CN102588490A - Air spring - Google Patents
Air spring Download PDFInfo
- Publication number
- CN102588490A CN102588490A CN2011101292747A CN201110129274A CN102588490A CN 102588490 A CN102588490 A CN 102588490A CN 2011101292747 A CN2011101292747 A CN 2011101292747A CN 201110129274 A CN201110129274 A CN 201110129274A CN 102588490 A CN102588490 A CN 102588490A
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- limiting part
- lower panel
- displacement
- base plate
- pneumatic spring
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Abstract
The invention aims to provide an air spring capable of changing the maximum displacement, namely the spring characteristics, in the opposite horizontal direction between a lower panel and a bottom plate correspondingly without the need of decomposition or re-installing. The air spring comprises an upper panel; a lower panel; a cylindrical flexible member arranged across the upper panel and the lower panel; an elastic stopper installed on the lower panel; a through-hole formed on the lower panel; and a limitation member arranged on the bottom plate of the elastic stopper by being inserted into the through hole.
Description
Technical field
The present invention relates to employed pneumatic spring in a kind of railway vehicle etc.
Background technique
Current, as employed pneumatic springs such as railway vehicles, known its has: top plate, and it is installed on the vehicle body of vehicle; Lower panel, the below that it is positioned at top plate is configured in the chassis side; The flexible member of rubber system, it is across top plate and lower panel and dispose; And elastomeric stopper, it is installed between lower panel and the chassis.
To the internal feed air of flexible member and keep pressurized state.Pneumatic spring constitutes, and utilizes the flexible member and the elastomeric stopper that expand through forced air, to load or the swing or the yaw performance pooling feature of above-below direction.
But, since said pneumatic spring structurally the spring constant of substantially horizontal near linear, the power that therefore suppresses the relative substantially horizontal displacement between chassis and vehicle body a little less than.For this reason, at a high speed through under the situation of bend, therefore the bigger centrifugal force of effect on left and right directions and yaw becomes big guarantee that driving safety becomes a problem at vehicle.
In order to solve said problem, known a kind of pneumatic spring, it is like Fig. 6 and shown in Figure 7, with the displacement restriction of the left and right directions of elastomeric stopper in predetermined range and make non-linearization of spring constant of left and right directions, thereby can suppress the vehicle body yaw.
Fig. 6 is the sectional arrangement drawing that is filled with the pneumatic spring of air state in the expression flexible member 33, and left-half is represented the section of fore-and-aft direction, and right half part is represented the section of left and right directions.Pneumatic spring 30 has: top plate 31; Lower panel 32; Flexible member (bellows) 33, it disposes with lower panel 32 across top plate 31; And elastomeric stopper 34, it is installed between lower panel 32 and the chassis.
On the lower panel 32 of pneumatic spring 30, form the slotted hole 35 that extends along the vehicle fore-and-aft direction, on the base plate 36 of elastomeric stopper 34, erect and be provided with the limiting part 37 that front end inserts slotted hole 35.Elastomeric stopper 34 is used by rubber layer and the alternately laminated range upon range of rubber structure that forms of steel plate usually.
Like Fig. 6 and shown in Figure 7, limiting part 37 can form drum.As this pneumatic spring, the structure that known for example patent documentation 1 is put down in writing.In addition, as the shape of limiting part 37, also can be as shown in Figure 8, the curvature portion at the left and right directions two end part of cylinder is pruned and formed plane.Thus, the area of contact between the inner peripheral surface of limiting part 37 and slotted hole can be enlarged, the distortion of limiting part can be suppressed.As this pneumatic spring, the structure that known for example patent documentation 2 is put down in writing.
In pneumatic spring 30; If active force on the left and right directions of vehicle and make the relative substantially horizontal displacement between chassis and vehicle body surpass established amount, then limiting part contacts with the inner peripheral surface of slotted hole, and the spring constant of substantially horizontal uprises; That is non-linearization of spring constant.Thus, can guarantee the riding stability (high stability) of vehicle under at a high speed.
Patent documentation 1: japanese kokai publication hei 8-21475 communique
Patent documentation 2: TOHKEMY 2008-215455 communique
Summary of the invention
But in said pneumatic spring, in case limiting part is set, then the maximum displacement of the opposing horizontal direction displacement between lower panel and base plate just is fixed.Therefore; Corresponding with the situation of the route of vehicle driving and want to change under the situation of maximum displacement of the relative substantially horizontal displacement between lower panel and base plate; Need carry in lifting and place under the state of the vehicle body on the top plate; Pneumatic spring is decomposed and the replacing limiting part, perhaps change pneumatic spring.
