CN102606663A - Additional air chamber of volume-variable air spring - Google Patents
Additional air chamber of volume-variable air spring Download PDFInfo
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- CN102606663A CN102606663A CN2012100755106A CN201210075510A CN102606663A CN 102606663 A CN102606663 A CN 102606663A CN 2012100755106 A CN2012100755106 A CN 2012100755106A CN 201210075510 A CN201210075510 A CN 201210075510A CN 102606663 A CN102606663 A CN 102606663A
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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 pneumatic spring auxiliary 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 to its stiffness characteristics influence significantly; The Zhu Sihong of domestic Agricultural University Of Nanjing mentions in its paper of showing " test of band auxiliary chamber pneumatic spring mechanics parameters "; Change with pneumatic spring auxiliary chamber volume is big, and air spring rigidity diminishes.
In order to make air suspension adapt to the various complex working conditions of vehicle driving, change the stiffness characteristics of spring through the volume that changes pneumatic spring, can make the superiority of pneumatic spring be able to give 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 the auxiliary chamber volume of the pneumatic spring of the band auxiliary chamber of being studied; Can the height of pneumatic spring be exerted an influence when perhaps changing the auxiliary chamber volume, and the driving force of required change auxiliary chamber big (Patent Number:5169129), limited the performance of band auxiliary chamber pneumatic spring superiority.
The present invention is directed to existing pneumatic spring auxiliary chamber volume can not change; Influence the height and the driving force present situation greatly that realizes that auxiliary chamber changes of pneumatic spring in the perhaps change process; The pneumatic spring auxiliary chamber that provides a kind of volume that can overcome above-mentioned shortcoming to regulate, the change through the spring volume improves the performance of spring system, makes the superiority of pneumatic spring be able to give full play to; Under the different operating modes when vehicle driving, improve the 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 the pneumatic spring auxiliary chamber; And change in the process of auxiliary chamber actual volume; Stablizing of assurance pneumatic spring internal gas pressure avoids because the auxiliary chamber volume changes suspension system being produced impact.
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 subsequent use cavity volume of auxiliary chamber, auxiliary chamber actual volume chamber, key, keyway, positive stop key and spacing keyway.Said auxiliary chamber cavity closed end is connected with pneumatic spring through connecting pipeline.Said auxiliary chamber inside cavity is equipped with reciprocating piston, cooperates on the piston ventilation module is housed, and the ventilation module has friction layer with the surface Machining that the auxiliary chamber cavity contacts, and this friction layer is double to seal, and guarantees that piston both sides gas is not connected.Be processed with keyway on piston and the ventilation module surface of matching; Fitting key on the elongation line of every keyway center line; Be processed with keyway on the matching surface of ventilation module and piston; On the elongation line of every keyway center line, key is installed, the surface that the ventilation module contacts with piston is provided with spacing keyway and the positive stop key that cooperatively interacts.Centre place assembling piston rod.Said auxiliary chamber cavity open end is through cover plate for sealing, and the cover plate center position has the hole that cooperates with piston rod, and piston rod passes from this hole, and seal ring is installed, and guarantees the tightness that said auxiliary chamber cavity is whole.
Among the present invention, realize the change of auxiliary chamber volume through piston motion.Because the friction factor of the surface of contact between ventilation module and the piston is less than the friction factor of the friction layer between ventilation module and the complementary gas chamber wall; So when piston receives when encouraging, the frictional force between piston and the ventilation module is less than the maximum static friction force between ventilation module and the complementary gas chamber wall.So when the piston setting in motion, the ventilation module keeps static, promptly produces relative displacement between the two.The length of the keyway on said piston and the ventilation module is less than piston thickness; The characteristic that cooperates with key is: the key on the ventilation module cooperates with the keyway on the piston; Keyway on key on the piston and the ventilation module cooperates; Constitute one group of gas circuit to be opened/closed that cooperatively interacts, the length sum of two keyways that cooperatively interacts into a gas circuit is greater than two key length sums on piston thickness and the gas circuit; On the ventilation module with piston on keyway corresponding one by one, constitute some groups of gas circuits; Half gas circuit in some gas circuits is opposite with the installation direction of second half gas circuit, when guaranteeing to produce relative displacement between piston and the ventilation module, when a gas circuit is opened, always has at least one gas circuit to keep shut; When key slips into keyway, can guarantee that both are in sealing state by contact position, the gas circuit that promptly guarantees this key and keyway and constituted is closed state; Distance between key and centre line is big as far as possible; Width of keyway is identical; The center line of every keyway on the ventilation module and a keyway central lines on the piston.On the surface of contact of ventilation module and piston, offer spacing keyway and positive stop key respectively; Spacing keyway and positive stop key cooperatively interact; The symmetry center of restraining groove is positioned on the centre symmetry line of piston; Positive stop key can guarantee that to the stroke of a certain 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 the ventilation module, make key skid off keyway, cause opening of gas circuit; Because positive stop key and restraining groove cooperate all the time, so after relative displacement reached certain value, the ventilation module can be dragged by piston.This moment, piston two ends air pressure balanced each other, and can not receive huge draught head resistance so piston moves because gas circuit is opened.When the ventilation block motion behind specified position, motion certain distance round about, promptly key slips into keyway again, and gas circuit is closed.The diameter ratio of said elongate conduit length and piston is that 1:1, slenderness ratio are 150～200; Elongate conduit coiled " snake " shape is fixed on piston face; The length of the every folding of " snake " shape is 30mm～80mm, and elongate conduit is through said aperture channel connection piston both sides cavity.
