CN104527703B - A kind of rail car axle box rear cover structure, axle box and axle box installation method - Google Patents
A kind of rail car axle box rear cover structure, axle box and axle box installation method Download PDFInfo
- Publication number
- CN104527703B CN104527703B CN201410712590.0A CN201410712590A CN104527703B CN 104527703 B CN104527703 B CN 104527703B CN 201410712590 A CN201410712590 A CN 201410712590A CN 104527703 B CN104527703 B CN 104527703B
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- China
- Prior art keywords
- bonnet
- axle box
- mounting seat
- rear cover
- rail car
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F15/00—Axle-boxes
- B61F15/20—Details
- B61F15/26—Covers; Sealing thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Sealing Of Bearings (AREA)
Abstract
The present invention relates to a kind of rail car axle box rear cover structure, axle box and axle box installation method, including protecgulum, casing, bonnet, bearing and positioning node, the center covered in the rear has axis hole, the mounting hole offered for fixed installation is covered in the rear, and the bonnet is formed by the relative connection that is fastened of the first bonnet and the second bonnet.Bonnet of the present invention uses split-type structural, and bonnet is fixedly connected to form by two relative the first bonnets being fastened and connected and the second bonnet, is conducive to the disassembly and assembly of repair and maintenance, time saving and energy saving, can greatly improve operating efficiency.
Description
Technical field
The present invention relates to a kind of rail car axle box, more particularly to a kind of rear cover structure of rail car axle box and use
The axle box of the rear cover structure, also relates to the installation method of the axle box, belongs to rail vehicle manufacturing technology field.
Background technology
Forward and backward two groups of wheels pair are installed on the bogie of rail vehicle, axle is set to the two ends of central rotating shaft in every group of wheel
Case, wheel pair and axle box are installed architecturally, take turns to axletree two ends pass through bearing, bearing is fixed in axle box.Axle box is by axle box
Body, protecgulum and bonnet composition, protecgulum and bonnet are fixedly connected by bolt with middle axle box respectively, in the centre bore of bonnet
Circle has to be tightly connected between sealing structure, with axletree.
Due to the limitation that vehicle is required in itself, journal box rear cover design space is narrow and small, such as using the bonnet of traditional integral type
Structure, structure space demand is larger so that the installation and removal of axle box are very inconvenient, waste time and energy, and operating efficiency is relatively low.
The content of the invention
Present invention is primarily aimed at solving the above problems with not enough there is provided a kind of easy installation and removal, work effect is improved
The rail car axle box rear cover structure of rate.
The main object of the present invention also resides in the axle box and axle box that operating efficiency is improved there is provided a kind of easy installation and removal
Installation method.
To achieve the above object, the technical scheme is that：
A kind of rail car axle box rear cover structure, including bonnet, the center covered in the rear has axis hole, covered in the rear
On offer mounting hole for fixed installation, the bonnet is by the first bonnet and the relative connection shape that is fastened of the second bonnet
Into.
Further, the docking site of first bonnet and the second bonnet is provided with the first mounting seat and second being engaged
Mounting seat, is fixedly connected between first mounting seat and the second mounting seat by fastener.
Further, the location structure of mutual cooperation is provided with first mounting seat and the second mounting seat.
Further, the location structure is the positioning convex being correspondingly arranged in first mounting seat and the second mounting seat
And locating groove.
Further, the bonnet includes back shroud and along the outwardly flange in axis hole periphery, first mounting seat and
Second mounting seat is arranged on the outside of the flange.
Further, it is provided with labyrinth sealing slot structure on the inwall of the bonnet central shaft hole.
Further, covered after first bonnet and/the second and be provided with outwardly lifting nose.
Further, the lifting nose and the first bonnet or the integrally manufactured shaping of the second bonnet.
The present invention another technical scheme be：
A kind of axle box, including protecgulum, casing, bonnet, bearing and positioning node, the bonnet are structures described above.
The present invention another technical scheme be：
A kind of installation method of axle box, comprises the following steps：
A, the first bonnet and the second bonnet be respectively fitted on axletree, carried out the first bonnet and the second bonnet with fastener
Pretension；
B, by bearing group mounted in axletree axle journal on；
C, casing is sleeved on bearing；
D, the first bonnet and the second bonnet further fastened, be assembled into complete bonnet；
E, push-in casing, make casing be adjacent to bonnet；
F, by installation bolt bonnet is fixedly connected with casing；
G, protecgulum is fixedly connected with casing.