Therefore; In the present invention; Its purpose is to provide a kind of pneumatic spring; It need not to decompose or the refitting pneumatic spring, can be through simple operation and the route of vehicle driving change accordingly the relative substantially horizontal displacement between lower panel and base plate maximum displacement, be spring performance, thereby address the above problem.
In order to solve said problem, pneumatic spring involved in the present invention is characterised in that to have: top plate; Lower panel; The flexible member of tubular, it is across said top plate and lower panel and dispose; Elastomeric stopper, it is installed on the said lower panel; Through hole, it is formed on the said lower panel; And limiting part; It is installed on the base plate of elastomeric stopper with the state that inserts said through hole; Between said lower panel and base plate along continuous straight runs displacement relatively during established amount; Contact with the inner peripheral surface of said through hole, the opposing horizontal direction displacement between said lower panel and the base plate (below, abbreviate " substantially horizontal displacement " sometimes as) is limited in the predetermined range; Said limiting part be set to change and the inner peripheral surface of said through hole between the contact position, can change the maximum displacement of substantially horizontal displacement through changing said contact position.
According to said structure; Need not corresponding and decompose time and again or the refitting pneumatic spring with the route that is gone; Only through the contact position between the change inner peripheral surface in the limiting part and through hole, just can and route change the maximum displacement of the opposing horizontal direction displacement between lower panel and base plate accordingly.
As pneumatic spring; In order to change the contact position between the inner peripheral surface in the limiting part and through hole; As long as constitute in the above and on the plate vent hole is set, on the central shaft that is formed on said vent hole on the said base plate, keep the holding part of said limiting part to get final product.When the contact position of change limiting part, the air of exhausting air spring inner is supported on the lower panel top plate, under this state, unloads the pipe arrangement that is connected with vent hole from interior of body, and vent hole is exposed.Since holding part be positioned at vent hole under, therefore as long as assembly tool that will be suitable inserts vent hole inside and limiting part is operated.
Specifically; As limiting part; The substantially horizontal section of the part that for example is set to contact with lower panel forms non-circular particular profile shape; And be provided with said limiting part can with respect to said base plate around central shaft change towards, through change said limiting part towards, can change the maximum displacement of substantially horizontal displacement.
In this case, can rotate with respect to base plate if be set to limiting part, then through make the assembly tool that inserts from vent hole with state that limiting part engages under be rotated, thereby can change limiting part towards.In addition, also limiting part is not set to and can rotates with respect to base plate, but for example makes the end of limiting part form the section square, on holding part, forms the recess that can engage with the end of limiting part.In this case, as long as utilize assembly tool that limiting part is gone out from Bao Chi Bu order, make limiting part around the central shaft rotation and change limiting part towards state under, the end of limiting part is engaged with recess gets final product.
In addition, also can make limiting part can with the restriction posture of substantially horizontal displacement restriction in predetermined range, conciliate to dewater square and between the releasing posture of the restriction of displacement, switch.In this case, remove posture through limiting part is formed, thereby can make linearization of spring constant, keep the riding comfort in the low speed route well.That is, can provide and pneumatic spring from each route corresponding spring characteristic of the paramount fast route of low speed route.
In addition; In order to make limiting part in the restriction posture with remove between the posture and switch, and for example can constitute, limiting part releasably is arranged on the base plate; Form the restriction posture during state on being installed on base plate, when the state that unloads from base plate, form and remove posture.
In addition,, also can constitute as limiting part, be set to state that base plate engages under can move, utilize limiting part can switch the restriction posture and remove posture with respect to the clamped position of base plate.Specifically; In order to make limiting part form the restriction posture; As long as and make limiting part keep with state that the engagement portion engages under rise towards top plate; In order to make limiting part form remove posture, as long as and make limiting part keep with state that the engagement portion engages under descend towards base plate.
The effect of invention
Pneumatic spring involved in the present invention; Owing to have limiting part; It is installed on the base plate of elastomeric stopper; Below the along continuous straight runs displacement relatively of plate and base plate during established amount, be formed at lower panel on the inner peripheral surface of through hole contact and with the opposing horizontal direction displacement restriction between lower panel and base plate in predetermined range, the contact position that is provided with between the inner peripheral surface in the limiting part and through hole can change; Can change the maximum displacement of substantially horizontal displacement through changing said contact position; Therefore, need not pneumatic spring is decomposed or resets, can change spring performance accordingly with the route that vehicle is gone through simple operation.
