CN2640907Y

CN2640907Y - Concealed hydraulic damper

Info

Publication number: CN2640907Y
Application number: CN 02263454
Authority: CN
Inventors: 陆杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-29
Filing date: 2002-07-29
Publication date: 2004-09-15
Anticipated expiration: 2012-07-29

Abstract

The utility model relates to a concealed hydraulic pressure shock absorber, essentially characterized in that the oil cylinder which is arranged and connected on the upper connecting groupware is externally connected with a shock absorbing column; one end of the shock absorbing drum which is connected with the lower connecting groupware is provided with an oil and dust proof cover; the lip of one end of the oil and dust proof cover is sealed on the shock absorbing column; both ends of a buffer spring which is arranged in the shock absorbing drum are respectively connected with the base of the shock absorbing column and the end face of the shock absorbing column; the places which are near to the end parts of the shock absorbing drum and the shock absorbing column are respectively provided with an outer guiding cover and a mouth guiding cover; a piston pole which is connected on the upper and the lower connecting pieces is provided with a buffer seat; the piston pole gets through a framework oil seal, an inner guiding cover which has guiding function to the piston pole and a return buffer spring, and is connected with a small spring, a valve sheet, a piston sheet and a piston in sequence. The utility model has neat appearance and simple structure, greatly reducing the premature damage of the oil seal caused by the horizontal cutting force of the piston pole to the sealing piece, reducing the oil leakage of the shock absorber, and improving the using capacity and service life of the shock absorber.

Description

Concealed liquid damper

Technical field

The utility model relates to a kind of liquid damper of self-propelled vehicle, especially relates to a kind of concealed liquid damper that is used for motor bike.

Background technology

Present disclosed motorcycle hydraulic bumper is decay a impact endurance test shock in the vehicle ' process of flow of liquid is produced when aperture in elastic buffer by spring and the oil cylinder damping.Owing to type frequently reciprocating between piston rod and the outside framework oil seal, be subjected to the influence of road conditions again, in the vehicle ' process so bumper is in than bad working environment.General liquid damper only relies on the orienting sleeve of piston rod and cylinder body to play guiding and position-limiting action at bumper in telescopic process, to such an extent as to cross shear concentrates on locating of piston rod and cylinder body, therefore make the piston rod axially reciprocating after stressed extremely unstable, and the cross shear of piston rod causes outside framework oil seal to wear and tear too early, cause fluid to reveal, the attenuation function of bumper is descended, influence the in-use performance and the service life of bumper.On the other hand, the recoil spring of liquid damper is outlet structure, though the bumper that has is provided with dust boot in the outside of recoil spring, the profile of bumper is untidy.

Goal of the invention

It is reliable that technical problem to be solved in the utility model provides a kind of in-use performance, can improve service life, and the clean and tidy concealed liquid damper of profile.

The technical scheme that the utility model will solve the problems of the technologies described above is: a kind of concealed liquid damper, it is characterized in that: the oil cylinder outside that is installed on the coupling assembling also is connected with shock structure, with following coupling assembling bonded assembly damping cylinder one end the oil resistant dust boot is housed, and the lip seal of oil resistant dust boot one end is on shock structure; Place its two ends of recoil spring in the damping cylinder to be connected with the end face of shock structure base and shock structure respectively, be respectively equipped with outer guide sleeve and openings lead cover in end near damping cylinder and shock structure; The piston rod that is connected down on the attaching parts is equipped with buffing pad, and piston rod passes in-oil cylinder outside framework oil seal, interior orienting sleeve that piston rod is play the guiding role, restore recoil spring, and is connected with little spring, valve block, piston sheet and piston in turn.

After the utility model is implemented technique scheme: 1, owing between damping cylinder and shock structure, position guiding by orienting sleeve, it is simple in structure, make bumper suffered cross shear major part in telescopic process be transferred to damping cylinder and shock structure part, therefore reduced the cross shear between piston rod and the oil cylinder greatly, make the stability of piston rod axially reciprocating better, avoided in the piston rod telescopic process causing phenomenon to the outside framework oil seal early failure because of cross shear, therefore can reduce the bumper oil leakage phenomenon significantly, improve the in-use performance and the service life of bumper.2, be built-in structure in the damping cylinder owing to recoil spring is arranged on, make whole bumper outward appearance clean and tidy, attractive in appearance.3, damping cylinder and shock structure adopt oil resistant dust boot hermetically-sealed construction, can prevent effectively that dust from entering in the damping cylinder, to guarantee orienting sleeve damping cylinder and shock-absorbing sleeve are positioned guiding.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an another kind of structural representation of the present utility model.

Fig. 3 is that the A-A of Fig. 1 and Fig. 2 analyses and observe local structure for amplifying scheme drawing.

Fig. 4 is the sectional structure scheme drawing of coupling assembling under Fig. 2.

