CN201461827U

CN201461827U - Air spring

Info

Publication number: CN201461827U
Application number: CN2009201035905U
Authority: CN
Inventors: 殷彦彬
Original assignee: Longchang Hebei Auto Parts And Components Co Ltd
Current assignee: Longchang Hebei Auto Parts And Components Co Ltd
Priority date: 2009-07-03
Filing date: 2009-07-03
Publication date: 2010-05-12
Anticipated expiration: 2019-07-03

Abstract

The utility model discloses an air spring, which mainly comprises a cylinder (1), a piston (2), a seal ring (3), a support rod (4), a guide sleeve (5) and a seal ring (6), wherein the seal ring (3) is mounted on the piston (2), the support rod (4) is connected with the piston (2), the guide sleeve (5) is arranged in the cylinder (1) with a rod cavity, and is mounted on the support rod (4), and a stop collar (7) is arranged on the support rod (4) between the piston (2) and the seal ring (6). The utility model changes the limiting method of the prior art, which arranges a rolling groove outside the air storage cylinder, instead, the internal stop collar is added in the cavity of the cylinder to have the same effect, consequently, the piston can be reliably positioned, the working stroke of the support rod can be kept consistent, and meanwhile, the strength of the cylinder can be enhanced as well.

Description

Air spring

Technical field

The utility model relates to a kind of air spring.

Background technique

Air spring is used widely in all trades and professions at present, mainly by the piston in cylinder barrel, the cylinder barrel, strut, be connected on the rod chamber cylinder barrel and be sleeved on guide sleeve on the strut and seal ring etc. is formed, contain high pressure nitrogen and part fluid in the cylinder barrel, because piston has been occupied the volume in the cylinder barrel, strut is pressed in the cylinder barrel during work, piston is made the fluid in the axial motion extrusion chamber in cylinder barrel, and the fluid pressurized gas makes piston reach the working position; After the external force disappearance that is carried on the strut, then gas restores and expands, and the gas of expansion promotes fluid and makes piston reset, and strut is shifted out, and makes air spring realize compression movement and recovery damped motion.But slot rolling outside present air spring all is pressed with on the barrel of cylinder barrel makes the annular groove that forms an indent on the cylinder barrel barrel, by this annular groove piston is carried out axial limiting.Because its inner side surface of annular groove on the cylinder barrel barrel is an arc, therefore can make the contacting point at piston and annular groove transition angle produce certain coupling mechanism force, can increase the tripping force of piston during compression, and the thrust of increase strut, and in that being carried out slot rolling, cylinder barrel adds man-hour, because of influenced by hobboing cutter size and slot rolling depth dimensions error etc., can cause the conformity of strut extrusion poor, influence the accuracy of air spring working stroke, because this slot rolling is to form a groove on the outer wall of cylinder barrel, can influence the intensity of cylinder barrel simultaneously.

Summary of the invention

After the purpose of this utility model provides a kind of slot rolling on cancellation cylinder barrel barrel, can make the air spring that the piston location is reliable, keep strut working stroke unanimity, raising cylinder barrel intensity.

The utility model air spring, mainly comprise cylinder barrel, piston, be installed in seal ring, the strut that is connected with piston on the piston, be located in the rod chamber cylinder barrel and be sleeved on guide sleeve and seal ring on the strut, between piston and seal ring, be provided with stop collar on the strut.

As a kind of improvement of the present utility model, the stop collar both ends of the surface radially are provided with radially air drain of some roads.

As another kind of improvement the of the present utility model, the stop collar outer peripheral surface is provided with the axial air drain in some roads vertically, and radially air drain is connected with axial air drain.

As another improvement of the present utility model, between stop collar and seal ring, be provided with spacer on the strut.

As a kind of improvement of the present utility model, spacer is provided with concave ring groove.