Description of drawings
Fig. 1 is the figure of the mode of execution of expression pneumatic spring of the present invention, is the sectional arrangement drawing that the expression limiting part forms the state of restriction posture.
Fig. 2 is the plan view that the pneumatic spring among Fig. 1 has been removed the state of top plate and flexible part.
Fig. 3 is that expression makes limiting part among Fig. 2 rotate the plan view of 90 ° state around central shaft.
Fig. 4 is the figure that the limiting part in the presentation graphs 1 forms the state of removing posture.
Fig. 5 is left and right directions displacement and the plotted curve of relation load between of expression in the pneumatic spring of the present invention.
Fig. 6 is the sectional arrangement drawing of the existing pneumatic spring of expression.
Fig. 7 be presentation graphs 6 limiting part and lower panel the part want portion's amplification plan view.
Fig. 8 is the figure of the form of the expression limiting part different with Fig. 7.
Embodiment
Below, based on accompanying drawing mode of execution of the present invention is described.Fig. 1～Fig. 4 is the figure of expression railway vehicle involved in the present invention with the mode of execution of pneumatic spring.Fig. 1 is the sectional arrangement drawing that limiting part forms the pneumatic spring of the state that limits posture; Fig. 2 is the plan view with the state after top plate among Fig. 1 and the flexible member removal; Fig. 3 makes the limiting part among Fig. 2 rotate the plan view of 90 ° state around central shaft, and Fig. 4 is the sectional arrangement drawing that the limiting part among Fig. 1 forms the pneumatic spring of the state of removing posture.In addition, in Fig. 1 and Fig. 4, with the A-A section among Fig. 2, be that the left-half of pneumatic spring illustrates with the section of fore-and-aft direction, the section of right half part with left and right directions illustrated.
Pneumatic spring has: top plate 1, and it is installed on the vehicle body of vehicle; Lower panel 2, the below that it is positioned at top plate is configured in the chassis side; The flexible member 3 of tubular, it disposes with lower panel 2 across top plate 1; And elastomeric stopper 4, it is installed between lower panel 2 and the chassis.In addition, in Fig. 1 and Fig. 4, the state after flexible member 3 interior air are discharged from is shown.
In this mode of execution, use rubber system bellows as flexible member 3.Flexible member 3 is made up of the range upon range of rubber of the reinforced stock layer that will be embedded with gut threads as the mesosphere; In the upper end portion and the underpart of flexible member 3, be formed with reinforcement edge (bead) 3a of portion, the 3b of the heavy wall that forms strengthening coiling reinforced stock layer on the edge core.That is, flexible member 3 has: strengthen the edge 3a of portion, 3b, it is formed on place, two end part up and down; And the bendable portion 3c of tubular, it is by being formed on that the range upon range of rubber of strengthening between the edge 3a of portion, the 3b constitutes and thin-walled ground forms.
As shown in Figure 1, top plate 1 has: discoid support plate 5, and it is a metallic; The reinforcement edge supporting portion 6 of drum, it is positioned at the central part of support plate 5, protrudes to lower panel; And protection rubber layer 7, it is positioned on the lower surface of support plate 5, is arranged on strengthening edge supporting portion 6 and compares the part place in the radial direction outside, and in strengthening edge supporting portion 6, embedding has the edge of the reinforcement 3a of portion.The central authorities of plate 1 are formed with the vent hole 10 of the air pressure inside that is used to regulate flexible member 3 in the above.
Like Fig. 1 and shown in Figure 2; Elastomeric stopper 4 has rubber layer that is made up of vulcanized rubber 11 and the back-up coat 12 alternately laminated range upon range of rubber section 15 that form that are made up of steel plate; In the top and the lower end, metal top board 13 and base plate 14 is bonding with range upon range of rubber section 15.Range upon range of rubber section 15 forms the cylindric of heavy wall.
It is discoid that lower panel 2 utilizes metallic material to form, and the top board 13 of elastomeric stopper 4 utilizes secure components such as bolt, nut to be fixed.Top board 13 forms circular.Lower panel 2 also has as the function of strengthening the edge supporting portion, and embedding in the plate 2 below has the edge of the reinforcement 3b of portion.