To sum up content, a kind of rail car axle box rear cover structure of the present invention, axle box and axle box installation method are and existing
There is technology to compare, have the following advantages that：
(1) bonnet of the present invention uses split-type structural, and bonnet is after two relative the first bonnets and second being fastened and connected
Lid is fixedly connected to form, and is conducive to disassembly and assembly during repair and maintenance, time saving and energy saving, can greatly improve operating efficiency.
(2) covered after and be integrally formed lifting structure, the integral lifting function of bogie is realized using bonnet, eliminated existing
There is what is set in technology to be exclusively used in the structures such as the flap seat that bogie is lifted by crane, simplify the structure of bogie lifting, also save and turn
To the structure space of frame.
(3) effectively wheel and one make use of to be small space between journal box spring, it is journal box spring and car to have avoided one
The range of movement of wheel, makes structure compacter.
Brief description of the drawings
Fig. 1 is axle box structural representation of the present invention；
Fig. 2 is axle box structure sectional view of the present invention；
Fig. 3 is rear cover structure schematic diagram of the present invention；
Fig. 4 is rear cover structure sectional view of the present invention；
Fig. 5 is the structural representation after bonnet of the present invention is assembled with wheel to lifting；
Fig. 6 is present invention wheel to lifting structural representation.
As shown in Figures 1 to 6, casing 1, protecgulum 2, bonnet 3, the first bonnet 3a, the second bonnet 3b, bearing 4, positioning node
5, one is journal box spring 6, journal box spring mounting seat 7, installation portion 8, rubber blanket 9, through hole 10, boss 11, sealing ring 12, labyrinth type
Sealing structure 13, hub for vehicle wheel 14, axle journal 15, rear back-up ring 16, vertical damper mounting seat 17, lid 18, mounting flange 19 is opened
Mouth 20, cover plate 21, axis hole 22, mounting hole 23, the first mounting seat 24, the second mounting seat 25, bolt 26, back shroud 27, flange 28,
Cambered surface 29, positioning convex 30, locating groove 31, installation bolt 32, locking iron wire 33, protuberance 34 installs projection 35, installs recessed
Groove 36, axletree 37 lifts by crane nose 38, framework 39, flap seat 40, bolt 41, square orifice 42.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
As depicted in figs. 1 and 2, the invention provides a kind of axle box installed on the rail vehicle, including casing 1, protecgulum
2nd, bonnet 3, bearing 4 and positioning node 5, wherein, casing 1 is positioning arm formula casing, and the one of bogie is the bottom of journal box spring 6
It is fixed on casing 1, one is that the top of journal box spring 6 and the framework of bogie are fixed, bearing 4 is arranged on the inside of casing 1, axle
4 peripheries for being sleeved on axletree 37 are held, positioning node 5 is fixed with framework, and vertical damper mounting seat is additionally provided with casing 1
17, vertical damper mounting seat 17 is connected with vertical damper (not shown), and the top of vertical damper is connected with framework.
In the top of casing 1 journal box spring mounting seat 7 protruding upward, one is that journal box spring 6 uses double round steel springs, by
Inner spring and the outer spring composition connected together, one is that the centre bottom of journal box spring 6 has installation portion 8, and installation portion 8 passes through spiral shell
Nail is fixed in journal box spring mounting seat 7, and one is that rubber blanket 9 is provided between journal box spring 6 and casing 1, and rubber blanket 9 is above and below
Two metal foils and the rubber integrated vulcanizing of centre are formed.The center of rubber blanket 9 has through hole 10, journal box spring mounting seat 7
Passed from through hole 10, the downwardly projecting round ring boss 11 of bottom centre of installation portion 8, the part of boss 11, which is fixed, is scheduled on rubber
Between the inwall of the central through hole 10 of rubber cushion 9 and the outer wall of journal box spring mounting seat 7.