The invention has the beneficial effects as follows:
When A, piston motion; Because the frictional force between piston and the auxiliary chamber cavity less than the frictional force between ventilation module and the auxiliary chamber cavity, produces relative displacement between piston and the ventilation module, opens at least one gas circuit; Piston both sides gas pressure is identical; Reduce the operating load of piston rod drive unit, and guarantee not have compression shock when auxiliary chamber actual volume cavity volume changes, guarantee the stable of pneumatic spring height.When ventilating block motion to desired location, piston moves round about, closes gas circuit, back stop motion.
When B, piston are in relative static conditions in a certain position; Gas circuit is closed, and when vehicle operating, the 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 damping function, stop piston both sides gas flow, the actual volume of pneumatic spring remains unchanged.
C, piston are when static relatively and vehicle is also static relatively in a certain position, and gas circuit is closed, and spring inner gas can flow through elongate conduit, and piston both sides gas communicates, and guarantee that gas circuit throws open Shi Buhui and pneumatic spring is produced impacts.
The present invention is simple in structure, and manufacturing technique requirent is low, and is easy to maintenance and effectively realized stable in variable volume and the transition process thereof of auxiliary chamber reliably, for the application of auxiliary chamber variable volume air spring system on vehicle provided convenience.This invention not only is confined to be applied on the vehicle suspension system, all is suitable for for the pneumatic spring of installing and using in machinery, the rail vehicle.
Description of drawings
In order more comprehensively to understand structure of the present invention and working principle, specify below in conjunction with accompanying drawing.
Fig. 1 is an embodiment of the invention structural representation.
Fig. 2 is the mounting arrangements schematic representation of elongate conduit on the piston.
Fig. 3 is the layout schematic representation of keyway, key and positive stop key on piston and the ventilation module contact surface.
Fig. 4 is the layout schematic representation of keyway, key and spacing keyway on ventilation module and the piston contact surface.
Fig. 5 is the schematic representation that gas circuit is in open mode.
Fig. 6 is the schematic representation that gas circuit is in closed condition.
Among the 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 subsequent use cavity volume of 10-auxiliary chamber; 11-elongate conduit; 12-ventilation module, dash area is a 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
Specify embodiments of the invention with reference to the accompanying drawings.
The pneumatic spring auxiliary chamber that is a kind of passenger vehicle with variable volume as shown in Figure 1 comprises auxiliary chamber cavity 2 and connecting pipeline 1, and auxiliary chamber cavity 2 closed ends are connected with the pneumatic spring body through connecting pipeline 1, and open end is through cover plate 8 sealings.Piston 3 is housed in the auxiliary chamber cavity 2, and piston thickness is 25mm, assembling piston rod 4 on the piston 3, and piston 3 is equipped with elongate conduit 11 near the surface of cover plate 8, and elongate conduit 11 coileds " snake " shape is fixed on the surface of 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 from left to right is followed successively by 40mm, 50mm, 70mm, 70mm, 50mm, 40mm and 30mm.Piston 3 is installed limiting stopper 5 with piston rod 4 joints, prevents to damage when piston motion extremely bottom elongate conduit 11.Symmetry is equipped with ventilation module 12 on the piston 3, and ventilation module 12 contacts with auxiliary chamber cavity 2, and has with respect to bigger frictional force between piston 3 and the auxiliary chamber cavity 2.As shown in Figure 3, have keyway A15 and keyway B17 on piston 3 and the contacted surface of ventilation module, positive stop key 24 is installed in the centre of surface position; And key C16 and key D18 are installed on the elongation line of keyway center line, have keyway C20 and keyway D22 on ventilation module 12 and the piston 3 contacted surfaces, and key A19 and key B21 are installed on the elongation line of keyway center line; Have spacing keyway 23 in the central position, keyway length is 18mm, and width is 5mm; Key length is 5mm; Width is 5mm, and the positive stop key slot length is 20mm, and width is 5mm.Cover plate 8 center drillings, piston rod 4 pass the back and through seal ring 6 hole are sealed from the hole of cover plate 8, guarantee the sealing that auxiliary chamber is whole.