CN102606663B - Additional air chamber of volume-variable air spring - Google Patents
Additional air chamber of volume-variable air spring Download PDFInfo
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- CN102606663B CN102606663B CN201210075510.6A CN201210075510A CN102606663B CN 102606663 B CN102606663 B CN 102606663B CN 201210075510 A CN201210075510 A CN 201210075510A CN 102606663 B CN102606663 B CN 102606663B
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- piston
- keyway
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- ventilation module
- air chamber
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Abstract
The invention discloses an additional air chamber of a volume-variable air spring and relates to an additional air chamber of the air spring for vehicle. The additional air chamber of the volume-variable air spring comprises an additional air chamber cavity, a connecting pipeline for connecting a main air chamber, a piston, a piston rod, a ventilating module, a key groove, a key, a cover plate, an elongated pipeline, and on the like. The additional air chamber can change the volume by controlling the reciprocating motion of the piston, so that the effective volume of the air spring in work is changed, the rigidity of an air spring system is further changed to adapt to various driving situations of vehicles and achieve the purpose of improving the comprehensive performance of a suspension system; as the driving force required during piston movement is small, the ventilating module is timely opened and closed to ensure the stability of the gas pressure at the inner part of the spring, reduce the impact generated in the working process of the spring and provide convenience for the use of the additional air chamber of the volume-variable air spring on the vehicle. The additional air chamber of the volume-variable air spring is simple in structure, low in requirement of producing technique, convenient to maintain and low in manufacturing cost.
Description
Technical field
The present invention relates to the auxiliary chamber of air spring for automobile, particularly a kind of air spring additional air chamber of variable volume.
Background technique
Pneumatic spring is to utilize the compressibility of gas to realize its elastic reaction, has buffering, the function of vibration isolation.The volume of pneumatic spring on its stiffness characteristics impact significantly, in the paper < < band auxiliary chamber pneumatic spring mechanics special parameter test > > that the Zhu Sihong of domestic Agricultural University Of Nanjing shows at it, mention, change with air spring additional air chamber volume is large, and air spring rigidity diminishes.
In order to make the various complex working conditions of air suspension adaptation Vehicle Driving Cycle, by changing the volume of pneumatic spring, change the stiffness characteristics of spring, can make the superiority of pneumatic spring be given full play to, applicability is more extensive.For many years, Chinese scholars has been done a large amount of research to this, but the mostly constant (application number: 03243150.3) of auxiliary chamber volume of the pneumatic spring with auxiliary chamber of studying, or can exert an influence to the height of pneumatic spring while changing auxiliary chamber volume, and the driving force of required change auxiliary chamber is large (Patent Number:5169129), has limited the performance with auxiliary chamber pneumatic spring superiority.
The present invention is directed to existing air spring additional air chamber volume can not change, or in change process, affect the height of pneumatic spring and realize driving force that auxiliary chamber changes present situation greatly, the air spring additional air chamber that provides a kind of volume that can overcome above-mentioned shortcoming to regulate, by the change of spring volume, improve the performance of spring system, the superiority of pneumatic spring is given full play to, under different operating modes when Vehicle Driving Cycle, improve run smoothness and the riding comfort of vehicle.
Summary of the invention
Technical problem to be solved by this invention is the actual volume that changes air spring additional air chamber, and change in the process of auxiliary chamber actual volume, guarantee the stable of pneumatic spring internal gas pressure, avoid because auxiliary chamber volume changes, suspension system being produced and being impacted.
