CN2751178Y

CN2751178Y - Piston structure of oil buffer

Info

Publication number: CN2751178Y
Application number: CN 200420007274
Authority: CN
Inventors: 洪聪源
Original assignee: WANDERFUL CO Ltd
Current assignee: WANDERFUL CO Ltd
Priority date: 2004-03-19
Filing date: 2004-03-19
Publication date: 2006-01-11
Anticipated expiration: 2014-03-19

Abstract

The utility model relates to a piston structure of an oil buffer. The outer wall of the piston structure of an oil buffer is concavely provided with a ring embedding groove for the embedment of an O-shaped ring, and the center of a piston is provided with a rod penetrating hole for the insertion and the penetration of a perforating section at the inner end of a piston rod; a sheet sheathing section of which the diameter is larger than the perforating section is prearranged above the piston rod, and the sheet sheathing section can be sheathed with a throttle sheet of which the center is provided with a section sheathing hole; in addition, the upper end surface of the piston is concavely provided with a sheet containing groove, and both sides of the perforating section are respectively provided with a small flow guide hole and a big flow guide hole; the upper end and the lower end of the small flow guide hole are respectively provided with an upper groove and a lower groove; by the bottom surface of the throttle sheet which can be lifted up and lowered down and the adoption of the structure that a fluid path is sealed by a plane surface, the flow direction of fluid inside an oil buffer can be accurately controlled and the efficacy of the oil buffer can be greatly increased to be in conformity with the industrial availabiliy.

Description

The piston structure of hydraulic buffer

Technical field

The utility model is relevant for a kind of piston structure of hydraulic buffer.

Background technique

The hydraulic buffer of present stage (seeing also Fig. 1) is made up of oil pipe 1, piston 2, piston rod 3, Bearing 4, oil sealing 5 and oil sealing base 6; Wherein, capel groove 22 (seeing also Fig. 1-1) to provide O shape ring 21 to embed is provided the outer wall of piston 2, establishing one in the center of piston 2 provides piston rod the 3 inner pole perforating holes 23 that pass through of inserting, and pole perforating hole 23 2 sides are established respectively to hold pearl alcove 24 and water conservancy diversion alcove 25, and hold pearl alcove 24 and be respectively equipped with big pod apertures 241 and little pod apertures 251 with Oil Guide alcove 25 bottoms, other holds pearl alcove 24 can be ccontaining for steel ball 26.

When being mounted on the commonly using piston 2 and move up of hydraulic buffer oil pipe 1 inside (seeing also Fig. 2), the fluid that is positioned at piston 2 tops can flow to piston 2 belows via water conservancy diversion alcove 25 and little pod apertures 251; If, the fluid that is positioned at piston 2 tops is desired to flow to piston 2 belows via holding pearl alcove 24, then can promote steel ball 26 and make it to shift to appearance pearl alcove 24 bottoms, and then seal big pod apertures 241 tops, cause fluid to desire to flow to the constricted flow of piston 2 belows via appearance pearl alcove 24, big pod apertures 241;

In addition when being mounted on the commonly using piston 2 and move down of hydraulic buffer oil pipe 1 inside (seeing also Fig. 3), be positioned at the fluid of piston 2 belows, can flow to piston 2 tops via little pod apertures 251, water conservancy diversion alcove 25 and big pod apertures 241, appearance pearl alcove 24 respectively; Wherein, via big pod apertures 241, hold the upwards fluid of channelling of pearl alcove 24, steel ball 26 can be pushed away and hold pearl alcove 24 bottoms, and then open big pod apertures 241 tops, cause the mobile smooth and easy without hindrance of fluid.

But, the spherical steel ball 26 of commonly using piston 2 inside is annular wire with big contacting of pod apertures 241 upper limbs, when the surface of steel ball 26 concavo-convex because of making improper generation, the upper limb of perhaps big pod apertures 241 is non-to be positive bowlder, very easily produce the drawback of escape of liquid, then the accurate control flows direction of flow of piston 2 causes the effect forfeiture of hydraulic buffer.

Summary of the invention

The purpose of this utility model is to provide a kind of accurately control flows direction of flow, makes the piston structure of the hydraulic buffer that the effect of hydraulic buffer significantly promotes.

For achieving the above object, the utility model adopts following design proposal: a kind of piston structure of hydraulic buffer, its outer wall are arranged with the capel groove that provides O shape ring to embed, and the center of piston is established one and provided the inner perforated section of piston rod to insert the pole perforating hole that passes through; It is characterized in that: the perforated section top of piston rod, a default diameter is greater than the cover fragment of perforated section, this cover fragment has the throttle sheet fit of segment opening for the center, the upper-end surface of piston is arranged with a sheet-hold groove in addition, and perforated section two sides of piston are established respectively with little pod apertures and big pod apertures, and the upper and lower end of its little pod apertures is established above groove respectively and reached groove down; The structure of planar surface encloses fluid path is adopted in the throttle sheet bottom surface.

During throttle sheet bottom surface applying sheet-hold groove bottom, the area of throttle sheet can seal the bore of big pod apertures, and the last notch footpath of little pod apertures, the area of throttle sheet is not then all with its sealing.