After the utility model adopts technique scheme, changed the next spacing mode of gas storage cylinder barrel peripheral hardware slot rolling in the prior art, replacing the built-in stop collar that inner cavity of cylinder sets up serves the same role, such one is to have cancelled the slot rolling structure on the cylinder barrel, can not only reduce the input of slot rolling man-hour and slot rolling equipment, whole gas storage cylinder barrel has also increased intensity, the 2nd, adopt stop collar spacing, the piston location is reliable, the influence of having avoided the slot rolling machining error to bring, guarantee the extrusion of strut, improved the accuracy of air spring working stroke, also solved the problem that there are coupling mechanism force in piston and slot rolling place, the 3rd, the structure of whole inner cavity is more reasonable, stop collar leading role in the to-and-fro motion process with guide sleeve and seal ring auxiliary support bar makes motion coaxial, and using effect is better.

Description of drawings

Fig. 1 is the structural representation of the holding state of the utility model gas control damping supported spring.

Fig. 2 is the local enlarged diagram of stop collar shown in Figure 1.

Fig. 3 looks schematic representation for a left side shown in Figure 2.

Embodiment

As shown in Figure 1, the utility model air spring mainly comprises cylinder barrel 1, piston 2, seal ring 3, strut 4, guide sleeve 5, seal ring 6 and stop collar 7, one end of strut 4 is fixed on the piston 2, the other end of strut 4 passes cylinder barrel 1, piston 2 is arranged in the cylinder barrel 1 and can moves axially, seal ring 3 is installed on the piston 2, guide sleeve 5, seal ring 6 and stop collar 7 are fixedly connected in the cylinder barrel 1 and are sleeved in turn on the strut 1, different is with conventional construction strut air spring: do not establish slot rolling on cylinder barrel 1 barrel, but undertaken spacing by set up built-in stop collar 7 at strut 4.Stop collar 7 is enclosed within on the strut 4, and a side and piston 2 end faces join, and opposite side and seal ring 6 join, and needs in the calculating of extrusion relevant in the length of stop collar 7 and the product specification.As Fig. 2, shown in Figure 3, stop collar 7 both ends of the surface radially have radially air drain 71 of 4 roads, and stop collar 7 outer peripheral surfaces have the axial air drain 72 in 4 roads vertically, and radially air drain 71 is connected with axial air drain 72, realize the space of oil gas circulation, storage and do not have the vacuum defective.Air drain groove depth or groove width can change, and comprise that with product performance the length section of buffer speed, buffering is relevant, and its correlation properties play guarantee effect to the space that oil mass is injected back oil, gas storage.In addition; between strut 4 upper limits cover 7 and seal ring 6, can increase spacer 8; have concave ring groove 81 on the spacer 8; do not adorn lubricating grease in the cavity of seal ring 6; 8 pairs of seal rings 6 of spacer protect; play the effect that stops dirt, withstands shocks seal ring 6 pressure, protection seal ring 6 lips and piston rod 4 surfaces are not scratched.Carry impact force and,, guarantee that seal ring 6 is in the effect of normality seal operation state by the concave ring groove on the spacer 8 81 to the periphery dispersion by these groove 81 drainages.Strut 1 is made axially reciprocating in the axis hole of guide sleeve 5, seal ring 6, spacer 8 and stop collar 7.

Claims

1. air spring, mainly comprise cylinder barrel (1), piston (2), be installed in seal ring (3), the strut (4) that is connected with piston (2) on the piston (2), be located in the rod chamber cylinder barrel (1) and be sleeved on guide sleeve (5) and seal ring (6) on the strut (4), it is characterized in that: between piston (2) and seal ring (6), is provided with stop collar (7) on the described strut (4).

2. air spring according to claim 1 is characterized in that: described stop collar (7) both ends of the surface radially are provided with radially air drain (71) of some roads.

3. air spring according to claim 1 is characterized in that: described stop collar (7) outer peripheral surface is provided with the axial air drains in some roads (72) vertically, and described radially air drain (71) is connected with axial air drain (72).

4. air spring according to claim 1 is characterized in that: described strut (4) is gone up and be provided with spacer (8) between stop collar (7) and seal ring (6).

5. air spring according to claim 4 is characterized in that: described spacer (8) is provided with concave ring groove (81).