The technological scheme that realizes the object of the invention is to the present invention includes auxiliary chamber cavity, connecting pipeline, piston, piston rod, limiting stopper, little hole path, seal ring, cover plate, elongate conduit, ventilation module, fixed connection apparatus, driving mechanism connection set, the standby cavity volume of auxiliary chamber, auxiliary chamber actual volume chamber, key, keyway, positive stop key and spacing keyway.Described auxiliary chamber cavity closed end is connected with pneumatic spring by connecting pipeline.Described auxiliary chamber inside cavity is equipped with reciprocating piston, on piston, coordinates ventilation module is housed, and ventilation module has friction layer with the surface Machining that auxiliary chamber cavity contacts, and this friction layer is double to seal, and guarantees that piston both sides gas is not connected.On the surface that piston matches with ventilation module, be processed with keyway, fitting key on the elongation line of every keyway center line, on the matching surface of ventilation module and piston, be processed with keyway, on the elongation line of every keyway center line, key is installed, the surface that ventilation module contacts with piston is provided with spacing keyway and the positive stop key cooperatively interacting.Piston center assembling piston rod.Described auxiliary chamber cavity open end is by cover plate for sealing, and cover plate center position has the hole coordinating with piston rod, and piston rod passes from this hole, and seal ring is installed, and guarantees the tightness of described auxiliary chamber cavity integral body.
In the present invention, by piston movement, realize the change of auxiliary chamber volume.Because the friction factor of the surface of contact between ventilation module and piston is less than the friction factor of the friction layer between ventilation module and auxiliary chamber chamber wall, therefore when piston is subject to encouraging, the frictional force between piston and ventilation module is less than the maximum static friction force between ventilation module and auxiliary chamber chamber wall.So when piston setting in motion, ventilation module keeps static, produces relative displacement between the two.The length of the keyway in described piston and ventilation module is less than piston thickness, the feature coordinating with key is: the key in ventilation module coordinates with the keyway on piston, keyway in key on piston and ventilation module coordinates, form one group of gas circuit to be opened/closed cooperatively interacting, the length sum that cooperatively interacts into two keyways of a gas circuit is greater than two key length sums in piston thickness and gas circuit; Keyway in the module of ventilating and on piston is corresponding one by one, forms some groups of gas circuits; Half gas circuit in some gas circuits is contrary with the installation direction of second half gas circuit, while producing relative displacement between assurance piston and ventilation module, when a gas circuit is opened, always has at least one gas circuit to keep closing; When key slips into keyway, can guarantee that both contact positions are in sealing state, guarantee that the gas circuit that this key and keyway form is closed state; The distance of key and piston centreline space is large as far as possible; Width of keyway is identical; The center line of every keyway in ventilation module and a keyway center line on piston overlap.On the surface of contact of ventilation module and piston, offer respectively spacing keyway and positive stop key, spacing keyway and positive stop key cooperatively interact, the symmetry center of restraining groove is positioned in the centre symmetry line of piston, positive stop key can guarantee that to the stroke of a direction two keys of every gas circuit fully skid off keyway, and continues to skid off certain distance.When piston is encouraged and during setting in motion, can produce relative displacement between piston and ventilation module, make key skid off keyway, cause opening of gas circuit; Because positive stop key and restraining groove coordinate all the time, so reach after certain value in relative displacement, ventilation module can be dragged by piston.Now, because gas circuit is opened, piston two ends air pressure balances each other, therefore piston moves, can not be subject to huge draught head resistance.When ventilation block motion is after specified position, motion certain distance round about, key slips into keyway again, and gas circuit is closed.The diameter ratio of described elongate conduit length and piston is that 1:1, slenderness ratio are 150～200, elongate conduit is coiled into " snake " shape and is fixed on piston face, the length of the every folding of " snake " shape is 30mm～80mm, and elongate conduit is by described aperture channel connection piston both sides cavity.
The invention has the beneficial effects as follows:
When A, piston movement, because the frictional force between piston and auxiliary chamber cavity is less than the frictional force between ventilation module and auxiliary chamber cavity, between piston and ventilation module, produce relative displacement, open at least one gas circuit, piston both sides gas pressure is identical, reduce the operating load of piston rod drive unit, and while guaranteeing that auxiliary chamber actual volume cavity volume changes without compression shock, guarantee the stable of pneumatic spring height.When ventilation block motion is to desired location, piston moves round about, closes gas circuit, rear stop motion.
