CN207122540U - Pull-type damping buffer - Google Patents

Abstract

The utility model provides a kind of pull-type damping buffer, including oil cylinder, is full of hydraulic oil in oil cylinder, oil cylinder built with piston component and piston rod, wherein, piston component includes support column and damping ring；Support column includes first connecting portion and second connecting portion, and the inwall of first connecting portion is provided with oil groove, and the upper end of second connecting portion is provided through through hole, and piston rod is fixed and is set in second connecting portion；Damping ring is arranged on the piston rod, first annular convex edge and the second annular convex edge are provided with the periphery wall of damping ring, gap between damping ring and piston rod is more than the gap between the second annular convex edge and oil cylinder, and annular chamfer is provided between the periphery wall of the second annular convex edge and the bottom wall of the second annular convex edge；Retractable member is additionally provided with oil cylinder.Damping buffer of the present utility model, it is pulled outwardly piston rod and plays a part of damping buffering, buffering effect is stable, service life length.

Description

Pull-type damping buffer

Technical field

It the utility model is related to a kind of buffer, especially a kind of pull-type damping buffer on door or drawer.

Background technology

Door or drawer etc. are during opening and closing to two extreme positions often due to inertia is excessive, speed, easily Hand is crushed, human body is caused to damage, in some places to need peace and quiet, people also produce without hope there is when opening and closing door and window, drawer Raw noise, it is another should avoid noise occasion be cinema's interior folding seat use.Therefore, often door and window, drawer or Inertia when installing a damping buffer in folding seat to reduce closing simultaneously slows down its speed, prevents from crushing or the production of noise It is raw.

Existing isolation damper is a kind of hydraulic damper, and isolation damper includes oil cylinder, in the seal assembly of oil cylinder Cavity in be provided with piston component and the piston rod through seal assembly both sides, one end connection of the piston rod in cavity There is piston component；In the cavity of oil cylinder, air bag or cavernous body are further fixedly arranged between piston component and seal assembly.

Piston component includes connecting pole and damping ring, and damping ring is made up of hard material, damping ring and oil cylinder inner wall interference Coordinate, the oil circuit with certain path length and a cross-sectional area size, oil communication piston group are provided with damping ring The both sides of part.

Because oil cylinder is full of hydraulic oil in seal assembly, after the inside cavity of oil cylinder is reached in piston rod, due to oil The cumulative volume of cylinder interior is constant, and stretching into for piston rod, needs the contraction of air bag or cavernous body to be put down with the pressure in holding chamber body Weighing apparatus, therefore the hydraulic oil below piston component is then reached at air bag or cavernous body by oil circuit, and to air bag or cavernous body Extruded, and then complete the adjustment of oil pressure process inside oil cylinder.Because the section of oil circuit has been controlled with length to the flow of oil System, therefore the speed that pushes of piston rod is restricted, and forms damping buffering effect.

However, existing damping buffer is all pushing-type damping buffer, i.e., when piston rod is promoted into oil cylinder, damping is slow Rush device and just play a part of damping buffering, lack pull-type damping buffer, different installation requirements can not be met.In addition, use Air bag or cavernous body carry out the adjustment of the oil pressure inside oil cylinder, bubble easily occur, largely effect on the damping effect of damping buffer Fruit, and the service life of air bag or cavernous body is short, reduces the Acceptable life of damping buffer.

The content of the invention

The purpose of this utility model is to provide a kind of stable pull-type damping buffer of damping.

