CN201461832U

CN201461832U - Hydraulic type damping strut

Info

Publication number: CN201461832U
Application number: CN2009201285718U
Authority: CN
Inventors: 黄晋荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-05-12
Anticipated expiration: 2019-08-25

Abstract

The utility model relates to a hydraulic type damping strut which is used for a suspension system of a vehicle, in particular to a damping strut which adopts liquid as a medium of energy transfer and damping. The hydraulic type damping strut comprises a lower cylinder barrel (1), a lower piston arm (2), a lower oil seal (3), a lower piston (4), a control valve (5), an upper piston (6), an upper oil seal (7), an upper piston arm (8), a strut spring (9), a cylinder barrel seal gasket (10), a liquid chamber A (11), a liquid chamber B (12), a shock preventing gasket (13), a shock preventing card (14), a liquid adding nozzle (15), an exhaust nozzle (16), an upper cylinder barrel (17), a spring fixing cover (18) and liquid (19), wherein the control valve (5) comprises a fixed frame (5a), a vibration preventing seal gasket (5b), a control valve plate (5c), a damping liquid discharge hole (5d), a reset spring (5e) and a liquid passage (5f). The hydraulic type damping strut is characterized by provided with two sets of up-and-down hydraulic cylinders, including the lower cylinder barrel (1) and the upper cylinder barrel (17); the middle of the lower cylinder barrel (1) is provided with the control valve (5) for seperating the lower cylinder barrel (1) into the liquid chamber A (11) and the liquid chamber B (12), the diameter of the liquid chamber B (12) is larger than that of the liquid chamber A (11), and the liquid chamber A (11) and the liquid chamber B (12) are filled with the liquid (19); and the liquid (19) is used as the medium of energy transfer and damping. The utility model greatly improves the comfort and control performance of the vehicle.

Description

The hydraulic type shock strut

One, technical field

The utility model belongs to vehicle shock absorber and pillar, and is particularly a kind of with the shock strut of liquid as energy transfer and damping medium.

Two, background technique

Weigh one of key factor of performances of motor vehicles quality, it is the performance condition of shock strut in the suspension system, and the suspension system of present most of vehicle adopts MacPherson type more, passive type shock struts such as two fork arm type equals, cartridge type damper and helical spring are installed in parallel, promptly, form incorporate shock strut at cartridge type damper outer race one helical spring, belong to the passive type shock strut, though advantages such as installing space is little are arranged; But the cartridge type damper is owing to the defective in the design and the factor of working environment, and shock strut is when compression and stretching, extension, and the cartridge type damper is easy to be drawn as vacuum, influences performance, causes leakage of oil, and has great compression damping power.These all influence the travelling comfort of vehicle and handling.

Three, summary of the invention

The purpose of this utility model is to design a kind of new Type of Hydraulic shock strut that is different from above-mentioned prior art structure characteristic fully.Be designed to two cover oil hydraulic cylinders up and down, two cover pistons, its upper piston arm and pillar spring are installed in series, and have designed control valve between two cylinders, and have the damping taphole; Following cylinder barrel is isolated into two liquid chambers, and the diameter of one of them liquid chamber is bigger than the diameter of another liquid chamber, comes the flow velocity and the flow of controlling liquid with the damping taphole, forms new integrated hydraulic formula shock strut; Utilize opening and close and transmitting vibration energy of control valve again, and the slow release of energy, reach the purpose of energy transfer and damping.Thereby overcome in the existing shock strut, when compression and stretching, extension, easily be drawn as vacuum, influenced performance, caused the defective of leakage.And there is not compression damping power, greatly improved the travelling comfort of vehicle and handling.

The technical solution adopted in the utility model is as follows.

A kind of hydraulic type shock strut, include down cylinder barrel, go up cylinder barrel, lower piston arm, upper piston arm, down oil sealing, go up oil sealing, lower piston, upper piston, A liquid chamber, B liquid chamber, control valve (forming), crash pad, erosion control card, liquid feeding mouth, exhaust nozzle, cylinder barrel sealing gasket, pillar spring, spring fixed cover, liquid by position shelf, sealing antivibration pad, control valve plate, damping taphole, Returnning spring, fluid passage; It is characterized in that: designed two cover oil hydraulic cylinders up and down, promptly descended cylinder barrel and last cylinder barrel, following cylinder barrel is a "T"-shaped cylinder body; Between two cylinders, designed control valve, and had the damping taphole, following cylinder barrel has been isolated into two liquid chambers, i.e. A liquid chamber and B liquid chamber, and the diameter of B liquid chamber is bigger than the diameter of A liquid chamber, and full of liquid; With liquid as energy transfer and damping medium; Control opening and closing of control valve by the last current downflow of liquid, reach the transmission vibration energy, and the slow release of vibration energy; It is characterised in that: lower piston and lower piston arm are housed in the following cylinder barrel, and are with down oil sealing; Upper piston and upper piston arm are housed in the last cylinder barrel, and last cylinder barrel upper end is with oil sealing, is with the pillar spring on the upper piston arm, and pillar spring periphery is equipped with the spring fixed cover, and the upper piston arm is one " m " shape; Its feature also is: on the control valve plate in the control valve Returnning spring is housed, and having the damping taphole, position shelf is equipped with in control valve plate bottom, has fluid passage on its position shelf, between control valve plate and the position shelf sealing gasket is housed, and is installed in down on the cylinder barrel with the erosion control card.