B, piston are in a certain position during in relative static conditions, gas circuit is closed, when vehicle operating, pneumatic spring internal gas pressure produces concussion under extraneous percussion, the gas of concussion forms Yong Sai, turbulent phenomenon in elongate conduit bending, big L/D ratio, dynamic gas is produced to damping function, stop flowing of piston both sides gas, the actual volume of pneumatic spring remains unchanged.
C, piston are when in a certain position, relatively static and vehicle is also relatively static, and gas circuit is closed, and spring inner gas can flow by elongate conduit, and piston both sides gas communicates, and guarantees that gas circuit throws open Shi Buhui pneumatic spring is produced and impacted.
The present invention is simple in structure, and manufacturing technique requirent is low, easy to maintenance and effectively realized reliably stable in the variable volume of auxiliary chamber and transition process thereof, for the application of auxiliary chamber variable volume air spring system on vehicle provided convenience.This invention is not only confined to be applied on vehicle suspension system, all applicable for the pneumatic spring of installing and using in machinery, rail vehicle.
Accompanying drawing explanation
In order more fully to understand structure of the present invention and working principle, below in conjunction with accompanying drawing, describe in detail.
Fig. 1 is embodiment of the present invention structural representation.
Fig. 2 is the mounting arrangements schematic diagram of elongate conduit on piston.
Fig. 3 is the layout schematic diagram of keyway, key and positive stop key on piston and ventilation module contact surface.
Fig. 4 is the layout schematic diagram of keyway, key and spacing keyway on ventilation module and piston contact surface.
Fig. 5 is the schematic diagram of gas circuit in open mode.
Fig. 6 is the schematic diagram of gas circuit in closed condition.
In figure: 1-connecting pipeline; 2-auxiliary chamber cavity; 3-piston; 4-piston rod; 5-limiting stopper; 6-seal ring; 7-driving mechanism connection set; 8-cover plate; 9-fixed connection apparatus; The standby cavity volume of 10-auxiliary chamber; 11-elongate conduit; 12-ventilation module, dash area is friction layer; 13-little hole path; 14-auxiliary chamber actual volume chamber; 3-piston; 11-elongate conduit; 15-keyway A, 17-keyway B, 20-keyway C, 22-keyway D; 19-key A, 21-key B, 16-key C, 18-key D; 23-spacing keyway; 24-positive stop key.
Embodiment
Describe with reference to the accompanying drawings embodiments of the invention in detail.
Be the air spring additional air chamber of variable volume for a kind of passenger vehicle as shown in Figure 1, comprise auxiliary chamber cavity 2 and connecting pipeline 1, auxiliary chamber cavity 2 closed ends are connected with pneumatic spring body by connecting pipeline 1, and open end seals by cover plate 8.Piston 3 is housed in auxiliary chamber cavity 2, and piston thickness is 25mm, assembles piston rod 4 on piston 3, and piston 3 is equipped with elongate conduit 11 near the surface of cover plate 8, and elongate conduit 11 is coiled into the surface that " snake " shape is fixed on piston 3.As shown in Figure 2, elongate conduit 11 length are 350mm, and internal diameter is 2mm, crooked 7 foldings, and the length of every folding is from left to right followed successively by 40mm, 50mm, 70mm, 70mm, 50mm, 40mm and 30mm.Piston 3 and piston rod 4 joint mounting limit pieces 5, prevent that piston movement from damaging elongate conduit 11 to bottom time.On piston 3, symmetry is equipped with ventilation module 12, and ventilation module 12 contacts with auxiliary chamber cavity 2, and has with respect to larger frictional force between piston 3 and auxiliary chamber cavity 2.As shown in Figure 3, on the surface that piston 3 contacts with ventilation module, have keyway A15 and keyway B17, at centre of surface position mounting limit key 24, and key C16 and key D18 be installed on the elongation line of keyway center line, on the surface that ventilation module 12 contacts with piston 3, have keyway C20 and keyway D22, and key A19 and key B21 be installed on the elongation line of keyway center line, in central position, have spacing keyway 23, keyway length is 18mm, width is 5mm, and key length is 5mm, and width is 5mm, positive stop key slot length is 20mm, and width is 5mm.Cover plate 8 center drillings, piston rod 4 seals hole by seal ring 6 through rear from the hole of cover plate 8, guarantees the sealing of auxiliary chamber integral body.Piston rod 4 is driven by driving mechanism connection set 7, and its drive form can be hydraulic pressure, electronic, crank-connecting rod and other driving mode.