The cover fragment external diameter of piston rod is slightly less than the segment opening internal diameter of throttle sheet, and then the throttle sheet lifting is displaced into cover fragment outside.

The beneficial effects of the utility model: the piston structure of the utility model hydraulic buffer, it uses throttle sheet bottom surface applying sheet-hold groove bottom, cause the area of throttle sheet to seal the bore of big pod apertures, but the structure characteristic that the last notch footpath of little pod apertures is not all sealed, can improve and commonly use piston and use annular wire sealing fluid path, be easy to generate the drawback of escape of liquid; The utility model piston is adopted the structure of planar surface encloses fluid path by the bottom surface of liftable throttle sheet, and accurately the direction of flow of control piston upper and lower causes the effect of hydraulic buffer significantly to be promoted, to meet industry applications.

Description of drawings

Fig. 1: commonly use the sectional view that piston set is located at hydraulic buffer inside:

Fig. 1-1: the component decomposition map of commonly using piston;

Fig. 2: the fluid of commonly using the piston rising moves schematic representation;

Fig. 3: the fluid of commonly using piston decline moves schematic representation;

Fig. 4: the utility model piston set is located at the sectional view of hydraulic buffer inside;

Fig. 4-1: the component decomposition map of the utility model piston;

Fig. 5: the fluid that the utility model piston rises moves schematic representation;

Fig. 6: the fluid that the utility model piston descends moves schematic representation.

Embodiment

The piston 2a of the utility model hydraulic buffer (seeing also Fig. 4 and Fig. 4-1), its outer wall is arranged with so that the O shape ring capel groove 2a2 that 2a1 embeds to be provided, and the center of piston 2a establishes one provides piston rod 3 inner perforated sections 31 to insert the pole perforating hole 2a3 that passes through, and perforated section 31 tops of piston rod 3, a default diameter is greater than the cover fragment 32 of perforated section 31, this cover fragment 32 can have throttle sheet 33 fits of segment opening 331 for the center, the upper-end surface of piston 2a is arranged with a sheet-hold groove 2a4 in addition, and pole perforating hole 2a3 two sides of piston 2a are established respectively with little pod apertures 2a5 and big pod apertures 2a6, on the little pod apertures 2a5 of tool, the lower end is established above groove 2a51 respectively and is reached groove 2a52 down.

When the utility model piston 2a that is mounted on hydraulic buffer oil pipe 1 inside moves up (seeing also Fig. 5), the fluid that is positioned at piston 2a top can flow to piston 2a below via last groove 2a51, little pod apertures 2a5 and following groove 2a52; If, the fluid that is positioned at piston 2a top is desired to flow to piston 2a below via big pod apertures 2a6, then can promote throttle sheet 33 descends, its throttle sheet 33 bottom surfaces are with applying sheet-hold groove 2a4 bottom, then the area of throttle sheet 33 can seal the bore of big pod apertures 2a6, causes fluid to desire to flow to via big pod apertures 2a6 the constricted flow of piston 2a below;

When the utility model piston 2 that is mounted on hydraulic buffer oil pipe 1 inside moves down (seeing also Fig. 6), be positioned at the fluid of piston 2a below in addition, can flow to piston 2a top via little pod apertures 2a5 and big pod apertures 2a6 respectively; Wherein, upwards the fluid of channelling can push away throttle sheet 33 bottom surfaces sheet-hold groove 2a4 bottom, and then opens the bore of big pod apertures 241, causes the mobile smooth and easy without hindrance of fluid.

The piston 2a of the utility model hydraulic buffer, its structure characteristic is used throttle sheet 33 bottom surface applying sheet-hold groove 2a4 bottom, cause the area of throttle sheet 33 to seal the bore of big pod apertures 2a6, but the structure characteristic that the last groove 2a51 bore of little pod apertures 2a5 does not all seal, can improve and commonly use piston 2 and use annular wire sealing fluid path, be easy to generate the drawback of escape of liquid; The utility model piston 2 is adopted the structure of planar surface encloses fluid path by the bottom surface of liftable throttle sheet 33, and accurately the direction of flow of control piston 2a upper and lower causes the effect of hydraulic buffer significantly to be promoted, to meet industry applications.

Only the above only is a preferred embodiment of the present utility model, when can not with qualification scope of the present utility model.Promptly the equalization of being done according to the utility model claim generally changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1, a kind of piston structure of hydraulic buffer, its outer wall are arranged with the capel groove that provides O shape ring to embed, and the center of piston is established one and provided the inner perforated section of piston rod to insert the pole perforating hole that passes through;

It is characterized in that:

The perforated section top of piston rod, a default diameter is greater than the cover fragment of perforated section, this cover fragment has the throttle sheet fit of segment opening for the center, the upper-end surface of piston is arranged with a sheet-hold groove in addition, and perforated section two sides of piston are established respectively with little pod apertures and big pod apertures, and the upper and lower end of its little pod apertures is established above groove respectively and reached groove down;

The structure of planar surface encloses fluid path is adopted in the throttle sheet bottom surface.

2, the piston structure of hydraulic buffer according to claim 1, it is characterized in that: the cover fragment external diameter of piston rod is slightly less than the segment opening internal diameter of throttle sheet, and then the throttle sheet lifting is displaced into cover fragment outside.