As shown in Fig. 2 protecgulum 2 is fixedly connected with the leading section of casing 1, protecgulum 2 is made up of lid 18 and mounting flange 19,
Mounting flange 19 is fixedly connected or is formed integrally with one end of lid 18, is fixed between protecgulum 2 and casing 1 by mounting flange 19
Link together.Opening 20 is provided with the sidepiece of protecgulum 2, a cover plate 21 is installed at opening 20, cover plate 21 is serum cap, used
Shaft end inner case is checked in when vehicle is put in storage, opening cover plate 21, abnormal appearance is detected the presence of.
As shown in Figure 2, Figure 3 and Figure 4, bonnet 3 is fixedly connected with the rearward end of casing 1, has axis hole at the center of bonnet 3
22, bonnet 3 includes back shroud 27, has outwardly flange 28 along the periphery of axis hole 22 in the outside of back shroud 27, in bonnet
The inner side of plate 27 has outwardly annular protuberance 34, back shroud 27, flange 28 and protuberance 34 along the periphery of axis hole 22
Be formed in one structure.
Offered on four angles of back shroud 27 four be used for be fixedly mounted mounting hole 23, at each mounting hole 23
Casing 1 is set to be fixed together with bonnet 3 by installation bolt 32.In order to prevent vehicle installation bolt 32 in the process of running
Loosen, locking iron wire 33 is installed in installation bolt 32.
Casing 1 and bonnet 3 are the part of geo-stationary, junction set static seal, back shroud 27, protuberance 34 with
The edge of casing 1 is stuck, and sets one to enclose O-ring seals 12 in the junction, realizes the sealing between bonnet 3 and casing 1,
Ensure two way seal inside and outside casing 1, prevent the foreign matters such as water, ash from entering.
Back-up ring 16 after being fixedly mounted one at the axle journal 15 of axletree 37, rear back-up ring 16 has dust-proof effect, rear back-up ring 16
It is interference fitted and fixes with axle journal 15, rear back-up ring 16 rotates at a high speed with axletree 37, bonnet 3 is stationary parts, in the axis hole 22 of bonnet 3
Inwall on be provided with labyrinth seal structure 13, between bonnet 3 and rear back-up ring 16 pass through labyrinth seal structure 13 realize fortune
State is sealed, and prevents bearing oil from revealing, and prevents foreign from entering, and realizes dynamic bidirectional sealing function.Back-up ring 16 afterwards
Outer surface has the annular installation projection 35 that outwardly section is in inverted L-shaped, correspondingly in the axis hole 22 of back shroud 27
The installation groove 36 of annular is provided with wall, raised 35 grafting is installed fixed and installing in groove 36, in the madial wall of axis hole 22 and
Three and two seal grooves (not indicated in figure) are respectively arranged with the madial wall for installing groove 36, sealing is installed in seal groove
Material, five seal grooves and sealing material formation labyrinth seal structure 13, sealing material and rear back-up ring 16 be brought into close contact to be formed bonnet 3 with
Sealing between axletree 37.
In the present embodiment, bonnet 3 is by the first bonnet 3a and the second bonnet 3b of symmetrical configuration with respect to the connection shape that is fastened
There is above-mentioned flange 28, protuberance 34 respectively on into, the first bonnet 3a and the second bonnet 3b and the structures such as groove 36 are installed.
First bonnet 3a and the second bonnet 3b docking site are provided with the first mounting seat 24 and second being engaged and installed
Seat 25, the first mounting seat 24 and the second mounting seat 25 are arranged on the upper and lower surfaces of bonnet 3, the first mounting seat 24 and the second peace
The bolt hole that dress seat 25 is oppositely arranged, it is solid by bolt 26 respectively between two the first mounting seats 24 and the second mounting seat 25 up and down
Fixed connection, and then realize that the first bonnet 3a's and the second bonnet 3b is fixedly connected to form complete bonnet 3.
