CN210889882U

CN210889882U - FCD shock absorber with frequency-selecting function

Info

Publication number: CN210889882U
Application number: CN201921151207.3U
Authority: CN
Inventors: 李国华; 张勇; 谢毅; 曾强; 严茂; 葛文军; 龚建文; 夏正旺; 李扬剑; 汪文杰; 胡兰
Original assignee: Chengdu Jiuding Technology Group Co Ltd
Current assignee: Chengdu Jiuding Technology Group Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-06-30
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a FCD shock absorber with frequency-selecting effect, including working cylinder, piston rod, piston, the piston is fixed in on the piston rod, the piston rod is connected during the one end of piston inserts the working cylinder, the piston is kept apart into the working cylinder and is gone up cylinder body and lower cylinder body, be provided with at least one normal through-hole in the piston, the one end that the piston rod is located down the cylinder body is provided with the FCD valve system, and the effect through the FCD valve system makes the FCD shock absorber can have the damping force under the low frequency effect and be the biggest, and the damping force is minimum under the high frequency effect, realizes the frequency-selecting performance.

Description

FCD shock absorber with frequency-selecting function

Technical Field

The utility model belongs to the technical field of automobile shock absorber.

Background

The shock absorber is the most precise and complicated mechanical part in the automobile suspension system, and is used for inhibiting the vibration of rebound after the shock absorption of a spring and the impact from a road surface through damping force generated inside, and quickly attenuating the vibration of a vehicle body caused by an uneven road surface so as to improve the running smoothness of an automobile.

In order to achieve good steering response and yaw response of a front shaft after small-angle input of a steering wheel, a traditional passive shock absorber eliminates a 'response dead zone', and needs to improve low-speed damping force of the shock absorber, particularly to recover the low-speed damping force. However, the high-frequency vibration isolation effect of the floor and the seat on the general asphalt road and the general cement road is poor, the motion of the vehicle body becomes tighter and loses the soft feeling, and even the situation that the passenger shakes head left and right on the asymmetrical road surface is caused, so that the operation stability and the comfort of the vehicle are poor, because the traditional passive vibration absorber cannot adjust the proper restoring damping force according to the frequency at low speed, and although the problem of the active vibration absorber can be solved to a certain extent, the cost is very high, and the large-area application in engineering is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: an FCD damper with frequency selective action is provided to solve the problems mentioned in the background above.

The utility model adopts the technical scheme as follows:

an FCD shock absorber with a frequency selection function comprises a working cylinder, a piston rod and a piston, wherein the piston is fixed on the piston rod, one end, connected with the piston, of the piston rod is inserted into the working cylinder, the piston separates the working cylinder into an upper cylinder body and a lower cylinder body, at least one normally-through hole is formed in the piston, an FCD valve system is arranged at one end, located on the lower cylinder body, of the piston rod, a cavity is arranged in the FCD valve system, a valve system assembly is arranged in the cavity and divides the cavity into an upper cavity body and a lower cavity body, a piston rod opening is formed in one end, located on the upper cylinder body, of the piston rod, a through hole is formed in the piston rod to be connected with the upper cavity body, a normally-flow hole communicated with the lower cavity body and the lower cylinder body is formed in the lower cavity body, when the piston rod moves upwards, working fluid of the upper, when the working frequency of the shock absorber is greater than the minimum acting frequency of the FCD valve system, the valve system component is elastically deformed by the thrust of the working fluid, the upper cavity is communicated with the lower cavity, and the working fluid enters the lower cavity and flows out of the constant flow hole.

Further, the FCD valve system comprises an inner valve seat and a valve sleeve, the inner valve seat is of a hollow cylindrical structure with a convex section, the valve sleeve is of a bottle cap-shaped structure with an opening at one end, and the opening end of the valve sleeve is connected with the inner valve seat to form a cavity.

Furthermore, the valve system component comprises an upper valve system and a lower valve system component, the upper valve system and the lower valve system component are respectively arranged on the valve sleeve through a fixing piece, the upper valve system and the lower valve system component are respectively sleeved on the fixing piece, the upper valve system can axially slide along the fixing piece, and the upper valve system divides the cavity into an upper cavity and a lower cavity which are independent.

Furthermore, the lower valve system component comprises a lower valve system and a support frame arranged between the upper valve system and the lower valve system, the support frame is of a sleeve structure with an opening at one end, the opening end face of the support frame is connected with the end face of the lower valve system close to the outer edge in a matched mode, and the other end face of the support frame is connected with the upper valve system.

Furthermore, the upper valve system and the lower valve system are both composed of more than one elastic valve plate, and the elastic valve plates in the upper valve system and the lower valve system are sequentially stacked.