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 was static relatively, driving mechanism connection set 7 guaranteed that piston 3 rests on a certain position, did not have relative displacement between ventilation module 12 and the piston 3, gas circuit sealing as shown in Figure 3.When spring was in static state, piston 3 was divided into actual volume chamber 14 and subsequent use cavity volume 10 two-part with auxiliary chamber cavity 2.Elongate conduit 11 is communicated with piston 3 both sides cavitys through aperture passage 13, and actual volume chamber 14 is identical with subsequent use cavity volume 10 air pressure, has reduced the pressure of driving mechanism connection set 7, and the gas circuit on the assurance piston is opened Shi Buhui to spring generation impact.When pneumatic spring receives external excitation; Gas in the actual volume chamber 14 produces concussion, because the complicated bend shape of elongate conduit 11 and big slenderness ratio form Yong Sai, turbulent phenomenon when the gas stream of concussion is crossed elongate conduit 11; Produce the vapour lock effect; Separator piston both sides cavity has only 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 the ventilation module 12 less than the maximum static friction force between ventilation module 12 and the cavity 2, produces relative displacement between piston body 3 and the ventilation module 12; Skid off like the keyway A15 among Fig. 3, key D22 like the key D18 among Fig. 3, key A19, or skid off like the keyway B17 among Fig. 3, keyway C20 like the key C16 among Fig. 3, key B21, gas circuit is opened; Shown in the left figure of Fig. 4; Piston 3 both sides gas communications guarantee that two-part air pressure is identical in the piston motion process, in 14 change procedures of actual volume chamber; Can not produce compression shock, guarantee the stable of pneumatic spring height.Simultaneously, 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 cooperates with restraining groove 23 all the time, so after relative displacement reached certain value, the ventilation module can be dragged by piston.After ventilation module 12 moved to desired location, piston 3 is the motion certain distance round about, and gas circuit is closed, back stop motion.
In the 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 one by one.
Above practical implementation method purpose of description of the present invention is for example and explanation.They and not exclusively and its do not limit the invention to the clear and definite form that discloses.Obviously, according to top example, have many distortion and variation.The embodiment who more than selects and describe is principle and the practical application thereof for explanation invention best, thereby makes others skilled in the art can use the different embodiments of the various distortion of the present invention and various predetermined specific uses better.Scope of the present invention should be limited following claims and their equivalent.
The present invention is not limited to above-mentioned practical implementation method, and every employing similar algorithm of the present invention and similar variation all should be listed protection scope of the present invention in.
Claims (9)
1. the pneumatic spring auxiliary chamber of a variable volume; It is characterized in that, comprise 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 subsequent use cavity volume of auxiliary chamber (10), elongate conduit (11), ventilation module (12), little hole path (13), auxiliary chamber actual volume chamber (14), 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); Said auxiliary chamber cavity (2) one ends seal an end and open wide; Open end is through cover plate (8) sealing; The piston rod (4) that piston (3) is housed in the said auxiliary chamber cavity (2) and links to each other with piston (3), piston (3) outer rim symmetry is equipped with the ventilation module (12) identical with piston (3) thickness; On the said piston (3); Be provided with key (16,18) and keyway (15,17) with the contacted surface of ventilation module (12); On the said ventilation module (12); Be provided with key A (19), key B (21) and keyway A (15), keyway B (17) with the contacted surface of piston (3); Keyway C (20) on key C (16) on the said piston (3) and the ventilation module (12) cooperatively interacts; Keyway D (22) on key D (18) on the piston (3) and the ventilation module (12) cooperatively interacts, and key A (19) on the ventilation module (12) and the keyway A (15) on the piston (3) cooperatively interact, and key B (21) on the ventilation module (12) and piston (3) are gone up the keyway B (17) that sends out and cooperatively interacted; On piston (3) and the contacted surface of ventilation module (12), positive stop key (24) is installed, on ventilation module (12) and the contacted surface of piston (3), is provided with spacing keyway (23), positive stop key (24) and spacing keyway (23) cooperatively interact; Said piston (3) is equipped with elongate conduit (11) near the one side of cover plate (8); Offer little hole path (13) on the piston (3), little hole path (13) links to each other with elongate conduit (11); Said piston rod (4) passes cover plate (8) and is driven by the driving mechanism connection set (7) that connects driving mechanism, and said auxiliary chamber cavity (2) closed end is connected with pneumatic spring through connecting pipeline (1).
2. the pneumatic spring auxiliary chamber of variable volume according to claim 1; It is characterized in that; Said 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) with auxiliary chamber cavity (2) contact surface.
