CN2283149Y

CN2283149Y - Adjustable hydraulic damper

Info

Publication number: CN2283149Y
Application number: CN 97211487
Authority: CN
Inventors: 郑育兴; 陈福恭
Original assignee: JUXING CO Ltd LEQING CITY
Current assignee: JUXING CO Ltd LEQING CITY
Priority date: 1997-02-28
Filing date: 1997-02-28
Publication date: 1998-06-03
Anticipated expiration: 2007-02-28

Abstract

The utility model relates to an adjustable hydraulic damper, which comprises an outer oil cylinder, a damping oil cylinder which is separated by pistons and an oil return oil cylinder. One-way valves are arranged both between the piston and the outer oil cylinder, and between the piston and the oil return oil cylinder; a channel is arranged between the damping oil cylinder and the outer oil cylinder, and the damping of the channel is adjustable; a radial seal ring is arranged on a piston rod; a partition wall which partitions the damping oil cylinder is arranged on one side direction of the radial seal ring; the central hole is movably matched with the piston rod; a low pressure cavity is formed between the partition wall and the radial seal ring; an overflow hole is communicated with the outer oil cylinder; the hydraulic oil which flows into the low pressure cavity from the damping oil cylinder via a movable match clearance belongs to the low pressure. The sealing condition of the seal ring is improved, and the sealing performance is enabled to be more reliable.

Description

The adjustable hydraulic damper

The utility model relates to a kind of adjustable hydraulic damper.

Be provided with adjustable damp channel of linking up inner cylinder and outer oil cylinder in the adjustable hydraulic damper, when placing inner cylinder and inner cylinder being separated under the effect of piston at piston pulling rod of damping oil cylinder and oil return oil cylinder when mobile, hydraulic oil will be by damp channel oil cylinder outside damping oil cylinder flows to lentamente, at this moment, hydraulic oil in the damping oil cylinder will be set up high pressure, this high pressure oil blocks moving of piston on the one hand, also directly act on the other hand piston pulling rod is implemented on the radial direction seal ring of motive sealing, in order to improve the sealability of this radial direction seal ring, increase its power of wrapping though be provided with pressure spring in its side to piston pulling rod, but this radial direction seal ring directly is subjected to the effect of high pressure oil after all, makes that herein sealing is ineffective easily and causes leakage of oil.

The purpose of this utility model provides the more reliable adjustable hydraulic damper of a kind of sealability.

Solution of the present utility model is the laterally disposed next door that together damping oil cylinder is cut off at radial direction seal ring, the center hole in this next door with piston pulling rod movingly, and next door is with forming low-pressure cavity between the radial direction seal ring, and this low-pressure cavity is provided with the overflow hole with outer oil cylinder communication.

The hydraulic oil of having set up high pressure in damping oil cylinder does not directly act on radial direction seal ring because of being intercepted by the next door in the adjustable hydraulic damper of said structure, and reduced to low pressure oil with the hydraulic oil that the gap movingly between the center hole of next door flows into low-pressure cavity by piston pulling rod, and flowed into outer oil cylinder through overflow hole, hydraulic oil can not set up high pressure in low-pressure cavity in other words, so just improved the air-proof condition of radial direction seal ring, its sealability is also just more reliable.

Further illustrate detailed content of the present utility model below in conjunction with drawings and Examples.

Fig. 1; The utility model embodiment one structural drawing;

Fig. 2: A-A sectional view;

Fig. 3: the utility model embodiment two part-structure figure;

Fig. 4: B-B sectional view.