To achieve these goals, pull-type damping buffer provided by the invention, including oil cylinder, in the axial direction, oil The first end of cylinder is provided with the first seal assembly, and the second end of oil cylinder is provided with the second seal assembly, is full of liquid in oil cylinder Force feed, oil cylinder pass built with piston component and piston rod, the first end of piston rod from the centre of the first seal assembly, piston rod The second end fix be set on piston component, wherein, piston component includes support column and damping ring；Support column includes first and connected Socket part and second connecting portion, the internal diameter of first connecting portion are more than the internal diameter of second connecting portion, and the upper end of first connecting portion has The screens of annular, the inwall of first connecting portion be provided with oil groove, and oil groove connects upper end and the second connecting portion of first connecting portion Upper end, the upper end of second connecting portion are provided through through hole in the junction of the inwall with first connecting portion, and piston rod is solid Surely it is set in second connecting portion, the outer wall of support column and the inwall of oil cylinder are interference fitted；The internal diameter of damping ring is more than piston rod Diameter, damping ring is arranged on the piston rod, and first annular convex edge and the second annular convex edge are provided with the periphery wall of damping ring, The external diameter of first annular convex edge is more than the external diameter of the second annular convex edge, and the external diameter of first annular convex edge is less than the internal diameter of oil cylinder, resistance Gap between Buddhist nun's ring and piston rod is more than the gap between the second annular convex edge and oil cylinder, and the second annular convex edge is arranged on first In connecting portion, the external diameter of the second annular convex edge is more than the internal diameter of first connecting portion, the periphery wall of the second annular convex edge and the second ring Annular chamfer is provided between the bottom wall of shape convex edge；Retractable member is additionally provided with oil cylinder.

Further scheme is that the first seal assembly includes back-up ring and oil seal washer, and back-up ring is connected in oil cylinder, and oil seal washer is supported It is connected on back-up ring, oil seal washer is sealed in the first end of oil cylinder；On the axial direction of oil seal washer, oil seal washer includes one from oil The first end of seal is to the inner ring of the reduced diameter at the second end of oil seal washer, and the first end of oil seal washer is towards the first of oil cylinder End, the second end of oil seal washer is towards the second end of oil cylinder, and piston rod is passed through from inner ring, and piston rod is matched somebody with somebody with inner ring interference Close.

Further scheme is that the second seal assembly includes O-ring seals and sealing ring mounting seat, O-ring seal set It is located in sealing ring mounting seat, the inwall interference fit of O-ring seals and oil cylinder, the second end of oil cylinder is additionally provided with back-up ring, Retractable member is spring, and the first end of spring is connected in sealing ring mounting seat, and the second end of spring is connected on back-up ring.

The beneficial effects of the utility model are to apply outside pulling force to piston rod, and piston rod drives piston component upward Mobile, receiving space more than oil cylinder inner carrier component reduces, and hydraulic oil applies downward pressure to damping ring so that damping ring Bottom be tightly attached to support column second connecting portion upper end, the hydraulic oil above piston component passes sequentially through damping Oil groove in first portion of company in gap, support column between the first annular convex edge of ring and the inwall of oil cylinder, the second of support column Entered after through hole on connecting portion in the receiving space below piston component, the direction that flows through of above-mentioned hydraulic oil forms the first oil Road, due to the gap very little between the first annular convex edge of damping ring and the inwall of oil cylinder, the diameter of oil groove also very little, so liquid Force feed flows through that the resistance that is subject to during the first oil circuit is very big, and for piston rod during pulling out, damping of the present utility model is slow Rush device and play good cushioning effect.During offsetting piston rod pull-out, the partial volume of piston rod reduction, compressed Spring elongation, sealing ring mounting seat moves up, so that in-oil cylinder cumulative volume is constant, maintains in-oil cylinder pressure to put down Weighing apparatus, and do not allow to be also easy to produce bubble in oil cylinder, the buffering effect of damping buffer will not be had an impact, service life is longer.

Brief description of the drawings

Fig. 1 is the structure chart of the pull-type damping buffer embodiment of the utility model.

Fig. 2 is that the pull-type damping buffer embodiment of the utility model hides the structure chart after oil cylinder.

Fig. 3 is the structure chart of the support column of the pull-type damping buffer embodiment of the utility model.

Fig. 4 is the sectional view of the pull-type damping buffer embodiment of the utility model in the first operative state.

Fig. 5 is the schematic enlarged-scale view of part A in Fig. 4.

Fig. 6 is the sectional view of the pull-type damping buffer embodiment of the utility model in a second operative state.