When piston is relatively static, driving mechanism connection set 7 guarantees that piston 3 rests on a certain position, and between ventilation module 12 and piston 3, without relative displacement, gas circuit is sealed as shown in Figure 3.Spring is when static state, and piston 3 is divided into actual volume chamber 14 and standby cavity volume 10 two-part by auxiliary chamber cavity 2.Elongate conduit 11 is communicated with piston 3 both sides cavitys by aperture passage 13, and actual volume chamber 14 is identical with standby cavity volume 10 air pressure, has reduced the pressure of driving mechanism connection set 7, and guarantees that gas circuit on piston opens Shi Buhui spring is produced and impacted.When pneumatic spring is subject to external excitation, γ-ray emission concussion in actual volume chamber 14, due to the complicated bend shape of elongate conduit 11 and large slenderness ratio, the gas flow of concussion forms Yong Sai, turbulent phenomenon while crossing elongate conduit 11, produce vapour lock effect, separator piston both sides cavity, only has the 14 participation work of actual volume chamber, has guaranteed actual volume stable of spring.
In piston 3 movement processes, because the frictional force between piston 3 and ventilation module 12 is less than the maximum static friction force between ventilation module 12 and cavity 2, between piston body 3 and ventilation module 12, produce relative displacement, as the key D18 in Fig. 3, key A19 skids off as the keyway A15 in Fig. 3, key D22, or as the key C16 in Fig. 3, key B21 skids off as the keyway B17 in Fig. 3, keyway C20, gas circuit is opened, as shown in figure as left in Fig. 4, piston 3 both sides gases are communicated with, guarantee that in piston movement process, two-part air pressure is identical, in 14 change procedures of actual volume chamber, can not produce compression shock, guaranteed the stable of pneumatic spring height.Meanwhile, in the process of driving mechanism connection set 7 driven plunger, can not cause extra work load to drive unit.Because positive stop key 24 and restraining groove 23 coordinate all the time, so reach after certain value in relative displacement, ventilation module can be dragged by piston.When ventilation module 12 moves to after desired location, piston 3 is motion certain distance round about, and gas circuit is closed, rear stop motion.
In above process, the structure of elongate conduit 11, the physical dimension of keyway and key, the design of friction layer, piston positioning means, the structure of seal ring and stuffing box gland all has multiple design, does not enumerate.
The object that above specific implementation method of the present invention is described is in order to give an example and explanation.They and not exclusively and its do not limit the invention to the clear and definite form disclosing.Obviously, according to example above, may there be many distortion and variation.The embodiment who more than selects and describe is in order to explain best principle and the practical application thereof of invention, thereby makes others skilled in the art can use better the different embodiments of the various distortion of the present invention and various predetermined specific uses.Scope of the present invention should be limited by claims below and their equivalent.
The present invention is not limited to above-mentioned specific implementation method, and every employing Similarity algorithm of the present invention and similar variation, all should list protection scope of the present invention in.