At the downside of strengthening the edge 3b of portion, rubber base 8 is installed along the shape of strengthening the edge 3b of portion.Rubber base 8 forms ring-type by rubber and reinforcing metalwork.Thus, can keep the durability of flexible member 3 well.
Strengthen edge and bear under portion 6 and the situation of lower panel 2 after the air of the inside of flexible member 3 is discharged (under the situation after the venting), strengthen edge supporting portion 6 and be supported on the lower panel 2, with the function of the safety traffic of guaranteeing vehicle.Be fastened with slip thin plate 9 respectively on the surface of contact that reinforcement edge supporting portion 6 and lower panel 2 contact when venting.
Slip thin plate 9 is made up of the thermoplasticity or the thermosetting synthetic resin that can be shaped as thin and tough and tensile thin plate, uses the little resin of friction factor.Specifically, can enumerate fluorine-type resin, polyethylene and polypropylene etc.In this mode of execution, use the fluorine-type resin thin plate.
The base plate 14 of elastomeric stopper 4 forms discoideus, and centre portion forms with the mode to the top protrusion with limiting part 16 cards holding part 17 only therein.Holding part 17 forms conical front end is cut the truncated cone shape that forms, and is fixed under the state in inserting range upon range of rubber section 15.In addition, holding part 17 is formed on the central shaft CA of vent hole 10 under the static state of pneumatic spring.
As shown in Figure 2, the central part of plate 2 is formed with through hole 18 below, and under the state that limiting part 16 and holding part 17 cards end, limiting part 16 is held with the state (restriction posture) that inserts in the through hole 18.Under the state of the power that does not have the exposure level direction on the pneumatic spring, as shown in the figure, limiting part 16 does not contact with the inner peripheral surface of through hole 18, is positioned at the center of through hole 18.And limiting part 16 is forming the releasing posture when holding part 17 unloads.
Through hole 18 forms the slotted hole of comparing the rectangular shape of on the fore-and-aft direction C of vehicle, growing with the left and right directions B of vehicle.Therefore; Form under the situation of restriction posture at limiting part 16; Even like vehicle start the time or when stopping this on the fore-and-aft direction of pneumatic spring active force, limiting part 16 does not contact with through hole 18 yet, can not limit the relative fore-and-aft direction displacement between lower panel 2 and the base plate 14.Thus, can keep good riding comfort to the swing of the fore-and-aft direction of vehicle.
On the other hand; When passing through bend with high speed, act under the situation of stronger power on this left and right directions at pneumatic spring like vehicle; When the relative left and right directions displacement amount of 14 of plate 2 and base plates reaches established amount (in Fig. 2, being length X) below; Limiting part 16 can contact with the inner peripheral surface of through hole 18, limits the displacement more than or equal to established amount, thereby makes non-linearization of spring constant.Thus, in the high speed route, can guarantee high stability.
Limiting part 16 is made up of the bolt of band hexagon ring, forms the tapped hole that can screw togather with limiting part 16 at the top of holding part 17.Limiting part 16 forms essentially rectangular at the substantially horizontal section of the part that contacts with lower surface 2.Therefore, the long limit of the rectangular section through making limiting part 16 or the left and right sides internal surface of minor face and through hole 18 are relative, thereby can change distance between limiting part 16 and the through hole 18, be the maximum displacement of substantially horizontal (left and right directions) displacement.
Specifically, as shown in Figure 2, the minor face through making limiting part 16 is relative with the left and right sides internal surface of through hole 18, thereby the distance between limiting part 16 and the through hole 18 (maximum displacement of left and right directions displacement) becomes X.On the other hand; As shown in Figure 3; If make limiting part 16 towards central shaft half-twist around limiting part, make that the left and right sides internal surface of long limit and through hole 18 of limiting part 16 is relative, then the distance between limiting part 16 and the through hole 18 becomes (maximum displacement of left and right directions displacement) Y.
The maximum displacement that under the high speed route, makes the left and right directions displacement is X, and the maximum displacement that under the middling speed route, makes the left and right directions displacement is Y (wherein, X＜Y).Thus, can change the spring performance of pneumatic spring accordingly with the route that vehicle is gone.
In addition, be used at vehicle under the situation of low speed route, limiting part 16 formed remove posture.Thus, not only under the situation of active force on the fore-and-aft direction of pneumatic spring, and under the situation of active force on the left and right directions of pneumatic spring, the opposing horizontal direction displacement that lower panel 2 and base plate are 14 can not be limited.Therefore, can make the spring constant linearization of the left and right directions of pneumatic spring, can relax vehicle effectively, can keep good riding comfort to the swing of direction all around with the swing of low speed when the bend.
