CN2590766Y - Combined shock absorber valve - Google Patents

Abstract

The utility model relates to a combined type shock absorber valve. The utility model comprises an outer shell body and a valve core body (7) arranged in an inner cavity of the outer shell body. The utility model is characterized in that the inner part of a hollow hole of the valve core body (7) is provided with a one-way valve composed of a valve seat (10), a valve ball (9), a spring (8), and a spring seat (5) by hollow fastening screw nuts; the valve core body (7) around the hollow hole is at least provided with two damper valves (11) communicating an upper and a lower valve cavities. The combined type shock absorber valve of the utility model is mainly used for an oil gas hanging shock absorber mechanism of a motor vehicle. By the function of the combined type shock absorber valve, the rapid retraction and the flexible extension of a piston rod of a single-action hydraulic cylinder (a suspension cylinder) in the oil gas hanging shock absorber mechanism can be ensured, and accordingly, the piston rod can be effectively prevented from bending and damaging under the action of external force impact. Simultaneously, the utility model can rapidly eliminate repeat oscillation among oil gas elastic mediums, so that the whole system can rapidly trend to a steady state.

Description

The compound type damped valve

(1) technical field

The utility model relates to a kind of power actuated vehicle shock absorption device, particularly a kind of compound type damped valve of using in the engineering machinery vehicle oleo-pneumatic suspension mechanism of being suitable for.

(2) background technology

As everyone knows, be provided with shock absorption device on the automobile, modal be between vehicle bridge and vehicle frame the mounting spring steel plate as shock absorption device.And the car weight of construction machinery and equipment is generally all big than automobile, usually at tens tons to tens tons weights, the road surface is uneven and the vibration that causes is not very very big to driver's driver behavior influence when they travel at a slow speed, so at present most of products of construction machinery and equipment all only rely on the elastic shock-absorbing device between operator's compartment and the vehicle frame or the shock absorption device of driver's seat to eliminate the influence of road vibration to the driver, do not use shockproof suspension mechanism.Along with the development of society, the moving velocity of construction machinery and equipment more and more receives publicity.In order to improve construction machinery and equipment fast reserve ability, accelerate transfer velocity, later-model construction machinery and equipment has all improved moving velocity, but for construction machinery and equipment, when speed per hour surpasses 40km/h, when especially reaching 50-55km/h, if do not take suitable glissando, the road surface is uneven and jolting of causing will make the driver be difficult to carry out the pulsation-free driver behavior.And for the construction machinery and equipment of tens tons of car weights, if adopt the shock absorption device of spring plate when travelling, the scantling of structure of this device will design very hugely undoubtedly, and this is difficult to again realize on overall dimension is arranged.Secondly, spring plate bears and pitches all rightly, but should not bear transverse load.Turn to owing to be subjected to the restriction in operation place, construction machinery and equipment often to be designed to pivotally connected frame, so that reduce turn radius as far as possible.But rapid minor-circle turn can produce very big transverse load again, and this will make the spring plate shock absorption device damage easily.Moreover, for construction machinery and equipments such as wheel dozer, loaders, often needing while walking operation, therefore need when operation, suspended shock absorbing mechanism be locked again, so that maximum tractive force or the digging force of mechanical energy performance.If adopt spring plate as shock absorption device, to its design latch-up structure, this will be again very difficult again.

At above-mentioned weak point of the prior art, the applicant of present patent application once was called " oleo-pneumatic suspension mechanism " utility model patent to Patent Office of the People's Republic of China's submission and in after this obtaining the Patent right patent No. for " 00232541.1 ", name in December, 2000.This utility model patent discloses a kind of oleo-pneumatic suspension mechanism that can be locked again when playing cushioning effect, operation when construction machinery and equipment is run at high speed that is applicable to.

(3) summary of the invention

The purpose of this utility model provides a kind of compound type damped valve that is specially adapted to oleo-pneumatic suspension mechanism just on the basis of above-mentioned patented technology.

The purpose of this utility model can realize by following measure:

Compound type damped valve of the present utility model comprise body skin and be arranged in the body skin inner chamber the spool body, by hollow clamp nut the check valve of being made up of valve seat, valve ball, spring, spring perch is installed in the middle through hole of wherein said spool body; At the dash pot valve that is provided with lower valve chamber in two connections on the spool body around middle through hole at least.

Body skin described in the utility model is made up of the upper and lower casing of mutual fastening, and its two end faces that cooperatively interacts combines by sealing member; Described spring perch is a T font structure; Around the dash pot valve that is provided with lower valve chamber in three connections on the spool body of middle through hole in uniform mode.

The quantity of the dash pot valve that is provided with equal mode for cloth on the body of spool described in the utility model can be according to the needs design of different power actuated vehicle types, and the aperture of dash pot valve and length also can manufacture and design the group for different size.Combined transformation by check valve and different size dash pot valve test like this can be determined the optimum technology parameter to damped valve in a certain type power actuated vehicle oleo-pneumatic suspension mechanism very soon.