Claims (9)
1. an air spring additional air chamber for variable volume, comprises connecting pipeline (1), auxiliary chamber cavity (2), piston (3), piston rod (4), limiting stopper (5), seal ring (6), driving mechanism connection set (7), cover plate (8), fixed connection apparatus (9), the standby cavity volume of auxiliary chamber (10), elongate conduit (11), little hole path (13) and auxiliary chamber actual volume chamber (14), sealing one end, described auxiliary chamber cavity (2) one end is opened wide, open end is by cover plate (8) sealing, the piston rod (4) that piston (3) is housed in described auxiliary chamber cavity (2) and is connected with piston (3), described piston (3) is equipped with elongate conduit (11) near the one side of cover plate (8), on piston (3), offer little hole path (13), little hole path (13) is connected with elongate conduit (11), described piston rod (4) is driven by the driving mechanism connection set (7) that connects driving mechanism through cover plate (8), and described auxiliary chamber cavity (2) closed end is connected with pneumatic spring by connecting pipeline (1), it is characterized in that, also comprise ventilation module (12), key C(16), key D(18), key A(19), key B(21), keyway A(15), keyway B(17), keyway C(20), keyway D(22), spacing keyway (23) and positive stop key (24), piston (3) outer rim symmetry is equipped with the ventilation module (12) identical with piston (3) thickness, on described piston (3), the surface contacting with ventilation module (12) is provided with key (16, 18) and keyway (15, 17), in described ventilation module (12), the surface contacting with piston (3) is provided with key A(19), key B(21) with keyway A(15), keyway B(17), key C(16 on described piston (3)) with the keyway C(20 ventilating in module (12)) cooperatively interact, key D(18 on piston (3)) with the keyway D(22 ventilating in module (12)) cooperatively interact, key A(19 in ventilation module (12)) the keyway A(15 and on piston (3)) cooperatively interact, key B(21 in ventilation module (12)) with the upper keyway B(17 sending out of piston (3)) cooperatively interact, on the surface contacting with ventilation module (12) at piston (3), positive stop key (24) is installed, on the surface contacting, is provided with spacing keyway (23) in ventilation module (12) with piston (3), positive stop key (24) and spacing keyway (23) cooperatively interact.
2. the air spring additional air chamber of variable volume according to claim 1, it is characterized in that, described ventilation module (12) has friction layer with the surface Machining that auxiliary chamber cavity (2) contacts, and the friction factor of friction layer is greater than the friction factor of piston (3) and auxiliary chamber cavity (2) contact surface.
3. the air spring additional air chamber of variable volume according to claim 1 and 2, it is characterized in that, when piston (3) is mobile, the frictional force that friction layer between auxiliary chamber cavity (2) and ventilation module (12) produces makes piston (3) and ventilation module (12) produce relative displacement, described key A(19) slip into and skid off keyway A(15), key B(21) slip into and skid off keyway B(17), key C(16) slip into and skid off keyway C(20), key D(18) slip into and skid off keyway D(22), when slipping into keyway, described key can seal keyway.
4. the air spring additional air chamber of variable volume according to claim 1 and 2, it is characterized in that, keyway C(20 in ventilation module (12)) center line and the keyway B(17 on piston (3)) center line overlap, keyway D(22) center line and the keyway A(15 on piston (3)) center line overlap; The upper key A(19 of ventilation module (12)) center line and keyway A(15) center line overlap, key B(21) center line and keyway B(17) center line overlap, key C(16 on piston (3)) center line and keyway C(20) center line overlap, key D(18) center line and keyway D(22) center line overlap, key A(19) with keyway A(15) coordinate, key B(21) with keyway B(17) coordinate, key C(16) with keyway C(20) coordinate, key D(18) with keyway D(22) coordinate, form one group of gas circuit to be opened/closed cooperatively interacting.
5. the air spring additional air chamber of variable volume according to claim 1 and 2, is characterized in that, the keyway on ventilation module (12) and piston (3) is corresponding one by one, forms gas circuit; Half gas circuit in gas circuit is contrary with the installation direction of second half gas circuit, and when the relative position of piston (3) and ventilation module (12) changes, a gas circuit is opened, and always has a gas circuit to keep closing.
6. the air spring additional air chamber of variable volume according to claim 5, is characterized in that, the length sum that cooperatively interacts into two keyways of a gas circuit is greater than two key length sums in the thickness of piston (3) and gas circuit, and the width of keyway and key is identical.
7. the air spring additional air chamber of variable volume according to claim 1 and 2, it is characterized in that, the symmetry center of described spacing keyway (23) is positioned on the center line of piston, and two keys that positive stop key (24) is greater than every gas circuit to the stroke of other directions skid off the stroke of keyway completely.