Below, the method that in the pneumatic spring of said structure, changes spring performance is described.Under the situation that limiting part 16 and holding part 17 cards are ended, the air in the flexible member 3 is discharged, in that top plate 1 is supported under the state on the lower panel 2, will unload with the pipe arrangement that vent hole 10 is connected, vent hole 10 is exposed.And, as long as as shown in Figure 4, use suitable assembly tool, from the vent hole 10 of top plate 1 limiting part 16 is carried out charge and discharge operations with respect to holding part 17 and get final product.
As concrete example, as shown in Figure 4, can utilize at the front end of the hexagon wrench 19 of magnetic under the state of magnetic force absorption limiting part 16, from vent hole 10, insert hexagon wrench 19 and limiting part 16 and holding part 17 are screwed togather.
And, under the restriction posture, with limiting part 16 shown in Figure 2 towards and shown in Figure 3 towards between when switching, as long as the liner that uses packing ring etc. to have suitable thickness is adjusted.In addition, preferably in the assembly tool of performance constraint parts 16, be provided with expression limiting part 16 towards mark, thus can corresponding exactly limiting part 16 towards.
Remove postures for limiting part 16 is formed,, get final product limiting part 16 being adsorbed under the state on the hexagon wrench 19 take out to the outside from vent hole 10 as long as after using hexagon wrench 19 that limiting part 16 is taken off from holding part 17.
As stated, pneumatic spring involved in the present invention is applied in the vehicle, makes limiting part 16 form the restriction postures, thus on one side can through make non-linearization of spring constant change limiting part towards, thereby change spring performance.In addition, also can make linearization of spring constant through making limiting part 16 form the releasing posture.
Fig. 5 illustrates the displacement of the left and right directions of pneumatic spring and the relation between the load with plotted curve.In the drawings, No.1 be illustrated in restriction posture limit parts for Fig. 2 towards situation, No.2 be illustrated in restriction posture limit parts for Fig. 3 towards situation, No.3 illustrates the situation of removing posture.As shown in the figure, can through change limiting part towards the maximum displacement that change the left and right directions displacement, thereby change the spring performance of pneumatic spring.
In this mode of execution, be illustrated with respect to the mode that holding part 17 can freely be provided with to limiting part 16 with loading and unloading, but be not limited thereto, for example, limiting part 16 can't be unloaded from holding part 17, can only be with respect to holding part 17 rotations.Thus, though can't make linearization of characteristic of pneumatic spring, through under the restriction posture, change limiting part towards, then can change spring performance.In this case, through suitable ratchet mechanism is set, can fix or change limiting part 16 towards.
In addition; In this mode of execution; The mode towards the maximum displacement that changes the left and right directions displacement to through change limiting part 16 is illustrated, but is not limited thereto, for example; Also can holding part be set to and on the central shaft CA of vent hole 10, to move, change the maximum displacement of left and right directions displacement with respect to the position (highly) of lower panel 2 through limiting part.
Specifically, as limiting part, as long as use the parts that form vary in diameter on the central axis direction of limiting part.For example, can form the closer to the more little form of the forward end diameter of limiting part.And, move at the state lower edge central axis direction that engages with base plate through making limiting part, thereby can change the maximum displacement of left and right directions displacement.
Claims (5)
1. a pneumatic spring is characterized in that,
Have: top plate; Lower panel; The flexible member of tubular, it is across said top plate and lower panel and dispose; Elastomeric stopper, it is installed on the said lower panel; Through hole, it is formed on the said lower panel; And limiting part; It is installed on the base plate of elastomeric stopper with the state that inserts said through hole; Between said lower panel and base plate along continuous straight runs displacement relatively during established amount; Contact with the inner peripheral surface of said through hole, with the opposing horizontal direction displacement restriction between said lower panel and the base plate in predetermined range
Said limiting part be set to change and the inner peripheral surface of said through hole between the contact position, can change the maximum displacement of substantially horizontal displacement through changing said contact position.
2. pneumatic spring according to claim 1 is characterized in that,
On said top plate, vent hole is set, on said base plate, on the central shaft of said vent hole, is formed with the holding part that keeps said limiting part.