In the present embodiment, the first mounting seat 24 and the second mounting seat 25 are arranged on to the outside of flange 28, back shroud 27
Brim height can so concede a motion for being journal box spring 6 less than the first mounting seat 24 and the height of the second mounting seat 25
Scope, in addition, the outer ring of flange 28, i.e., the side being connected with hub for vehicle wheel 14 has the cambered surface 29 concaved, has been conceded and car
The position that wheel hub 14 is contacted is taken turns, and there is a certain distance between the outside of bonnet 3 and hub for vehicle wheel 14.After this structure makes
The installation of lid 3 effectively make use of hub for vehicle wheel 14 and one to be the small space between journal box spring 6, not only make the first mounting seat
24 and second the installation of mounting seat 25 avoid a range of movement for being journal box spring 6 and hub for vehicle wheel 14, it is axle to relieve one
The space limitation of the sink-float of case spring 6, and more facilitates the installation and removal of bonnet 3, after removal during lid 3, by bonnet 3 to wheel
The direction of wheel hub 14 is moved a certain distance, and bonnet 3 is extracted out from casing 1, you can by the first bonnet 3a and the second bonnet 3b from car
The both sides of axle 37 are pulled down respectively, install then contrary to the above during bonnet 3.
Bonnet 3 uses split-type structural, is conducive to axle box in the disassembly and assembly of repair and maintenance, and bonnet 3 can be real
Now individually installation and removal, time saving and energy saving, can greatly improve operating efficiency during axle box installation and removal.Such as bonnet 3 with
When finding to have oil stain at axletree 37, it is possible to individually disassemble bonnet 3, see whether as labyrinth seal structure or match somebody with somebody
Position is closed to go wrong.In addition, bonnet 3 uses Split type structure, also facilitate dismounting bearing 4.In dismounting bearing 4 every time, all need
First bonnet 3 individually to be taken away because with bonnet 3 coordinate rear back-up ring 16 be must interference be pressed on axletree 37, Ran Houhou
The labyrinth seal structure of lid 3 and rear back-up ring 16 cooperatively form dynamic sealing, due to rear back-up ring 16 and bonnet 3 position relationship and
Structure space is limited, and when rear back-up ring 16 needs dismounting, it is desirable to have enough axial spaces, can be moved bonnet 3 backward
Side, is then backed off rear back-up ring 16 using frock, but the axle end of rail vehicle arrangement is blood sure can not possibly to allow
There is so long axial space and realize that only one is moved back to unload.So, preferable work is just served using split type bonnet 3
With, in dismounting, bonnet 3 is first separated into axletree 37, enough spaces are reserved, it is another then with drawing horse one end to withstand shaft end
Rear back-up ring 16 is held at end, and oil pump pressurization thus can together back off rear back-up ring 16 and bearing 4, convenient and swift.
As shown in figure 3, installing for convenience, it is ensured that installation accuracy, set in the first mounting seat 24 and the second mounting seat 25
It is equipped with the location structure of mutual cooperation.In the present embodiment, location structure is the convex being correspondingly arranged in the first mounting seat 24
30 and the locating groove 31 being arranged in the second mounting seat 25 are played, positioning convex 30 stretches out to side in the horizontal direction, bolt 26
It is fixedly connected from laterally through bolt hole.The location structure can prevent the relative fortune between the first bonnet 3a and the second bonnet 3b
It is dynamic, cause bolt 26 by shearing force, protection is played a part of to bolt 26.
As shown in figure 3, outwardly lifting nose 38 is provided with the first bonnet 3a, lifting nose 38 and first bonnet 3a
Integrally manufactured shaping, lifting nose 38 can also be arranged on the second bonnet 3b, can also be in the first bonnet 3a and the second bonnet 3b
Both sides respectively stretch out one.
As shown in figure 4, being fixedly connected with a flap seat 40 on the framework 39 of bogie, spiral shell is passed through between flap seat 40 and framework 39
Bolt 41 is fixedly connected, as shown in figure 5, offering a square orifice 42 on flap seat 40, lifting nose 38 is inserted into square orifice 42,
When usual vehicle is normally run, lifting nose 38 is located at the center of square orifice 42, is not contacted with flap seat 40, and is needing to bogie
During with wheel to integral lifting, bogie is lifted when moving up, and flap seat 40 is and then moved up, and makes lifting nose 38 and flap seat 40
Be abutted together, and then related lifting nose 38 and bonnet 3 are sling upwards together, realize bogie and wheel to integral lifting, section
Structure space is saved, it is safe and reliable.
