CN201496465U - Piston used for gas spring - Google Patents

Piston used for gas spring Download PDF

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Publication number
CN201496465U
CN201496465U CN2009203053537U CN200920305353U CN201496465U CN 201496465 U CN201496465 U CN 201496465U CN 2009203053537 U CN2009203053537 U CN 2009203053537U CN 200920305353 U CN200920305353 U CN 200920305353U CN 201496465 U CN201496465 U CN 201496465U
Authority
CN
China
Prior art keywords
piston
annular
cover plate
groove
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2009203053537U
Other languages
Chinese (zh)
Inventor
罗萍
唐旭东
刘永贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Longchang Shanchuan Precision Welded Tube Co Ltd
Original Assignee
Longchang Shanchuan Precision Welded Tube Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Longchang Shanchuan Precision Welded Tube Co Ltd filed Critical Longchang Shanchuan Precision Welded Tube Co Ltd
Priority to CN2009203053537U priority Critical patent/CN201496465U/en
Application granted granted Critical
Publication of CN201496465U publication Critical patent/CN201496465U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a piston used for a gas spring, which comprises an annular piston body, and an annular cover plate and an annular baffle which are respectively clung to two end surfaces of the piston body. The external diameter of the annular baffle plate is smaller than that of the piston body; a ring groove is formed on the piston body at the end adjacent to the annular baffle plate; a seal ring is arranged in the ring groove; an axial through-flow hole is formed in the piston body and communicated with the ring groove; a labyrinth through-flow groove is formed on the end surface where the piston body is in contact with the annular cover plate, and the tail end of the through-flow groove is arranged on the side wall of the piston body; a throttling pore connecting the through-flow hole and the beginning end of the through-flow groove is also formed in the piston body; and the diameter of the throttling pore is smaller than that of the through-flow hole. As a further improvement of the utility model, the external diameter of the annular cover plate is smaller than that of the piston body; the piston body is made of engineering plastics; and both the annular cover plate and the annular baffle plate adopt metal material. The utility model can eliminate abnormal noise, and has the advantages of easy processing, high dimensional precision and good uniformity.

Description

The piston that is used for air spring
Technical field
The utility model relates to a kind of piston that is used for air spring.
Background technique
The piston that is used for the air spring on the vehicle shock absorber, need in airtight gas cylinder, to be mobile the provide passage of pressurized gas between epicoele and cavity of resorption, and under the product compressive state, bring into play throttle effect, make product buffer function be arranged, avoid producing and impact at the compression stroke end.Existing structure of piston and user mode are as shown in Figure 1, this piston 8 is for metal material and be provided with annular groove 9, be provided with seal ring 10 in the annular groove 9, in piston 8, also be provided with the axial through flow hole 11 and the throttling pore 12 that communicate with annular groove 9, by the two ends of through flow hole 11, annular groove 9 and throttling pore 12 connection pistons 8, this piston 8 is loaded on the piston rod 13; When air spring was made compression movement, gas flowed to epicoele by throttling pore 12 and barrel gap through through flow hole 11 from cavity of resorption in the tube; When air spring was made extending movement, gas flowed to cavity of resorption by through flow hole 11 through throttling pore 12 from epicoele in the tube; Air spring is when the extending movement end of travel, and fluid buffering effect occurs producing damping by throttling pore 12; But when fluid passes through throttling pore 12, because damping function will produce the throttling sound; And when there was lateral force in air spring in movement process, at compression movement stroke top, because guidance quality is relatively poor relatively, piston 8 will produce friction generation abnormal sound with gas receiver 14 inwalls of metal; The manufacturing expense of processing throttling pore 12 in addition is higher, and efficient is low, and processing difficulties, and dimensional accuracy is wayward, and the rate of stretch was inconsistent when this will cause the air spring motion, caused the usability instability.
The model utility content
The purpose of this utility model is the above-mentioned deficiency at prior art, and a kind of piston that is used for air spring is provided, and it can eliminate abnormal sound, and have be easy to process, the advantage of dimensional accuracy height, high conformity, improved the stability of usability.
For achieving the above object, the piston that is used for air spring of the present utility model, the piston only that comprises annular, it is characterized in that also comprising respectively annular cover plate and the ring baffle be close to the piston only both ends of the surface, the external diameter of ring baffle is less than the external diameter of piston only, and an end adjacent with ring baffle at piston only is provided with annular groove, is provided with seal ring in the annular groove, be provided with axial through flow hole in piston only, through flow hole communicates with annular groove; Be provided with the through-flow groove of mazy type on piston only and end face that annular cover plate contacts, the end of through-flow groove is located on the sidewall of piston only; Also be provided with the throttling pore that is communicated with through flow hole and through-flow groove starting point in piston only, the diameter of throttling pore is less than through flow hole.
At the extending movement end of travel, fluid flows through that throttling pore is laggard goes into the through-flow groove of mazy type, and wriggles therein and enter the gas receiver cavity of resorption after flowing; In this movement process, because through-flow groove is having many bends or curves labyrinth-like, fluid flowed obviously to be obstructed and caused speed slowly to be got off this moment, and channel bends causes the liquid collision, interfered mutually, thereby reached the effect that abates the noise;
As further improvement of the utility model, the external diameter of described annular cover plate is less than the external diameter of piston only; Be convenient to fluid and enter the gas receiver cavity of resorption.
As further improvement of the utility model, the material of described piston only is engineering plastics, and annular cover plate and ring baffle are metal material; Annular cover plate and ring baffle can guarantee the rigidity of the join strength and the piston of piston and piston rod, and contact with the gas receiver inwall have only piston only, it has good noise elimination absorbing performance, can eliminate the abnormal sound problem of bringing because of friction fully; This piston only is plastics, can adopt integral die moulding (comprising throttling pore), has saved the operation of processing throttling pore, improve work efficiency, reduced product cost, and the dimensional accuracy height, high conformity has guaranteed the stable of air spring usability.
In sum, the utility model can be eliminated abnormal sound, and have be easy to process, the advantage of dimensional accuracy height, high conformity, improved the stability of usability.
Description of drawings
Fig. 1 is the plan view of existing air spring piston user mode.
Fig. 2 is the utility model embodiment's a plan view.
Fig. 3 is the plan view of piston only among Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
By Fig. 2 and shown in Figure 3, this is used for the piston of air spring, the piston only 1 that comprises annular, annular cover plate 2 and the ring baffle of being close to piston only 1 both ends of the surface 3 respectively, this three part is contained on the piston rod axle journal and by the mode of revolving the riveting axle journal and is fixed together, the material of piston only 1 is engineering plastics, annular cover plate 2 and ring baffle 3 are metal material, the external diameter of annular cover plate 2 and ring baffle 3 is all less than the external diameter of piston only 1, be provided with annular groove at piston only 1 and ring baffle 3 adjacent ends, be provided with seal ring 4 in the annular groove, be provided with axial through flow hole 5 in piston only 1, through flow hole 5 communicates with annular groove 4; Be provided with the through-flow groove 6 of mazy type on piston only 1 and end face that annular cover plate 2 contacts, the terminal 6a of through-flow groove is located on the sidewall of piston only 1; Also be provided with the throttling pore 7 that is communicated with through flow hole 5 and through-flow groove 6 starting points in piston only 1, the diameter of throttling pore 7 is less than through flow hole 5.
Air spring is at the end of extending movement stroke, and fluid flows through that throttling pore 7 is laggard goes into the through-flow groove 6 of mazy type, and wriggles therein and enter the gas receiver cavity of resorption after flowing; In this movement process, because through-flow groove 6 is having many bends or curves labyrinth-like, fluid flowed obviously to be obstructed and caused speed slowly to be got off this moment, and channel bends causes the liquid collision, interfered mutually, thereby reached the effect that abates the noise; Annular cover plate 2 and ring baffle 3 are metal material, the two can guarantee the rigidity of the join strength and the piston of piston and piston rod, and what contact with the gas receiver inwall has only piston only 1, and it has good noise elimination absorbing performance, can eliminate the abnormal sound problem of bringing because of friction fully; This piston only 1 is plastics, can adopt integral die moulding (comprising throttling pore 7), has saved the operation of processing throttling pore 7, improve work efficiency, reduced product cost, and the dimensional accuracy height, high conformity has guaranteed the stable of air spring usability.