Further, interior disk seat includes interior disk seat body and link, and interior disk seat body is for sealing, the other end is open-ended cavity structure for one end, and interior disk seat body blind end is provided with the connector, the link sets up the connector department on the interior disk seat body, is provided with the mounting hole that feeds through to interior disk seat cavity on the link, the threaded connection between the interior disk seat on the mounting hole of interior disk seat and the piston rod connection.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model discloses simple structure, when the piston rod upward movement, go up during cylinder working solution gets into the FCD valve through the piston rod trompil and is gone up the cavity, when shock absorber operating frequency is greater than the minimum operating frequency of FCD valve system, the thrust of working solution makes the valve system subassembly produce elastic deformation, goes up cavity and lower cavity intercommunication, and the working solution gets into the internal outflow of following the constant current hole of cavity down. The problem that the traditional passive shock absorber cannot adjust proper restoring damping force according to the frequency at low speed is solved, the damping force in a certain frequency range is adjustable, and the frequency selection effect is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

Fig. 2 is a schematic diagram of the FCD valve system of the present invention.

The labels in the figure are: 1-working cylinder, 2-piston rod, 3-piston, 4-upper cylinder body, 5-lower cylinder body, 6-constant through hole, 7-FCD valve system, 8-inner valve seat, 9-valve sleeve, 10-upper valve system, 11-lower valve system component, 12-upper cavity, 13-lower cavity, 14-constant flow hole, 111-lower valve system, 112-support frame, 15-elastic valve plate, 16-bolt, 17-gasket, 18-annular boss, 19-mounting hole, 20-limiting boss, 21-positioning hole and 22-piston rod opening hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1 and 2, an FCD damper with frequency-selective function according to a preferred embodiment of the present invention includes a working cylinder 1, a piston rod 2 and a piston 3, wherein the piston 3 is fixed on the piston rod 2, one end of the piston rod 2 connected to the piston 3 is inserted into the working cylinder 1, the piston 3 separates the working cylinder 1 into an upper cylinder 4 and a lower cylinder 5, at least one normally-through hole 6 is provided in the piston 3, an FCD valve system 7 is provided at one end of the piston rod 2 located in the lower cylinder 5, a cavity is provided in the FCD valve system 7, a valve system component 11 is provided in the cavity, the valve system component separates the cavity into an upper cavity 12 and a lower cavity 13, a piston rod opening 22 is provided at one end of the piston rod located in the upper cylinder, the piston rod opening 22 is connected to the upper cavity 12 along an inner portion of the piston rod to form a through hole, the lower cavity 13 is provided with a normally-flow hole 14 communicating the lower cavity, when the piston rod 2 moves upwards, working fluid of the upper cylinder 4 enters the upper cavity 12 of the FCD valve system through the opening of the piston rod 2, when the working frequency of the shock absorber is larger than the minimum action frequency of the FCD valve system 7, the valve system assembly 11 generates elastic deformation by the thrust of the working fluid, the upper cavity 12 is communicated with the lower cavity 13, and the working fluid enters the lower cavity 13 and flows out of the constant flow hole 14.

The FCD valve system 7 comprises an inner valve seat 8 and a valve sleeve 9, the inner valve seat 8 is of a hollow cylindrical structure with a convex section, the valve sleeve 9 is of a bottle cap-shaped structure with one end open, the open end of the valve sleeve is connected with the inner valve seat 8 to form a cavity, an upper valve system 10 and a lower valve system component 11 are sequentially arranged in the cavity, the upper valve system 10 and the lower valve system component 11 are respectively arranged on the valve sleeve 9 through a fixing piece, the upper valve system 10 and the lower valve system component 11 are respectively sleeved on the fixing piece, the upper valve system 10 can slide along the axial direction of the fixing piece, the upper valve system 10 divides the cavity into an independent upper cavity 12 and a lower cavity 13, at least one normal flow hole 14 is arranged on the lower cavity 13 part of the valve sleeve 9, when the shock absorber where the FCD valve is located is in a recovery stroke, the recovery valve system on the shock absorber moves upwards, the cylinder oil pressure of the recovery valve system rises, and working liquid enters the upper, when the working frequency of the shock absorber is between the minimum action frequency and the maximum action frequency of the FCD valve, the thrust of working fluid enables the upper valve system 10 to generate elastic deformation, the working fluid can enter the lower cavity 13 and flow out of the constant flow hole 14, the function of the working fluid is equivalent to increasing the flow area of the restoration valve system, the upper cylinder body of the restoration valve system is quickly decompressed, and the restoration stroke damping force is reduced; when the working frequency of the shock absorber is greater than the maximum action frequency of the FCD valve, the lower valve system assembly 11 generates elastic deformation by the thrust of working fluid, the upper valve system 10 moves towards the lower valve system assembly 11 along the fixing piece while elastically deforming, so that the flow gap between the upper valve system 10 and the inner valve seat 8 is larger, the working fluid can enter the lower cavity 13 more quickly and flows out from the constant flow hole 14, the function of the working fluid is equivalent to increasing the flow area of the recovery valve system, the recovery valve system on the shock absorber is helped to quickly release pressure of the upper cylinder body, the recovery stroke damping force is further reduced, and the riding comfort of an automobile is improved. The design solves the problem that the damping force of the FCD valve is not adjusted along with the frequency, and the FCD valve can change according to the predicted damping force adjusting frequency band under the action of different frequencies, so that the purpose of frequency selection is achieved.