In the present embodiment, the first mounting seat 24 and the second mounting seat 25 are arranged on the upper and lower surfaces of bonnet 3, and
The positioning convex 30 in two the first mounting seats 24 stretches out to side in the horizontal direction up and down, except with installation positioning function
Outside, vertical backstop and auxiliary lifting can also be played a part of in lifting, the first bonnet 3a and the second bonnet 3b can be prevented
Between relative motion, cause bolt 26 by shearing force, protection played a part of to bolt 26.
The installation method of axle box is described below in detail, following steps are specifically included：
A, the first bonnet 3a and the second bonnet 3b be respectively fitted on axletree 37, with two bolts 26 by the first bonnet 3a and
Second bonnet 3b carries out pretension.
B, bearing 4 is assembled on the axle journal 15 of axletree 37.
C, casing 1 is sleeved on bearing 4.
D, two bolts 26 further fastening up and down by the first bonnet 3a and the second bonnet 3b, are assembled into complete bonnet
3。
E, push-in casing 1, make casing 1 be adjacent to bonnet 3, now sealing ring 12, which is compacted, realizes between casing 1 and bonnet 3
Sealing, is tightly connected by labyrinth seal structure 13 between rear back-up ring 16 and bonnet 3, realized between bonnet 3 and axletree 37
Sealing.
F, by installation bolt 32 bonnet 3 is fixedly connected with casing 1, then finally installs locking iron wire 33.
G, protecgulum 2 is fixed together with casing 1 by mounting flange 19.
The method for dismounting of axle box is described below in detail, following steps are specifically included：
A, protecgulum 2 disassembled from casing 1.
B, four installation bolts 32 on bonnet 3 are screwed out.
C, successively dismounting casing 1 and bearing 4.
D, two bolts 26 in the first mounting seat 24 and the second mounting seat 25 are disassembled again, by the first bonnet 3a and
Second bonnet 3b takes apart respectively to both sides, completes bonnet 3 and dismantles.
When needing individually to pull down bonnet 3 or need first to dismantle bonnet 3, first four installation bolts 32 on bonnet 3 are screwed out,
First bonnet 3a and the second bonnet 3b are moved a certain distance to the direction of hub for vehicle wheel 14, by the protuberance 34 of bonnet 3 from casing 1
It is middle to extract out, then the first bonnet 3a and the second bonnet 3b two bolts 26 up and down are outwarded winding, finally by the first bonnet 3a and second
Bonnet 3b is pulled down respectively from the both sides of axletree 37, that is, completes the independent dismounting of bonnet 3.
As described above, the plan content with reference to given by accompanying drawing, can derive similar technical scheme.In every case it is not de-
From the content of technical solution of the present invention, any simple modification made according to technical spirit of the invention to above example, etc.
With change and modification, in the range of still falling within technical solution of the present invention.
Claims (8)
1. a kind of rail car axle box rear cover structure, including bonnet, the center covered in the rear has axis hole, covered in the rear
Offer the mounting hole for fixed installation, it is characterised in that：The bonnet is fastened admittedly by the first bonnet and the second bonnet are relative
Fixed connection is formed, and is covered after first bonnet or second and is provided with lifting nose outwardly in the horizontal direction, is being turned to
Flap seat is fixedly connected with the framework of frame, a square orifice is offered on flap seat, lifting nose is inserted into square orifice, normal in vehicle
During operation, the lifting nose is located at the center of square orifice, when bogie is lifted, and the lifting nose is resisted against one with flap seat
Rise.
2. rail car axle box rear cover structure according to claim 1, it is characterised in that：After first bonnet and second
The docking site of lid is provided with the first mounting seat and the second mounting seat being engaged, first mounting seat and the second mounting seat it
Between be fixedly connected by fastener.
3. rail car axle box rear cover structure according to claim 2, it is characterised in that：In first mounting seat and
The location structure of mutual cooperation is provided with two mounting seats.
4. rail car axle box rear cover structure according to claim 3, it is characterised in that：The location structure sets for correspondence
Put the positioning convex and locating groove in first mounting seat and the second mounting seat.
