compression valve throttle orifice 9-3 and normal open hole 9-1 on the just compressed valve plate 9 of fluid 3 this moment flow into oil cylinder 1 cavity of resorption; When vehicle body vibrations play is split, oil cylinder 1 moves downward the speed height, then the oil pressure of oil cylinder 1 epicoele increases severely, when reaching the pretightening force that can overcome compression valve spring 10, just push compression valve plate 9 open, make fluid 3 in a short period of time, flow into oil cylinder 1 cavity of resorption by bigger passage compressing hole 8-1, therefore oil pressure and damping force are unlikely above certain limit in compression stroke, thereby the buffer function that guarantees elastic element in the compression stroke obtains performance.

When automotive wheel rolls from projection or rolls into pit, wheel leaves vehicle frame (vehicle body), vibration damper is stretched, when wheel moves downward speed when little, the movement velocity that oil cylinder 1 makes progress is low, compression valve check valve sheet 9-4 moves upward under the promotion of oil cylinder 1 cavity of resorption oil stream, compression valve throttle orifice 9-3 closes, the just frequent through hole 9-1 of fluid 3, the rebound valve throttle orifice 6-1 that upholds on hole 8-2 and the extension valve plate 6 flow into oil cylinder 1 epicoele, because channel cross-sectional area is very little, just produce bigger damping force, make vibrations decay rapidly; When vehicle body shakes when violent, the movement velocity that oil cylinder makes progress is higher, the speed of moving on the oil cylinder 1 increases to when being enough to make the oil pressure that is produced can overcome the pretightening force of rebound valve spring 5, just push open and uphold valve plate 6, channel cross-sectional area increases, oil pressure and damping force are kept within limits, some part of vibration damper and suspension system can not damaged because of overload.

The present invention in use, oil cylinder 1 upwards, piston rod 11 is done relative movement downwards, no matter vibration damper is static or during work, inert gas that wherein charges into or nitrogen 2 always float over oil cylinder 1 top, can not enter the cavity of resorption of oil cylinder 1 by piston 8.

The rebound valve throttle orifice 6-1 that this vibration damper is upheld on the valve plate 5 also can be designed to drive throttling groove in extension side, annular groove 6-2 upper edge, compression valve throttle orifice 9-3 on the compression valve plate 9 also can make at side, annular groove 9-2 upper edge opening one-way throttling groove 9-6 and establish an one-way valve 9-7, by rivet 9-8 check valve sheet 9-7 is fixed on the compression valve plate 9, compression valve spring 10 and rebound valve spring 5 are the spring of various types.

Claims

1, a kind of single cylinder aerating bidirectional vibration absorber, comprise oil cylinder (1), damping oil (3), nitrogen (2), piston (8), piston rod (11) and sealing cover (14), it is characterized in that: oil cylinder (1) upwards, piston rod (11) is downward, be equipped with compression valve spring (10) between piston rod (11) shaft shoulder and the compression valve plate (9), compression valve plate (9) is provided with normal open hole (9-1) and has the annular groove (9-2) of unidirectional fluid passage, establish a compression valve check valve sheet (9-4) in the below of annular groove (9-2), the top of compression valve plate (9) is equipped with piston (8), have extension hole (8-2) and compressing hole (8-1) on the piston (8) along circumferential arrangement, uphold hole (8-2) loam cake one and uphold valve plate (6), uphold the annular groove (6-2) that has the fluid passage on the valve plate (6), upholding valve plate (6) and rebound valve spring (5) is fastened on the piston rod (11) by gland nut (4), the inner damping oil (3) that injects of oil cylinder (1), open an air-filled pore (13) on the sidewall of oil cylinder (1), be filled with nitrogen or inert gas (2) between damping oil (3) and oil cylinder (1) top, vibration damper leaves standstill or when working, wherein nitrogen or inert gas (2) float over oil cylinder (1) top, can not enter oil cylinder (1) cavity of resorption by piston (8).

2, vibration damper according to claim 1 is characterized in that: establish the air-filled pore K of a single effect in oil cylinder (1) upper end.

3, vibration damper according to claim 1 is characterized in that: uphold on the annular groove on the valve plate (6) and open a rebound valve throttle orifice (6-1) or drive throttling groove along the annular groove side.

4, vibration damper according to claim 1 is characterized in that: open a unidirectional compression valve throttle orifice (9-1) on the annular groove on the compression valve plate (9) or along annular groove side opening one-way throttling groove.

5, vibration damper according to claim 1 is characterized in that: compression valve spring (9) and rebound valve spring (6) are the spring of various types.