Principle of work of the present utility model is as follows:

When vehicle ', running into high protruding road surface, fluid in the single-action hydraulic cylinder pressure chamber in the oleo-pneumatic suspension mechanism is under the effect of external force, the pressure that overcomes the check valve medi-spring is opened check valve, make fluid in the cylinder pressure chamber flow to the shoe cream room of accumulator rapidly by check valve and dash pot valve, make the piston rod of single-action hydraulic cylinder get the at high speed retraction, make vehicle frame held stationary state; When vehicle ', running into the depression road surface, the piston rod out-draw that the sinking of wheel will drive single-action hydraulic cylinder long (the instantaneous ground reaction force that loses of rod end of the single-action hydraulic cylinder that this moment and drive axle link together), meanwhile, hydraulic oil in the accumulator refluxes to accumulator by pipeline under the effect of high-pressure inert gas, because the check valve under this state is in blocking under the effect of cut-back pressure, the hydraulic oil that enters damped valve can only be by the soft pressure chamber that charges into single-action hydraulic cylinder of dash pot valve, promoting piston rod slowly stretches out, make and the soft kiss the earth of piston rod bonded assembly drive axle wheel energy, make vehicle frame still be in plateau, thereby guaranteed driver and conductor's driver comfort.

Compound type damped valve of the present utility model is mainly used in the oleo-pneumatic suspension damper mechanism of power actuated vehicle, effect by this compound type damped valve, the piston rod that can guarantee the single-action hydraulic cylinder (hanging oil cylinder) in the oleo-pneumatic suspension damper mechanism rapidly withdrawal or flexibility stretches out, thereby can effectively avoid piston rod to be subjected to curved under the effect of external impacts and damage; Simultaneously it can eliminate the vibration back and forth between the oil gas elastic medium again rapidly, makes the total system state that tends to be steady very soon.

(4) description of drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is the be hit by a bullet front view of spring abutment of Fig. 1.

Fig. 3 is the lateral plan of Fig. 2.

1 is upper shell among the figure, the 2nd, and sealing member, the 3rd, lower house, the 4th, hollow clamp nut, the 5th, spring perch, the 6th, packing ring, the 7th, spool body, the 8th, spring, the 9th, valve ball, the 10th, valve seat, the 11st, dash pot valve, the 12nd, spool body snap ring, the 13rd, jam nut, the interface of M for being connected with the single-action hydraulic cylinder pressure chamber, the interface of N for being connected with accumulator.

Fig. 4 is the oleo-pneumatic suspension mechanism principle figure that has the utility model compound type damped valve.

14 is cylinder barrels of hydraulic ram among the figure, the 15th, and piston, the 16th, piston rod, the 17th, cylinder end orienting sleeve, the 18th, electromagnetic valve, the 19th, compound type damped valve, the 20th, the check valve in the compound type damped valve, the 21st, the dash pot valve in the compound type damped valve, the 22nd, accumulator, the 23rd, shutoff valve, the 24th, oil pump, the 25th, safety valve, the 26th, oil filter, the 27th, fuel tank.

(5) specific embodiment

The utility model is done with detailed description below with reference to embodiment (accompanying drawing):

As shown in Figure 1, compound type damped valve of the present utility model comprises body skin and is installed in spool body 7 in the body skin inner chamber by snap ring 12, by hollow clamp nut 4 check valve of being made up of valve seat 10, valve ball 9, spring 8, packing ring 6, spring perch 5 is installed in the middle through hole of wherein said spool body 7, be installed with jam nut 13 on hollow clamp nut 4, wherein said spring perch 5 is a T font structure (shown in Figure 3 as Fig. 2); Be provided with the dash pot valve 11 of lower valve chamber in three connections on around the spool body 7 of middle through hole in uniform mode; Body skin described in the utility model is by forming by thread connecting mode spinning upper and lower casing 1 and 3 together, and its two end faces that cooperatively interacts combines by sealing member 2.

As shown in Figure 4, the single-acting hydraulic ram of being made up of cylinder barrel 14, piston 15, piston rod 16, the cylinder end orienting sleeve 17 of hydraulic ram among the figure is suspended on the frame by oscillating bearing by the A point, is connected with other member by oscillating bearing by the B point; Electromagnetic valve 18 is to be used for the control element of locking oleo-pneumatic suspension mechanism, when electromagnetic valve switches to position, a diagram left side, and the oil circuit cut-out between cylinder barrel 14 and the accumulator 22; When electromagnetic valve switched to the right position of diagram, the oil circuit between cylinder barrel 14 and the accumulator 22 was connected (being filled with the unreactable gas through the regulation initial pressure that calculates in the air cavity of accumulator).At this moment, by compound type damped valve of the present utility model to the gentle trickle charge functional oil of the quick oil extraction of single-acting hydraulic ram, under accumulator 22 combineds action, both can make the oil gas in the accumulator 22 play the elastic medium effect, for running at high speed of power actuated vehicle provides good cushioning effect, can play the decay shock damping action to the vibration of fluid between single-acting hydraulic ram and accumulator again, make the oil piping system of the oleo-pneumatic suspension mechanism of power actuated vehicle be tending towards tranquil fast.

Claims (4)

1, a kind of compound type damped valve, it comprise body skin and be arranged in the body skin inner chamber spool body (7), it is characterized in that: by hollow clamp nut (4) check valve of being made up of valve seat (10), valve ball (9), spring (8), spring perch (5) is installed in the middle through hole of described spool body (7); At least be provided with the dash pot valve (11) of lower valve chamber in two connections on the spool body (7) around middle through hole.

2, compound type damped valve according to claim 1 is characterized in that: the spool body (7) around middle through hole is gone up the dash pot valve (11) that is provided with lower valve chamber in three connections in uniform mode.

3, compound type damped valve according to claim 1 is characterized in that: described body skin is made up of upper and lower casing (1), (3) of mutual fastening, and its two end faces that cooperatively interacts combines by sealing member (2).

4, compound type damped valve according to claim 1 is characterized in that: described spring perch (5) is a T font structure.

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