3. the pneumatic spring auxiliary chamber of variable volume according to claim 1 and 2; It is characterized in that; When piston (3) moved, the frictional force that the friction layer between auxiliary chamber cavity (2) and the ventilation module (12) produces made piston (3) and ventilation module (12) produce relative displacement, and said key A (19) slips into and skid off keyway A (15); Key B (21) slips into and skids off keyway B (17); Key C (16) slips into and skids off keyway C (20), and key D (18) slips into and skid off keyway D (22), can seal keyway when said key slips into keyway.
4. the pneumatic spring auxiliary chamber of variable volume according to claim 1 and 2; It is characterized in that; The center line of keyway C (20) on the ventilation module (12) and the central lines of the keyway B (17) on the piston (3), the central lines of the keyway A (15) on the center line of keyway D (22) and the piston (3); Ventilation module (12) goes up the center line of key A (19) and the central lines of keyway A (15); The central lines of the center line of key B (21) and keyway B (17); The center line of key C (16) on the piston (3) and the central lines of keyway C (20), the central lines of the center line of key D (18) and keyway D (22), key A (19) cooperates with keyway A (15); Key B (21) cooperates with keyway B (17); Key C (16) cooperates with keyway C (20), and key D (18) cooperates with keyway D (22), constitutes one group of gas circuit to be opened/closed that cooperatively interacts.
5. the pneumatic spring auxiliary chamber of variable volume according to claim 1 and 2 is characterized in that, the keyway on ventilation module (12) and the piston (3) is corresponding one by one, constitutes gas circuit; Half gas circuit in the gas circuit is opposite with the installation direction of second half gas circuit, and when the relative position of piston (3) and ventilation module (12) changed, a gas circuit was opened, and always has a gas circuit to keep shut.
6. the pneumatic spring auxiliary chamber of variable volume according to claim 5 is characterized in that, the length sum of two keyways that cooperatively interacts into a gas circuit is greater than two key length sums on the thickness of piston (3) and the gas circuit, and the width of keyway and key is identical.
7. the pneumatic spring auxiliary chamber of variable volume according to claim 1 and 2; It is characterized in that; The symmetry center of said spacing keyway (23) is positioned on the center line of piston, and positive stop key (24) skids off the stroke of keyway fully greater than two keys of every gas circuit to the stroke of other directions.
8. the pneumatic spring auxiliary chamber of variable volume according to claim 1 and 2 is characterized in that, said elongate conduit (11) slenderness ratio is 150 ~ 200, and coiled " snake " shape is fixed on the surface of piston (3).
9. the pneumatic spring auxiliary chamber of variable volume according to claim 1 and 2 is characterized in that, limiting stopper (5) is installed with piston rod (4) joint in said piston (3) below, protection elongate conduit (11).
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 true CN102606663A (en) | 2012-07-25 |
| CN102606663B CN102606663B (en) | 2014-02-12 |
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| CN201210075510.6A Expired - Fee Related CN102606663B (en) | 2012-03-21 | 2012-03-21 | Additional air chamber of volume-variable air spring |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105835649A (en) * | 2016-03-18 | 2016-08-10 | 江苏大学 | Oil-gas suspension with volume-variable additional gas chamber and control method of oil-gas suspension |
| CN106312606A (en) * | 2016-09-30 | 2017-01-11 | 中车南京浦镇车辆有限公司 | Chippings preventing tool for air spring holes of framework of railway vehicle |
| 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 |
| CN114278629A (en) * | 2021-11-24 | 2022-04-05 | 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 |
| CN115092062A (en) * | 2022-08-01 | 2022-09-23 | 深圳金源恒泰科技有限公司 | Vehicle-mounted system and device for positioning school bus safe track |
| WO2024098218A1 (en) * | 2022-11-07 | 2024-05-16 | 华为技术有限公司 | Air chamber, air spring, air suspension system, and vehicle |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105835649A (en) * | 2016-03-18 | 2016-08-10 | 江苏大学 | Oil-gas suspension with volume-variable additional gas chamber and control method of oil-gas suspension |
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| CN108730397A (en) * | 2018-06-26 | 2018-11-02 | 海南大学 | A kind of air spring additional air chamber of variable volume |
| CN114278629A (en) * | 2021-11-24 | 2022-04-05 | 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 |
| 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 |
| CN115092062A (en) * | 2022-08-01 | 2022-09-23 | 深圳金源恒泰科技有限公司 | Vehicle-mounted system and device for positioning school bus safe track |
| 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 |
| WO2024098218A1 (en) * | 2022-11-07 | 2024-05-16 | 华为技术有限公司 | Air chamber, air spring, air suspension system, and vehicle |
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| CN102606663B (en) | 2014-02-12 |
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