Hydraulic type shock strut of the present utility model is installed between wheel and the vehicle frame, when not in use, whole shock strut remains static, A, the liquid of two liquid chambers of B does not flow mutually, because the control valve the inside is equipped with Returnning spring, this moment, control valve was in closed condition. when the lower piston arm of this hydraulic type shock strut obtains shaking force that an external world makes progress, promoting lower piston upwards slides, liquid in the following cylinder barrel is squeezed and promotes the control valve unlatching, and at this moment the flow direction B liquid chamber of A liquid chamber promotes upper piston, upper piston promotes the upper piston arm, promote the pillar spring again, after the pillar spring is compressed, store and the absorption portion energy; This moment, the pillar spring began to discharge. before release, because the effect of control valve, fluid passage is closed, at this moment, the liquid of B liquid chamber can only flow to the A liquid chamber downwards by the fluid passage of damping taphole on position shelf from control valve lentamente, and the liquid of A liquid chamber is squeezed, promote lower piston and lower piston arm again, get back to original state of rest, played cushioning effect, improved the travelling comfort of vehicle and handling.

Four, description of drawings

Fig. 1 is the utility model piston state of rest structural representation;

Fig. 2 upwards slides structural representation for the utility model piston;

Fig. 3 slides structural representation downwards for the utility model piston;

Fig. 4 is the utility model control valve 5 structure for amplifying schematic representation;

Among the figure: the last cylinder barrel 18-spring fixed cover 19-liquid of oil sealing 4-lower piston 5-control valve (forming) the last oil sealing 8-upper piston arm 9-pillar spring 10-cylinder barrel sealing gasket 11A liquid chamber 12-B liquid chamber 13-crash pad 14-erosion control card 15-liquid feeding mouth 16-exhaust nozzle 17-of 6-upper piston 7-under the cylinder barrel 2-lower piston arm 3-under the 1-by position shelf-5a, sealing gasket-5b, control valve plate-5c, damping taphole-5d, Returnning spring-5e, fluid passage-5f

Five, embodiment

Contrast drawings and Examples below, further specify the general technical structure characteristic of the utility model hydraulic type shock strut.

A kind of new type hydraulic formula shock strut includes down cylinder barrel 1, lower piston arm 2, following oil sealing 3, lower piston 4, control valve 5 (being made up of position shelf 5a, sealing gasket 5b, control valve plate 5c, damping taphole 5d, Returnning spring 5e, fluid passage 5f), upper piston 6, goes up oil sealing 7, upper piston arm 8, pillar spring 9, cylinder barrel sealing gasket 10, A liquid chamber 11, B liquid chamber 12, crash pad 13, erosion control card 14, liquid feeding mouth 15, exhaust nozzle 16, goes up cylinder barrel 17, spring fixed cover 18, liquid 19.It is characterized in that: designed two cover oil hydraulic cylinders up and down, promptly descended cylinder barrel 1 and last cylinder barrel 17, following cylinder barrel 1 is a "T"-shaped cylinder body; In descending cylinder barrel 1, control valve 5 is being housed, following cylinder barrel 1 is isolated into A liquid chamber 11 and B liquid chamber 12, and the diameter of B liquid chamber 12 is being bigger than the diameter of A liquid chamber 11, and full of liquid 19.As energy transfer and damping medium, control opening and closing of control valve 5 with liquid 19, reach the transmission vibration energy by the last current downflow of liquid 19, and the slow release of vibration energy.It is characterised in that: lower piston 4 and lower piston arm 2 are equipped with in the lower end at following cylinder barrel 1, and crash pad 13 is housed on the lower piston 4, and following cylinder barrel 1 lower end is with down oil sealing 3; Upper piston 6 and upper piston arm 8 are housed in the last cylinder barrel 17, the upper end of last cylinder barrel 17 is with oil sealing 7, be with pillar spring 9 on the upper piston arm 8, pillar spring 9 peripheries are equipped with spring fixed cover 18 on last cylinder barrel 17, in last cylinder barrel 17 both sides liquid feeding mouth 15 and exhaust nozzle 16 are housed, and be communicated with B liquid chamber 12, cylinder barrel sealing gasket 10 is installed in down between cylinder barrel 1 and the last cylinder barrel 17; Its feature also is: erosion control card 14 is equipped with on the top at following cylinder barrel 1, and control valve 5 is housed on erosion control card 14.

In Fig. 1 embodiment, the last lower piston of whole shock strut remains static, and upper piston 6 and lower piston 4 do not slide up and down mutually, and control valve 5 is in closed condition.

