CN102278407A

CN102278407A - Controllable air spring

Info

Publication number: CN102278407A
Application number: CN2011101364302A
Authority: CN
Inventors: 桂万水
Original assignee: JIANGDU MINGRUI GAS SPRING MANUFACTURING CO LTD
Current assignee: JIANGDU MINGRUI GAS SPRING MANUFACTURING CO LTD
Priority date: 2011-05-25
Filing date: 2011-05-25
Publication date: 2011-12-14

Abstract

The invention discloses a controllable air spring, and relates to a structure of an air spring. The controllable air spring comprises a cylinder barrel, a piston, a hollow piston rod and a valve needle; the hollow piston rod outside the piston is radially provided with a first through hole; a first sealing element is arranged between the piston and the hollow piston rod; the rear end in the piston is radially provided with a first groove; a riveting gasket is arranged in the first groove; the valve needle outside the hollow piston rod is provided with a limiting step; a second annular groove is radially formed outside the rear end of the hollow piston rod; two arc-shaped clamping rings are arranged in the first groove between the hollow piston rod and the piston, and two arc-shaped clamping rings are arranged in the second groove respectively; a third groove communicated with the first through hole is formed in the rear end of the hollow piston rod; a second sealing element, a lining ring and a third sealing element are sequentially arranged between the hollow piston rod in the third groove and the valve needle from front and back; the lining ring is radially provided with a second through hole; and the third sealing element is arranged at the front side of the riveting gasket. According to the controllable air spring, the machining difficulty is reduced.

Description

A kind of controllable type air spring

Technical field

The present invention relates to the field of a kind of spring, vibration damper, damping device, particularly the structure of air spring.

Background technique

Air spring is a kind ofly can play support, buffering, braking, highly regulate and the accessory of function such as angle adjustment, is widely used in fields such as medical equipment, automobile, furniture, Weaving device, machine-building.Principle is to charge into inert gas or gas mixture in airtight cylinder barrel, make the pressure in the cavity be higher than atmospheric several times or tens times, thereby the pressure difference that the cross-section area that utilizes piston rod produces less than the cross-section area of piston realize the motion of piston rod.At present, the controllable type air spring adopts the press mode of closing in of piston (controlled valve) and piston rod to be connected, and its needle forward end seal is made in the piston rod, and back-end sealing (locking place) is made on the piston, to the requirement of concentricity, make piston and piston rod need higher processing precision during the needle action.Secondly former process using fixedly needle back-end sealing (locking place) of piston Upper gasket that presses earlier; Again with the rod seal assembly that assembles (generally forming) with bride visits her parents with her husband for the first time after the wedding that bar (needle operation push rod) presses with it again is integral by pad and O shape circle.Its process step is many, inefficiency.

Summary of the invention

The objective of the invention is in order to overcome the deficiencies in the prior art, a kind of controllable type air spring that reduces difficulty of processing is provided.

The object of the present invention is achieved like this: a kind of controllable type air spring, comprise cylinder barrel, piston, box type piston bar and needle, piston is arranged in the cylinder barrel, the rear end of box type piston bar is set in the piston, on the box type piston bar outside the piston first through hole is set radially, between piston and the box type piston bar first Sealing is set, rear end in the piston radially is provided with first groove, the pad that presses is set in first groove, the pad that presses is arranged on the rear side of box type piston bar, described needle is set in the box type piston bar and presses in the pad, on the needle outside the box type piston bar limited step is set, limited step is arranged on the rear side of the pad that presses, the rear end outer radial of described box type piston bar is provided with annular second groove, two arc collars are set in first groove between box type piston bar and the piston, and two arc collars are separately positioned in second groove; The 3rd groove that is connected with first through hole is set in the rear end of described box type piston bar, set gradually second Sealing, lining ring and the 3rd Sealing from front to back between box type piston bar in the 3rd groove and the needle, second through hole that is connected with the 3rd groove radially is set on the lining ring, and the 3rd Sealing is arranged on the front side of the pad that presses.