Fig. 7 is the schematic enlarged-scale view of part B in Fig. 6.

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Embodiment

Referring to Fig. 1, Fig. 1 is the structure chart of the pull-type damping buffer embodiment of the utility model.It is provided by the utility model Pull-type damping buffer has an oil cylinder 1, and oil cylinder 1 has a cylindrical housing, is full of hydraulic oil in oil cylinder.This implementation The damping buffer of example can also sliding axially along oil cylinder 1 to the piston rod 2 overhang, piston rod 2 from oil cylinder with one.

Referring to Fig. 2, Fig. 2 is that the pull-type damping buffer embodiment of the utility model hides the structure chart after oil cylinder.In oil cylinder 1 The first seal assembly 3, the seal assembly 5 of piston component 4 and second are provided with, wherein, in the axial direction, the first seal assembly 3 It is arranged on the first end of oil cylinder 1, the second seal assembly 5 is arranged on the second end of oil cylinder 1, and the first end of piston rod 2 is from The centre of one seal assembly 4 is passed, and the second end of piston rod 2, which is fixed, to be set on piston component 4.First seal assembly 3 includes The back-up ring 31 to adjoin each other and oil seal washer 32, oil seal washer 32 are connected on back-up ring 31.Piston component 4 includes support column 41 and damping Ring 42.Second seal assembly 5 includes O-ring seals 51, sealing ring mounting seat 52 and back-up ring 53, and O-ring seal 51 is set in close In seal mounting seat 52, the inwall of O-ring seals 51 and oil cylinder 1 is interference fitted, and is set between sealing ring mounting seat 52 and back-up ring 53 Spring 54 is equipped with, the first end of spring 54 is connected in sealing ring mounting seat 52, and the second end of spring 54 is connected on back-up ring 54, Spring 54 is in compressive state.

Referring to Fig. 3, Fig. 3 is the structure chart of the support column of the pull-type damping buffer embodiment of the utility model.Support column 41 Including first connecting portion 410 and second connecting portion 420, the internal diameter of first connecting portion 410 is more than the internal diameter of second connecting portion 420, The upper end of first connecting portion 410 has the screens 411 of annular, and the inwall of first connecting portion 410 is provided with oil groove 412, oil groove 412 Connect the upper end of first connecting portion 410 and the upper end of second connecting portion 420, the upper end of second connecting portion 420 is with the The junction of the inwall of one connecting portion 410 is provided through through hole 421, and piston rod 2 is fixed and is set in second connecting portion 420, The outer wall of support column 420 is provided with annular protrusion 422, and the inwall of annular protrusion 422 and oil cylinder 1 is interference fitted.Oil groove 412 and logical Hole 421 forms oil circuit.

Referring to Fig. 4 and Fig. 5, Fig. 4 is the pull-type damping buffer embodiment of the utility model cuing open in the first operative state View, Fig. 5 are the schematic enlarged-scale views of part A in Fig. 4.In the first operative state, external force F1 applies along direction as shown to piston rod 2 Add pulling force.

Oil seal washer 32 is sealed in the first end of oil cylinder 1, and on the axial direction of oil seal washer 32, oil seal washer 32 includes one From the first end of oil seal washer 32 to the inner ring 320 of the reduced diameter at the second end of oil seal washer 32, the first end of oil seal washer 32 Towards the first end of oil cylinder 1, the second end of oil seal washer 32 towards oil cylinder 1 the second end, it is interior on the direction shown in Fig. 4 The diameter of circle 320 is from top to bottom gradually reduced, and piston rod 2 is passed through from inner ring 320, and piston rod 2 is matched somebody with somebody with the interference of inner ring 320 Close.The sealing of the first end to oil cylinder 1 is realized in oil seal washer 32, prevents the hydraulic oil in oil cylinder 1 from being leaked from first end.