The specific embodiment

As Fig. 1,2 described concealed liquid damper, be connected with last coupling assembling 1 by the oil cylinder 3 of base and cylinder body captive joint, shock structure 2 is arranged on the outside of oil cylinder 3, and is fixedly connected on the base.Last coupling assembling 1 shown in Fig. 1,3 is made up of upper lift ring 1-1, axle sleeve 1-2 and lining ring 1-3, and upper lift ring 1-1 is threaded on the base of oil cylinder 3.The damping cylinder 16 that is made of cylindrical shell and cylinder base is connected with following coupling assembling 17 by piston rod 14, and lock by jam nut, following coupling assembling 17 as shown in Figure 1 is made of lower lift ring 17-1, lining ring 17-2 and axle sleeve 17-3, and this structure matches with riding-type motorcycle; Perhaps the following coupling assembling shown in Fig. 2,4 17 is the lower fork assembly, and the lower fork assembly is made of lower fork 17-4, the nut 17-5 that is fixed on the threaded backing plate 17-6 of lower fork 17-4 one side and is fixed on lower fork 17-4 bottom, and this structure matches with pedal motorcycle.One oil resistant dust boot 4 is connected on the damping cylinder 16, and the lip seal of oil resistant dust boot 4 one ends is on shock structure 2, and this oil resistant dust boot 4 is the oil resistant dust boot of lips or many lips, makes it have anti-dust performance preferably.Place recoil spring 8 its two ends in the damping cylinder 16 to be connected with the end face of oil cylinder 3 bottoms and shock structure 2 respectively, be respectively equipped with outer guide sleeve 6 and openings lead cover 7 in end near damping cylinder 16 and shock structure 2, outer guide sleeve 6 is made by abrasion resistant metal or non-metallic material, and outer guide sleeve 6 is T shape cover, and its shaft shoulder is arranged in the circumferential recess of damping cylinder 16, and spacing by the back-up ring 5 that is connected in damping cylinder 16 circumferential recess, make outer guide sleeve 7 reciprocating with damping cylinder 16.Openings lead cover 7 is also made by abrasion resistant metal or non-metallic material, the circumferential bulge loop and the circumferential recess on the shock structure 2 of openings lead cover 7 are spacing, reciprocating with shock structure 2, by the orienting sleeve between damping cylinder 16 and the shock structure 2, most cross shear is transferred to damping cylinder 16 and shock structure 2 places, significantly reduce the cross shear of 14 pairs of outside framework oil seals 13 of piston rod, reduced the oil leakage phenomenon of bumper, improved the in-use performance of bumper.See shown in Fig. 1～3, the piston rod 14 that is connected down on the coupling assembling 17 has pair oil cylinder 3 bottoms to play the buffing pad 15 of buffer action, and the interior orienting sleeve 11 and the recoil spring 10 that resets that piston rod 14 passes outside framework oil seal 13 in the oil cylinder 2, piston rod 14 is play the guiding role, and the little spring 18 that valve block 19 opens and closes is controlled in connection successively, valve block 19, piston sheet 20 and piston 9, to decay by the mobile of fluid, for ease of processing and reduction manufacturing cost, a valve block seat 21 is housed between piston rod 14 and the little spring 18.For keeping the sealing property of piston rod 14, interior orienting sleeve 12 also is provided with and piston rod 14 leak free O-ring seals 11.

When bumper was in compression stroke in the utility model work, shock structure 2 and oil cylinder 3 moved downwards, and compression recoil spring 8, and at this moment, the fluid in the upper oil cavitie is washed valve block 19 open, and fluid enters lower oil cavitie fast from piston 9 and piston sheet 20; When bumper is in extension stroke, recoil spring 8 is upheld and is resetted, shock structure 2 and upwards operation of oil cylinder 3, the recoil spring 8 that resets withstands little spring 18, valve block 19 is closed under the elastic force effect of little spring 18, at this moment, a small amount of fluid in the lower oil cavitie slowly flows into upper oil cavitie from piston 9 and cylinder body preset clearance, realizes the damping vibration attenuation buffer action.

Claims

1, a kind of concealed liquid damper, it is characterized in that: oil cylinder (3) outside that is installed on the coupling assembling (1) also is connected with shock structure (2), with following coupling assembling (17) bonded assembly damping cylinder (16) one end oil resistant dust boot (4) is housed, and the lip seal of oil resistant dust boot (4) one ends is on shock structure (2); Place its two ends of recoil spring (8) in the damping cylinder (16) to be connected with the end face of shock structure (16) base and shock structure (2) respectively, be respectively equipped with outer guide sleeve (6) and openings lead cover (7) in end near damping cylinder (16) and shock structure (2); The piston rod (14) that is connected down on the attaching parts (17) is equipped with buffing pad (15), and the interior orienting sleeve (12) that piston rod (14) passes outside framework oil seal (13) in the oil cylinder (3), play the guiding role to piston rod (14), restore recoil spring (10), and be connected with little spring (18), valve block (19), piston sheet (20) and piston (9) in turn.

2, concealed liquid damper according to claim 1, it is characterized in that: the described outer guide sleeve of being made by high-abrasive material (6) is T shape cover, and its shaft shoulder is arranged in the groove of damping cylinder (16), and spacing by the back-up ring (5) that is connected in damping cylinder (16) groove.

3, concealed liquid damper according to claim 1 is characterized in that: described openings lead cover (7) is made by high-abrasive material, and the groove of the circumferential bulge loop of openings lead cover (7) and shock structure (2) endoporus is spacing.

4, concealed liquid damper according to claim 1 is characterized in that: orienting sleeve (13) is provided with and piston rod (14) leak free O-ring seals (11) in described.

5, concealed liquid damper according to claim 1 is characterized in that: the oil resistant dust boot of described oil resistant dust boot (4) tool and lips mouth.