CN201198853Y - Buffering device of automobile hanging cylinder - Google Patents

Abstract

The utility model relates to an automobile suspension cylinder buffer device which belongs to the field of hydraulic pumps; the buffer device is characterized in that hydraulic oil is filled in the upper part of a piston; dry nitrogen is filled on the oil layer of the hydraulic oil; annular space which is formed by the surrounding of the piston, the inner wall of a cylinder and the outer wall of a piston rod is also filled with the hydraulic oil; the piston rod is provided with at least four radial buffer oil holes, wherein, a ball check valve is respectively arranged in two symmetrical buffer oil holes; the piston, the inner wall of the cylinder and the outer wall of the piston rod arranged to form annular space, thus the hydraulic oil is discharged and supplemented mainly by the holes of the piston rod, and the size and the number of the holes can control the speed of the reciprocating flow of the hydraulic oil, thereby forming damping force; the damping force consumes certain energy, thus achieving the effect of bidirectional buffer. The buffer device has the advantages of simple and compact structure, and convenient use.

Description

Automobile hanging cylinder damping device

One, technical field

The utility model relates to a kind of automobile hanging cylinder damping device, belongs to the oil hydraulic pump field.

Two, background technique

The damping device of selling in the market and using has parabolic shape, groove milling type, step type, cone type, two-stage buffering type and porous cylinder barrel type etc., and its mechanism all more complicated, cost of production is higher.Shock-absorbing capacity is poor, has reduced the damping performance of suspension cylinder.Particularly when vehicle is unloaded, the car body amplitude that jolts is big, and run smoothness is poor, and the travelling speed of vehicle and conveying efficiency are subjected to very big restriction.

Three, summary of the invention

It is a kind of simple in structure, compact that the purpose of this utility model is to provide, the automobile hanging cylinder damping device that shock-absorbing capacity is good.

Technological scheme is: hydraulic oil is equipped with on the utility model piston top, be filled with dry nitrogen above the oil reservoir of hydraulic oil, piston and inner wall of cylinder and piston rod outer wall surround an annulus, also be full of hydraulic oil in the space, piston rod is provided with at least four and radially cushions oilhole, wherein in two symmetrical buffering oilholes non-return valve is housed.

The utility model wherein is equipped with non-return valve in two symmetrical buffering oilholes owing to be provided with a plurality of oilholes that radially cushion on piston rod.And piston and inner wall of cylinder and piston rod outer wall surround an annulus, so the discharge of hydraulic oil and replenish mainly by the overcurrent aperture on the piston rod, the size of aperture and number are being controlled the speed that hydraulic oil back and forth flows, and produce certain damping function.This damping function can consume certain energy, plays the effect of a bidirectional buffering.The utility model is simple in structure, compact, and is easy to use.

Four, description of drawings

Fig. 1 is the utility model structural representation.

Five, embodiment

Be with piston 4 on the utility model piston rod 2, hydraulic oil 5 is equipped with on piston 4 tops, be filled with dry nitrogen 6 above the oil reservoir of hydraulic oil 5, piston 4 surrounds an annulus with cylinder barrel 2 inwalls and piston rod 1 outer wall, also be full of hydraulic oil 5 in the space, establish 4 to 6 on the piston rod 1 and radially cushion oilhole 7, in two symmetry buffering oilholes 7 therein non-return valve 3 is housed.

The utility model is when work, when running into, vehicle falls when winnowing with a dustpan, during piston rod 1 stressed stretching out, outwards motion under the promotion of compressed nitrogen, the hydraulic oil in the annulus that piston 4 and cylinder barrel 2 inwalls and piston rod 1 outer wall surround, enter the inner chamber of piston rod 1 as passage by a plurality of radially damping oilholes 7 on the piston rod 1, because the area of passage of damping oilhole 7 is little, flow velocity is bigger, and damping function is stronger, delay resilience, realized buffer function.When the stressed retraction cylinder barrel 2 of piston rod 1, piston rod 1 has compressed the nitrogen 6 in the cylinder, in the cylinder hydraulic oil 5 by damping oilhole 7 and one-way valve 3 as flow channels, enter piston 4 and surround an annulus with cylinder barrel 2 inwalls and piston rod 1 outer wall, damping function reduces relatively, mainly utilize the nonlinear elasticity characteristic of gas to play buffer function this moment, thereby reduce the travel speed of piston rod.

Claims (1)

1. automobile hanging cylinder damping device, comprise piston rod (1), cylinder barrel (2), one-way valve (3), piston (4), it is characterized in that: be with piston (4) on the piston rod (1), hydraulic oil (5) is equipped with on piston (4) top, be filled with dry nitrogen (6) above the oil reservoir of hydraulic oil (5), piston (4) surrounds an annulus with cylinder barrel (2) inwall and piston rod (1) outer wall, also be full of hydraulic oil (5) in the space, at least be provided with four on the piston rod (1) and radially cushion oilhole (7), in two symmetrical buffering oilholes (7) non-return valve (3) is housed therein.