The internal diameter of damping ring 42 is more than the diameter of piston rod 2, and damping ring 42 is set on piston rod 2, outside damping ring 42 The first annular annular convex edge 440 of convex edge 430 and second is provided with perisporium, the external diameter of first annular convex edge 430 is more than the second ring The external diameter of shape convex edge 440, the external diameter of first annular convex edge 430 are less than the internal diameter of oil cylinder 1, first annular convex edge 430 and oil cylinder 1 it Between gap it is smaller, form very narrow oil circuit between first annular convex edge 430 and the inwall of oil cylinder 1.Second annular convex edge 440 It is arranged in the first connecting portion 410 of support column 41, the second annular convex edge 440 can move up and down in first connecting portion 410.The The external diameter of second ring convex edge 440 is more than the internal diameter of first connecting portion 410, the periphery wall of the second annular convex edge 440 and the second annular Annular chamfer 441 is provided between the bottom wall of convex edge 440.

Apply outside pulling force F1 to piston rod 2, piston rod 2 drives piston component 4 to move up, the inner carrier group of oil cylinder 1 The receiving space of part more than 4 reduces, and hydraulic oil applies downward pressure to damping ring 42 so that the bottom of damping ring 42 is tightly Ground is attached to the upper end of the second connecting portion 420 of support column 41, and the hydraulic oil of the top of piston component 4 passes sequentially through damping ring 42 Oil groove 412 in first portion of company 410 in gap, support column 41 between first annular convex edge 420 and the inwall of oil cylinder 1（Referring to Fig. 3）, support column 41 second connecting portion 420 on through hole 421 after enter in the receiving space of the lower section of piston component 4, it is above-mentioned The direction that flows through of hydraulic oil forms the first oil circuit 100, due to damping ring 42 first annular convex edge 420 and oil cylinder 1 inwall it Between gap very little, the diameter of oil groove 412 also very little is living so to flow through the resistance being subject to during the first oil circuit 100 very big for hydraulic oil For stopper rod 2 during pulling out, damping buffer of the present utility model plays good cushioning effect.In order to offset piston During bar 2 pulls out, the partial volume of the reduction of piston rod 2, the spring 54 compressed extends, and sealing ring mounting seat 52 is to moving up It is dynamic, so that the cumulative volume in oil cylinder 1 is constant, maintain the pressure balance in oil cylinder 1.

Referring to Fig. 6 and Fig. 7, Fig. 6 is the pull-type damping buffer embodiment of the utility model cuing open in a second operative state View, Fig. 7 are the schematic enlarged-scale views of part B in Fig. 6.In a second operative state, external force F2 applies along direction as shown to piston rod 2 Add thrust.Apply inside thrust F2 to piston rod 2, piston rod 2 drives piston component 4 to move down, the inner carrier component of oil cylinder 1 Less than 4 receiving space reduces, and hydraulic oil applies upward thrust to damping ring 42 so that the bottom of damping ring 42 is from being attached to The position of the upper end of the second connecting portion 420 of support column 41 separates, the screens 411 in the first connecting portion 410 of support column 41 Limitation damping ring 42 departs from from support column 41, the shape between the bottom of damping ring 42 and the upper end of second connecting portion 420 Into larger gap, the hydraulic oil of the lower section of piston component 4 pass sequentially through through hole 421 in the second connecting portion 420 of support column 41, The gap between gap, damping ring 42 and piston rod 2 between the bottom of damping ring 42 and the upper end of second connecting portion 420 The receiving space of the top of piston component 4 is entered afterwards, and the direction that flows through of above-mentioned hydraulic oil forms the second oil circuit 200, due to damping Between gap between ring 42 and piston rod 2 is much larger than between the first annular convex edge 420 of damping ring 42 and the inwall of oil cylinder 1 Gap, and first of the gap between the bottom of damping ring 42 and the upper end of second connecting portion 420 much larger than support column 41 connects The diameter of oil groove 412 in portion 410, so hydraulic oil flows through the resistance ratios being subject to during the second oil circuit 200 when flowing through the first oil circuit 100 Much smaller, piston rod 2 is very easy in inside propulsion, namely the reset of damping buffer of the present utility model is simple, is not required to Take very big strength.During offsetting the push-in of piston rod 2, the increase partial volume of piston rod 2, spring 54 is pressed Contracting, sealing ring mounting seat 52 moves down, so that the cumulative volume in oil cylinder 1 is constant, maintains the pressure balance in oil cylinder 1.