The lower valve train assembly 11 includes a lower valve train 111 and a support frame 112 disposed between the upper valve train 10 and the lower valve train 111, the support frame 112 is a sleeve structure with an opening at one end, an opening end face of the support frame 112 is connected with an end face of the lower valve train 111 close to an outer edge in a matching manner, and the other end face of the support frame 112 is connected with the upper valve train 10.

The upper valve system 10 and the lower valve system 111 are composed of more than one elastic valve sheet 15, the elastic valve sheets are sequentially stacked, and the diameter of the elastic valve sheet 15 of the lower valve system 111 close to the support frame 112 is larger than that of the elastic valve sheet 15 at the other end. The diameter of the elastic valve sheet 15 of the upper valve system 10 close to the inner valve seat 8 is larger than that of the elastic valve sheet 15 close to the lower valve system component 11. The fixing part is a bolt 16 arranged on the valve sleeve, the upper valve system 10 and the lower valve system assembly 11 are fixedly connected in the valve sleeve 9 through the bolt 16, gaskets 17 are respectively arranged among the upper valve system 10, the lower valve system assembly 11 and the valve sleeve 9, and the diameter of each gasket 17 is smaller than that of the elastic valve plate 15.

An annular boss 18 is arranged at the bottom of the inner valve seat 8, and the outer end face of the annular boss 18 is in sealing contact connection with the end face of the upper valve system 10 at a position close to the outer edge of the upper valve system 10. Interior disk seat 8 includes interior disk seat body and link, and interior disk seat body is one end for sealing, the other end is open-ended cavity structure, and interior disk seat body blind end is provided with the connector, the link sets up the connector department on the disk seat body including, is provided with the mounting hole 19 that feeds through to interior disk seat cavity on the link, sets up mounting hole 19 on the disk seat including and is used for threaded connection piston rod 2. The valve train is mounted to the piston rod. The valve barrel 9 is in threaded connection with the inner valve seat 8, the valve barrel 9 is sleeved on the inner valve seat 8 and is fixedly connected with the inner valve seat 8, and the inner wall of the valve barrel 9 is provided with an annular limiting boss 20 for limiting the position of the inner valve seat 8 in the valve barrel 9. The bottom of the valve sleeve 9 is provided with more than one positioning hole 21 matched with the screwing tool so as to facilitate the assembly and disassembly between the valve sleeve and the inner valve seat.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An FCD damper with frequency selective action, characterized by: the damper comprises a working cylinder, a piston rod and a piston, wherein the piston is fixed on the piston rod, one end of the piston rod, which is connected with the piston, is inserted into the working cylinder, the piston separates the working cylinder into an upper cylinder body and a lower cylinder body, at least one normally-through hole is arranged in the piston, one end of the piston rod, which is positioned in the lower cylinder body, is provided with an FCD valve system, a cavity is arranged in the FCD valve system, a valve system component is arranged in the cavity, the cavity is divided into an upper cavity and a lower cavity by the valve system component, one end of the piston rod, which is positioned in the upper cylinder body, is provided with a piston rod opening, the piston rod opening forms a through hole along the interior of the piston rod to be connected with the upper cavity, the lower cavity is provided with a normally-flowing hole which is communicated with the lower cavity and the lower cylinder body, when the piston rod moves upwards, working, the valve system component generates elastic deformation by the thrust of the working fluid, the upper cavity is communicated with the lower cavity, and the working fluid enters the lower cavity and flows out of the constant flow hole.

2. An FCD damper with frequency selective action according to claim 1, wherein: the FCD valve system comprises an inner valve seat and a valve sleeve, the inner valve seat is of a hollow cylindrical structure with a convex section, the valve sleeve is of a bottle cap-shaped structure with an opening at one end, and the opening end of the valve sleeve is connected with the inner valve seat to form a cavity.

3. An FCD damper with frequency selective action according to claim 2, wherein: the valve system assembly comprises an upper valve system and a lower valve system assembly, the upper valve system and the lower valve system assembly are respectively arranged on the valve sleeve through a fixing piece, the upper valve system and the lower valve system assembly are respectively sleeved on the fixing piece, the upper valve system can axially slide along the fixing piece, and the upper valve system divides the cavity into an upper cavity and a lower cavity which are independent; the lower valve system component comprises a lower valve system and a support frame arranged between the upper valve system and the lower valve system, the support frame is of a sleeve structure with one open end, the open end face of the support frame is connected with the end face of the lower valve system close to the outer edge in a matched mode, and the other end face of the support frame is connected with the upper valve system.

4. A FCD damper with frequency selective action according to claim 3, wherein: the upper valve system and the lower valve system are composed of more than one elastic valve plate, and the elastic valve plates in the upper valve system and the lower valve system are sequentially stacked.

5. An FCD damper with frequency selective action according to claim 2, wherein: the inner valve seat comprises an inner valve seat body and a connecting end, the inner valve seat body is of a cavity structure with one end being closed and the other end being open, a connecting port is formed in the closed end of the inner valve seat body, the connecting end is arranged at the connecting port of the inner valve seat body, a mounting hole communicated to the cavity of the inner valve seat is formed in the connecting end, and the piston rod is connected to the mounting hole of the inner valve seat and is in threaded connection with the inner valve seat.