The present invention all accomplishes the sealing of needle in the piston rod by above design, to improve concentricity, reduces difficulty of processing; And realize the fixing of piston and piston rod by collar, saved the step part that stretches out with the closing in of piston rod riveting on the former piston, can also save in the cylinder barrel and take up room, extrusion increases, identical stroke is materials still less, can effectively save material, reduce cost.Make into once to press by former twice riveting on the technology, can save the closing-in mould that presses, make operation more simple and convenient effectively.

In first groove between box type piston bar and the piston liner is set also, liner is arranged on the arc collar and presses between the pad.

Description of drawings

Fig. 1 is the structural representation of needle of the present invention in locked position.

Fig. 2 is the structural representation of needle of the present invention in the enable possition.

Among the figure, 1 cylinder barrel, 2 box type piston bars, 3 second Sealings, 4 lining rings, 5 the 3rd grooves, 6 second through holes, 7 first through holes, 8 first Sealings, 9 arc collars, 10 second grooves, 11 liners, 12 pads that press, 13 limited steps, 14 the 3rd Sealings, 15 first grooves, 16 pistons, 17 needles, 18 bride visits her parents with her husband for the first time after the wedding bars.

Embodiment

As shown in Figure 1, 2, be a kind of controllable type air spring, comprise cylinder barrel 1, piston 16, box type piston bar 2, needle 17 and bride visits her parents with her husband for the first time after the wedding bar 18, piston 16 is arranged in the cylinder barrel 1, the rear end of box type piston bar 2 is set in the piston 16, needle 17 and bride visits her parents with her husband for the first time after the wedding that bar 18 is set in respectively in the box type piston bar 2, the front side of bride visits her parents with her husband for the first time after the wedding bar 18 is arranged on needle 17.

First Sealing 8 is set between piston 16 and the box type piston bar 2, rear end in the piston 16 radially is provided with first groove 15, the rear end outer radial of box type piston bar 2 is provided with annular second groove 10, two arc collars 9 and a liner 11 are set in first groove 15 between box type piston bar 2 and the piston 16, two arc collars 9 are separately positioned in second groove 10, and liner 11 is arranged on the rear side of arc collar 9.On the box type piston bar 2 outside the piston 16 first through hole 7 is set radially, the 3rd groove 5 that is connected with first through hole 7 is set in the rear end of box type piston bar 2, set gradually second Sealing 3, lining ring 4 and the 3rd Sealing 14 from front to back between box type piston bar 2 in the 3rd groove 5 and the needle 17, second through hole 6 that is connected with the 3rd groove 5 radially is set on the lining ring 4.

The pad 12 that presses also is set in first groove 15 between box type piston bar 2 and the piston 16, and the pad 12 that presses is nested with outside needle 17, and the pad 12 that presses is arranged on the rear side of the 3rd Sealing 14, box type piston bar 2, liner 11.On the needle 17 outside the box type piston bar 2 limited step 13 is set, limited step 13 is arranged on the rear side of the pad 12 that presses.

Claims

1. controllable type air spring, comprise cylinder barrel, piston, box type piston bar and needle, piston is arranged in the cylinder barrel, the rear end of box type piston bar is set in the piston, on the box type piston bar outside the piston first through hole is set radially, between piston and the box type piston bar first Sealing is set, rear end in the piston radially is provided with first groove, the pad that presses is set in first groove, the pad that presses is arranged on the rear side of box type piston bar, described needle is set in the box type piston bar and presses in the pad, on the needle outside the box type piston bar limited step is set, limited step is arranged on the rear side of the pad that presses, and it is characterized in that: the rear end outer radial of described box type piston bar is provided with annular second groove, two arc collars are set in first groove between box type piston bar and the piston, and two arc collars are separately positioned in second groove; The 3rd groove that is connected with first through hole is set in the rear end of described box type piston bar, set gradually second Sealing, lining ring and the 3rd Sealing from front to back between box type piston bar in the 3rd groove and the needle, second through hole that is connected with the 3rd groove radially is set on the lining ring, and the 3rd Sealing is arranged on the front side of the pad that presses.

2. controllable type air spring according to claim 1 is characterized in that: in first groove between described box type piston bar and the piston liner is set also, liner is arranged on the arc collar and presses between the pad.