It should be noted that in the utility model, the upper and lower position relation of each part of damping buffer is relative For when diagrammatically shown damping buffer is placed vertically, not to its absolute limitation, when damping buffer is laterally put When putting, the position relationship of each part should be expressed as left and right position relationship.

Finally it is emphasized that the foregoing is only preferred embodiment of the present utility model, this reality is not limited to With new, for those skilled in the art, the utility model can have various change and change, for example, in oil cylinder The combination of spring and the second seal assembly is replaced using air bag or cavernous body as retractable member.It is all in essence of the present utility model God and principle within, any modification, equivalent substitution and improvements done etc., should be included in the scope of protection of the utility model it It is interior.

Claims (3)

1. pull-type damping buffer, including oil cylinder, in the axial direction, the first end of the oil cylinder are provided with the first sealing group Part, the second end of the oil cylinder are provided with the second seal assembly, are full of hydraulic oil in the oil cylinder, the oil cylinder is built with work Plug assembly and piston rod, the first end of the piston rod pass from the centre of first seal assembly, and the of the piston rod Two ends are fixed and are set on the piston component, it is characterised in that：

The piston component includes support column and damping ring；

The support column includes first connecting portion and second connecting portion, and the internal diameter of the first connecting portion is more than the described second connection The internal diameter in portion, the upper end of the first connecting portion have the screens of annular, and the inwall of the first connecting portion is provided with oil groove, institute State oil groove and connect the upper end of the first connecting portion and the upper end of the second connecting portion, the upper end of the second connecting portion The through hole that portion is provided through in the junction of the inwall with the first connecting portion, the piston rod, which is fixed, is set in described the On two connecting portions, the inwall of the outer wall of the support column and the oil cylinder is interference fitted；

The internal diameter of the damping ring is more than the diameter of the piston rod, and the damping ring is set on the piston rod, the resistance First annular convex edge and the second annular convex edge are provided with the periphery wall of Buddhist nun's ring, the external diameter of the first annular convex edge is more than described The external diameter of second annular convex edge, the external diameter of the first annular convex edge are less than the internal diameter of the oil cylinder, the damping ring with it is described Gap between piston rod is more than the gap between second annular convex edge and the oil cylinder, and second annular convex edge is set In the first connecting portion, the external diameter of second annular convex edge is more than the internal diameter of the first connecting portion, second ring Annular chamfer is provided between the periphery wall of shape convex edge and the bottom wall of second annular convex edge；

Retractable member is additionally provided with the oil cylinder.

2. pull-type damping buffer according to claim 1, it is characterised in that：

First seal assembly includes back-up ring and oil seal washer, and the back-up ring is connected in the oil cylinder, and the oil seal washer abuts On the back-up ring, the oil seal washer is sealed in the first end of the oil cylinder；

On the axial direction of the oil seal washer, the oil seal washer includes a first end from the oil seal washer to the oil sealing The inner ring of the reduced diameter at the second end of circle, the first end of the oil seal washer towards the oil cylinder first end, it is described Second end of oil seal washer is towards the second end of the oil cylinder, and the piston rod passes through from the inner ring, and the piston rod It is interference fitted with the inner ring.

3. pull-type damping buffer according to claim 1, it is characterised in that：

Second seal assembly includes O-ring seals and sealing ring mounting seat, and the O-ring seal is set in the sealing ring In mounting seat, the inwall of the O-ring seals and the oil cylinder is interference fitted, and the second end of the oil cylinder is additionally provided with gear Circle, the retractable member is spring, and the first end of the spring is connected in the sealing ring mounting seat, the of the spring Two ends are connected on the back-up ring.