In Fig. 2 embodiment, control valve plate in last lower piston and the control valve is in upwards sliding state. when the lower piston arm 2 of this hydraulic type shock strut obtains shaking force that an external world makes progress, promoting lower piston 4 upwards slides, liquid 19 in the following cylinder barrel 1 is squeezed, this moment, liquid 19 promoted the control valve plate 5c slide-open that makes progress by the fluid passage 5f in the control valve 5, at this moment the liquid 19 of A liquid chamber 11 flows to B liquid chamber 12 by fluid passage 5f, the liquid of B liquid chamber 12 is squeezed and promotes upper piston 6, upper piston 6 promotes upper piston arm 8, promoting pillar spring 9 more upwards slides, after pillar spring 9 is compressed, store and the absorption portion energy; Pillar spring 9 begins to discharge at this moment.

In Fig. 3 embodiment, the control valve plate in last lower piston and the control valve is in downward sliding state.After pillar spring 9 is compressed, store and the absorption portion energy, pillar spring 9 begins to stretch at this moment, releases energy; Before release, because the effect of the Returnning spring 5e in the control valve 5, the controlled valve plate 5c of fluid passage 5f closes rapidly, the liquid of B liquid chamber 12 can only flow to A liquid chamber 11 downwards lentamente from the fluid passage 5f of damping taphole 5d on position shelf 5a on the control valve plate 5c, the liquid 19 of A liquid chamber 11 is squeezed, promote lower piston 4 and lower piston arm 2, the state of rest of getting back to Fig. 1 has played damping and support function.

In Fig. 4 embodiment, control valve 5 is in closed condition, and 5c is equipped with Returnning spring 5e on the control valve plate, and having damping taphole 5d, control valve plate 5c is equipped with sealing antivibration pad 5b in the bottom, has refilled position shelf 5a, have fluid passage 5f on its position shelf 5a, and corresponding with damping taphole 5d.

In the accompanying drawings, erosion control card 14 and crash pad 13 be for cylinder barrel leakage liquid and designing for a certain reason, and liquid feeding mouth 15 and exhaust nozzle 16 are being manufactured and used during maintenance, are in closed state at ordinary times.Arrow among Fig. 2, Fig. 3 is the flow direction of liquid 19.

Claims

1. hydraulic type shock strut, include down cylinder barrel (1), lower piston arm (2), following oil sealing (3), lower piston (4), control valve (5)---form by the shockproof sealing gasket of position shelf (5a) (5b) control valve plate (5c) damping taphole (5d) Returnning spring (5e) fluid passage (5f), upper piston (6), last oil sealing (7), upper piston arm (8), pillar spring (9), cylinder barrel sealing gasket (10), A liquid chamber (11), B liquid chamber (12), crash pad (13), erosion control card (14), liquid feeding mouth (15), exhaust nozzle (16), last cylinder barrel (17), spring fixed cover (18), liquid (19), it is characterized in that: designed two cover oil hydraulic cylinders up and down, promptly descend cylinder barrel (1) and last cylinder barrel (17), and cylinder barrel (1) is a "T"-shaped cylinder body down, in the cylinder barrel (1) control valve (5) is being housed down, following cylinder barrel (1) is isolated into A liquid chamber (11) and B liquid chamber (12), and the diameter of B liquid chamber (12) is bigger than the diameter of A liquid chamber (11), and full of liquid (19); Upper piston arm (8) is one " m " shape.

2. according to the described hydraulic type shock strut of claim 1, it is characterized in that: lower piston (4) and lower piston arm (2) are equipped with in the lower end at following cylinder barrel (1), crash pad (13) is housed on the lower piston (4), following cylinder barrel (1) lower end is with down oil sealing (3), upper piston (6) and upper piston arm (8) are housed in the last cylinder barrel (17), the upper end of last cylinder barrel (17) is with oil sealing (7), be with pillar spring (9) on the upper piston arm (8), pillar spring (9) periphery is equipped with spring fixed cover (18) on last cylinder barrel (17), in last cylinder barrel (17) both sides liquid feeding mouth (15) and exhaust nozzle (16) are housed, and be communicated with B liquid chamber (12), cylinder barrel sealing gasket (10) is installed in down between cylinder barrel (1) and the last cylinder barrel (17).

3. according to claim 1 or 2 described hydraulic type shock struts, it is characterized in that: on the control valve plate (5c) in the control valve (5) pressure spring (5e) is housed, and have a damping taphole (5d), shockproof sealing gasket (5b) is equipped with in control valve plate (5c) bottom, refilled position shelf (5a), have fluid passage (5f) on its position shelf (5a), and corresponding with damping taphole (5d).

4. according to claim 1 or 2 described hydraulic type shock struts, it is characterized in that: erosion control card (14) is equipped with at the middle part at following cylinder barrel (1), and control valve (5) is housed on erosion control card (14).