3. pneumatic spring according to claim 2 is characterized in that,
The substantially horizontal section that the part that said limiting part contacts with said lower panel is set is non-circular particular profile shape; And be provided with said limiting part can with respect to the change of said base plate around central shaft towards; Through change said limiting part towards, thereby change the maximum displacement of said substantially horizontal displacement.
4. pneumatic spring according to claim 3 is characterized in that,
Said limiting part can be provided with respect to said base plate rotatably.
5. pneumatic spring according to claim 3 is characterized in that,
Said limiting part can switch the restriction posture and remove the releasing posture of restriction of said substantially horizontal displacement between of the opposing horizontal direction displacement restriction between said lower panel and base plate in predetermined range.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-001904 | 2011-01-07 | ||
| JP2011001904A JP5584142B2 (en) | 2011-01-07 | 2011-01-07 | Air spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588490A true CN102588490A (en) | 2012-07-18 |
| CN102588490B CN102588490B (en) | 2015-07-15 |
Family
ID=46477578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110129274.7A Expired - Fee Related CN102588490B (en) | 2011-01-07 | 2011-05-18 | Air spring |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5584142B2 (en) |
| CN (1) | CN102588490B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821475A (en) * | 1994-07-07 | 1996-01-23 | Sumitomo Electric Ind Ltd | Air spring |
| JPH0989029A (en) * | 1995-09-27 | 1997-03-31 | Bridgestone Corp | Pneumatic spring having up-and-down moving stopper |
| US6257561B1 (en) * | 1998-07-16 | 2001-07-10 | Sumitomo Electric Industries, Ltd. | Air spring |
| JP2003254378A (en) * | 2002-03-04 | 2003-09-10 | Bridgestone Corp | Air spring |
| EP1726505A1 (en) * | 2005-05-25 | 2006-11-29 | Toyo Tire & Rubber Co. Ltd. | Air spring |
| CN101101030A (en) * | 2007-06-01 | 2008-01-09 | 成都飞机工业（集团）有限责任公司 | Air spring with stop and limit device |
| JP2008115959A (en) * | 2006-11-06 | 2008-05-22 | Bridgestone Corp | Air spring structure |
| JP2008215455A (en) * | 2007-03-02 | 2008-09-18 | Toyo Tire & Rubber Co Ltd | Air spring for railroad vehicle and its manufacturing method |
| JP2008303903A (en) * | 2007-06-05 | 2008-12-18 | Bridgestone Corp | Air spring device |
-
2011
- 2011-01-07 JP JP2011001904A patent/JP5584142B2/en not_active Expired - Fee Related
- 2011-05-18 CN CN201110129274.7A patent/CN102588490B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821475A (en) * | 1994-07-07 | 1996-01-23 | Sumitomo Electric Ind Ltd | Air spring |
| JPH0989029A (en) * | 1995-09-27 | 1997-03-31 | Bridgestone Corp | Pneumatic spring having up-and-down moving stopper |
| US6257561B1 (en) * | 1998-07-16 | 2001-07-10 | Sumitomo Electric Industries, Ltd. | Air spring |
| JP2003254378A (en) * | 2002-03-04 | 2003-09-10 | Bridgestone Corp | Air spring |
| EP1726505A1 (en) * | 2005-05-25 | 2006-11-29 | Toyo Tire & Rubber Co. Ltd. | Air spring |
| JP2008115959A (en) * | 2006-11-06 | 2008-05-22 | Bridgestone Corp | Air spring structure |
| JP2008215455A (en) * | 2007-03-02 | 2008-09-18 | Toyo Tire & Rubber Co Ltd | Air spring for railroad vehicle and its manufacturing method |
| CN101101030A (en) * | 2007-06-01 | 2008-01-09 | 成都飞机工业（集团）有限责任公司 | Air spring with stop and limit device |
| JP2008303903A (en) * | 2007-06-05 | 2008-12-18 | Bridgestone Corp | Air spring device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102588490B (en) | 2015-07-15 |
| JP2012145132A (en) | 2012-08-02 |
| JP5584142B2 (en) | 2014-09-03 |
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| CP02 | Change in the address of a patent holder | ||
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Address after: Hyogo Patentee after: Toyo Tire Rubber Address before: Osaka Patentee before: Toyo Tire Rubber |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190305 Address after: Osaka, Japan Patentee after: Neda Chemical Co., Ltd. Address before: Hyogo Patentee before: Toyo Tire Rubber |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20190518 |