Claims (3)

1. piston that is used for air spring, the piston only that comprises annular, it is characterized in that also comprising respectively annular cover plate and the ring baffle be close to the piston only both ends of the surface, the external diameter of ring baffle is less than the external diameter of piston only, an end adjacent with ring baffle at piston only is provided with annular groove, be provided with seal ring in the annular groove, be provided with axial through flow hole in piston only, through flow hole communicates with annular groove; Be provided with the through-flow groove of mazy type on piston only and end face that annular cover plate contacts, the end of through-flow groove is located on the sidewall of piston only; Also be provided with the throttling pore that is communicated with through flow hole and through-flow groove starting point in piston only, the diameter of throttling pore is less than through flow hole.
2. the piston that is used for air spring as claimed in claim 1 is characterized in that the external diameter of the external diameter of described annular cover plate less than piston only.
3. the piston that is used for air spring as claimed in claim 1 or 2, the material that it is characterized in that described piston only is engineering plastics, annular cover plate and ring baffle are metal material.
CN2009203053537U 2009-06-30 2009-06-30 Piston used for gas spring Expired - Fee Related CN201496465U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009203053537U CN201496465U (en) 2009-06-30 2009-06-30 Piston used for gas spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009203053537U CN201496465U (en) 2009-06-30 2009-06-30 Piston used for gas spring

Publications (1)

Publication Number Publication Date
CN201496465U true CN201496465U (en) 2010-06-02

Family

ID=42439673

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009203053537U Expired - Fee Related CN201496465U (en) 2009-06-30 2009-06-30 Piston used for gas spring

Country Status (1)

Country Link
CN (1) CN201496465U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213287A (en) * 2011-05-24 2011-10-12 扬州市明瑞气弹簧有限公司 Throttle buffering gas spring
CN108027002A (en) * 2015-09-18 2018-05-11 株式会社利富高 Damper
GB2568456A (en) * 2017-09-27 2019-05-22 Continental Automotive Systems Srl A valve with a serrated edge design in air spring suspension unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213287A (en) * 2011-05-24 2011-10-12 扬州市明瑞气弹簧有限公司 Throttle buffering gas spring
CN108027002A (en) * 2015-09-18 2018-05-11 株式会社利富高 Damper
GB2568456A (en) * 2017-09-27 2019-05-22 Continental Automotive Systems Srl A valve with a serrated edge design in air spring suspension unit
GB2568456B (en) * 2017-09-27 2019-12-18 Continental Automotive Systems Srl A valve with a serrated edge design in air spring suspension unit

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100602

Termination date: 20120630