8. the air spring additional air chamber of variable volume according to claim 1 and 2, is characterized in that, described elongate conduit (11) slenderness ratio is 150 ~ 200, and is coiled into the surface that " snake " shape is fixed on piston (3).
9. the air spring additional air chamber of variable volume according to claim 1 and 2, is characterized in that, described piston (3) below and piston rod (4) joint mounting limit piece (5), protection elongate conduit (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210075510.6A CN102606663B (en) | 2012-03-21 | 2012-03-21 | Additional air chamber of volume-variable air spring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210075510.6A CN102606663B (en) | 2012-03-21 | 2012-03-21 | Additional air chamber of volume-variable air spring |
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| CN102606663A CN102606663A (en) | 2012-07-25 |
| CN102606663B true CN102606663B (en) | 2014-02-12 |
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| CN105835649B (en) * | 2016-03-18 | 2018-04-24 | 江苏大学 | A kind of hydro pneumatic suspension and its control method with variable volume auxiliary chamber |
| CN106312606B (en) * | 2016-09-30 | 2018-07-06 | 中车南京浦镇车辆有限公司 | The anti-bits tooling in rail vehicle framework air spring hole |
| CN108518440A (en) * | 2018-06-14 | 2018-09-11 | 海南大学 | A kind of shared gas chamber of the air suspension of variable volume |
| CN108730397A (en) * | 2018-06-26 | 2018-11-02 | 海南大学 | A kind of air spring additional air chamber of variable volume |
| CN114278629B (en) * | 2021-11-24 | 2024-03-22 | 中联重科土方机械有限公司 | Hydraulic oil tank, hydraulic system and air pressure balancing method of hydraulic oil tank |
| CN115092062B (en) * | 2022-08-01 | 2023-04-04 | 深圳金源恒泰科技有限公司 | Vehicle-mounted system and device for positioning school bus safe track |
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| DE3217864A1 (en) * | 1982-05-12 | 1983-11-24 | Schiedel GmbH & Co, 8000 München | Hydraulically acting shock absorber and vibration damper |
| US4787486A (en) * | 1986-06-19 | 1988-11-29 | Pneumo Abex Corporation | Landing gear mechanism including controlled instroke and rebound damping and stroke overload protection |
| EP1186795A2 (en) * | 2000-08-29 | 2002-03-13 | Romeo Bordignon | Controlled-recovery pneumatic spring and apparatus including such a pneumatic spring |
| CN201891790U (en) * | 2010-11-18 | 2011-07-06 | 江苏大学 | Volume-variable constant-internal-pressure air spring additional air chamber |
| CN201891791U (en) * | 2010-11-19 | 2011-07-06 | 江苏大学 | Additional air chamber with variable volume of air spring |
| CN102207161A (en) * | 2011-04-02 | 2011-10-05 | 江苏大学 | Additional air chamber of air spring with variable volume |
| CN202118168U (en) * | 2011-05-24 | 2012-01-18 | 扬州市明瑞气弹簧有限公司 | Compression air spring |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050040574A1 (en) * | 2003-08-19 | 2005-02-24 | Ivers Douglas E. | Pneumatic surface effect damper |
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2012
- 2012-03-21 CN CN201210075510.6A patent/CN102606663B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3217864A1 (en) * | 1982-05-12 | 1983-11-24 | Schiedel GmbH & Co, 8000 München | Hydraulically acting shock absorber and vibration damper |
| US4787486A (en) * | 1986-06-19 | 1988-11-29 | Pneumo Abex Corporation | Landing gear mechanism including controlled instroke and rebound damping and stroke overload protection |
| EP1186795A2 (en) * | 2000-08-29 | 2002-03-13 | Romeo Bordignon | Controlled-recovery pneumatic spring and apparatus including such a pneumatic spring |
| CN201891790U (en) * | 2010-11-18 | 2011-07-06 | 江苏大学 | Volume-variable constant-internal-pressure air spring additional air chamber |
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| CN202118168U (en) * | 2011-05-24 | 2012-01-18 | 扬州市明瑞气弹簧有限公司 | Compression air spring |
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