5. rail car axle box rear cover structure according to claim 2, it is characterised in that：The bonnet include back shroud and
Along the outwardly flange in axis hole periphery, first mounting seat and the second mounting seat are arranged on the outside of the flange.
6. rail car axle box rear cover structure according to claim 1, it is characterised in that：The bonnet central shaft hole it is interior
Labyrinth sealing slot structure is provided with wall.
7. rail car axle box rear cover structure according to claim 1, it is characterised in that：The lifting nose and the first bonnet
Or the second integrally manufactured shaping of bonnet.
8. a kind of axle box, including protecgulum, casing, bonnet, bearing and positioning node, it is characterised in that：The bonnet is such as right
It is required that the structure described in any one of 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712590.0A CN104527703B (en) | 2014-11-28 | 2014-11-28 | A kind of rail car axle box rear cover structure, axle box and axle box installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712590.0A CN104527703B (en) | 2014-11-28 | 2014-11-28 | A kind of rail car axle box rear cover structure, axle box and axle box installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104527703A CN104527703A (en) | 2015-04-22 |
| CN104527703B true CN104527703B (en) | 2017-10-31 |
Family
ID=52843418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410712590.0A Active CN104527703B (en) | 2014-11-28 | 2014-11-28 | A kind of rail car axle box rear cover structure, axle box and axle box installation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104527703B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109178014B (en) * | 2018-08-08 | 2022-03-29 | 中车青岛四方机车车辆股份有限公司 | Wheel set lifting device and bogie with same |
| CN112622970A (en) * | 2020-12-29 | 2021-04-09 | 济南巨鑫机车车辆配件有限公司 | Positioning device for K2 bearing saddle |
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| JPH11315843A (en) * | 1998-05-06 | 1999-11-16 | Nachi Fujikoshi Corp | Shaft seal device |
| CN201214429Y (en) * | 2008-08-05 | 2009-04-01 | 铁道部运输局 | Axle-box with self-sealing bearing and baffle edge |
| CN201769828U (en) * | 2010-08-28 | 2011-03-23 | 中国北车集团大连机车车辆有限公司 | Rolling axle suspension bearing box for bogie |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2516416Y (en) * | 2002-01-06 | 2002-10-16 | 郑州铁路新科机车车辆配件有限公司 | Locomotive gearbox with end sealed |
| CN2720193Y (en) * | 2004-08-09 | 2005-08-24 | 李福山 | Anti-theft sealing end cap of speed-reducing box bush |
| CN202743261U (en) * | 2012-09-07 | 2013-02-20 | 株洲奥凯精密机电有限公司 | Locomotive gearbox |
| DE112013006872T5 (en) * | 2013-03-27 | 2015-12-24 | Aktiebolaget Skf | hub unit |
| CN203580983U (en) * | 2013-10-25 | 2014-05-07 | 广州电力机车有限公司 | Shaft box end cover for eight-shaft electric locomotive steering frame |
| CN203888819U (en) * | 2014-06-19 | 2014-10-22 | 南车株洲电力机车有限公司 | Urban rail vehicle steering frame shaft box end cover |
| CN204279473U (en) * | 2014-11-28 | 2015-04-22 | 南车青岛四方机车车辆股份有限公司 | A kind of rail car axle box rear cover structure and axle box |
-
2014
- 2014-11-28 CN CN201410712590.0A patent/CN104527703B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11315843A (en) * | 1998-05-06 | 1999-11-16 | Nachi Fujikoshi Corp | Shaft seal device |
| CN201214429Y (en) * | 2008-08-05 | 2009-04-01 | 铁道部运输局 | Axle-box with self-sealing bearing and baffle edge |
| CN201769828U (en) * | 2010-08-28 | 2011-03-23 | 中国北车集团大连机车车辆有限公司 | Rolling axle suspension bearing box for bogie |
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| Publication number | Publication date |
|---|---|
| CN104527703A (en) | 2015-04-22 |
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| CB02 | Change of applicant information |
Address after: Jihongtan town Chengyang District Shandong city Qingdao province Jinhong road 266111 No. 88 Applicant after: CRRC QINGDAO SIFANG CO., LTD. Address before: Jihongtan town Chengyang District Shandong city Qingdao province Jinhong road 266111 No. 88 Applicant before: CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. |
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