The adjustable hydraulic damper has the inner cylinder of concentric setting and outer oil cylinder 1 and is arranged on piston 2 and piston pulling rod 3 in the inner cylinder, piston 2 is separated into damping oil cylinder 4 and oil return oil cylinder 5 with inner cylinder, and be provided with one-way valve 6 with the guiding of the hydraulic oil in the oil return oil cylinder 5 damping oil cylinder 4, outer oil cylinder 1 is with the one-way valve 7 that also is provided with between the oil return oil cylinder 5 guiding of the hydraulic oil in the outer oil cylinder 1 oil return oil cylinder 5, the opposite side of damping oil cylinder 4 be provided with damping cover 8 and with damping cover 8 on set communication damping oil cylinder 4 with outside the damping engage sleeves 10 of damp channel 9 cappings of oil cylinder 2, and driving mechanism is regulated in the damping with driving

damping cover

8 or 10 rotations of damping engage sleeves, piston pulling rod 3 is provided with radial direction seal ring 11, the side direction of this radial direction seal ring 11 is provided with pressure spring 28 and compression spring 13, the utility model is in the laterally disposed next door 14 that together damping oil cylinder 4 is cut off of radial direction seal ring 11, the center hole in this next door 14 with piston pulling rod 3 movingly, and next door 14 is with forming low-pressure cavity 15 between the radial direction seal ring 10, and this low-pressure cavity 15 is provided with the overflow hole 16 with outer oil cylinder 1 communication.Above-mentioned damp channel 9 is degree of depth from dark to shallow circular groove, can be arranged on the end face of damping cover 8, also can be arranged on the circumferential of damping cover 8, in embodiment one, damp channel 9 is circumferentially to be provided with, and damping cover 8 is a rotating component of being regulated drive mechanism by damping, next door 14 and overflow hole 16 all are arranged on the damping cover 8, damping engage sleeves 10 is moving part not, be fixed on the

cylinder sleeve

17,18 of inner cylinder and outer oil cylinder 1, which is provided with the

oil outlet

19,20 of linking up with damp channel 9 and overflow hole 16 respectively.If with damping engage sleeves 10 is rotating component, be embodiment two, present embodiment is arranged on next door 14 on the damping cover 8, and overflow hole 16 is arranged on the damping engage sleeves 10, the low pressure oil that flows out from damp channel 9 and overflow hole 16 with flow path damping cover 8 with oil cylinder 1 outside the inflow of the passage between the cylinder sleeve 18 of outer oil cylinder 1.It is a kind of universal design that driving mechanism is regulated in described damping, by the radial drive part and axially actuator form, in embodiment one and embodiment two, the radial drive part comprises operating sleeve 21 and is located at two slit bamboo or chopped wood Houghs 22 between the operating sleeve 21 coaxial actuators.Axially actuator is radially to mesh, overlap 8 stuffing box glands 12 that axially mesh, interior dress radial direction seal ring 11 with damping with Hough 22 in embodiment one; Axially actuator is the damping engage sleeves 10 that radially meshes with Hough 22, interior dress radial direction seal ring 11 in embodiment two.For rapid operation, embodiment one also is provided with plane ball bearing 23,24 between rotating component is with fixed block.The same with known hydraulic damper, be provided with buffer stopper 25 and draw ring 26 at the head of piston pulling rod, also be provided with draw ring 27 in the end of cylinder sleeve 18.

Claims

1, a kind of adjustable hydraulic damper, have the inner cylinder of concentric setting and outer oil cylinder and be arranged on piston and piston pulling rod in the inner cylinder, piston is separated into damping oil cylinder and oil return oil cylinder with inner cylinder, and be provided with one-way valve with the guiding of the hydraulic oil in oil return oil cylinder damping oil cylinder, outer oil cylinder is with the one-way valve that also is provided with between the oil return oil cylinder the guiding of the hydraulic oil in outer oil cylinder oil return oil cylinder, the opposite side of damping oil cylinder be provided with the damping cover and damping put set communication damping oil cylinder with outside the damping engage sleeves of damp channel capping of oil cylinder, and driving mechanism is regulated in the damping with driving damping cover or the rotation of damping engage sleeves, piston pulling rod is provided with radial direction seal ring, the side direction of this radial direction seal ring is provided with pressure spring and compression spring, it is characterized in that: in the laterally disposed next door (14) that together damping oil cylinder (4) is cut off of radial direction seal ring (11), the same piston pulling rod of center hole (3) in this next door (14) movingly, and forming low-pressure cavity (15) between the same radial direction seal ring of next door (14) (10), this low-pressure cavity (15) is provided with the overflow hole (16) of linking up with outer oil cylinder (1).