CN106246734A - A kind of railway locomotive derailing device seals structure and implementation method - Google Patents
A kind of railway locomotive derailing device seals structure and implementation method Download PDFInfo
- Publication number
- CN106246734A CN106246734A CN201610630814.2A CN201610630814A CN106246734A CN 106246734 A CN106246734 A CN 106246734A CN 201610630814 A CN201610630814 A CN 201610630814A CN 106246734 A CN106246734 A CN 106246734A
- Authority
- CN
- China
- Prior art keywords
- bearing
- seal ring
- derailing
- railway locomotive
- wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- 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
- B61F9/00—Rail vehicles characterised by means for preventing derailing, e.g. by use of guide wheels
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The present invention provides a kind of railway locomotive derailing device to seal structure and implementation method, described anti-derail unit seals structure and includes that derailing takes turns (2), support shaft (3), bearing (8) and joint gland (10) and exterior seal ring (12), relatively turnable flexible connection is formed by bearing (8) between described derailing wheel (2) and support shaft (3), described joint gland (10) is fixedly connected on derailing wheel (2) outside and covers bearing (8) outside, described exterior seal ring (12) is fixedly connected on derailing wheel (2) inner side and covers bearing (8) inner side.The foreign material such as the dust storm in external elements, rainwater can be effectively stoped to enter into bearing (8) by the present invention internal, guarantee the normal work and use life-span of bearing (8), thus improve the overall working life of anti-derail unit and the reliability of derailing performance.
Description
Technical field
The present invention relates to railway locomotive derailing technical field, especially relate to a kind of railway locomotive derailing device and seal
Structure and implementation method.
Background technology
When railroad locomotive running is on rail, when especially rolling stock runs on overhead railway line, in order to anti-
The only generation of vehicle derailing, needs rolling stock to install anti-derail unit to ensure the automatic rerail of rolling stock and can just maintain additional
Often run.The structure of existing railway locomotive derailing device as shown in Figure 1 and Figure 2, mainly include derailing wheel 2, support shaft 3,
Installing rack 5 and bearing 8, wherein, form relatively turnable flexible connection, described support between described installing rack 5 and axletree 6
Axle 3 is fixedly connected on bottom installing rack 5 by connecting bolt, consists of bearing 8 between described derailing wheel 2 and support shaft 3
Relatively turnable flexible connection.
When the wheel 7 of rail vehicles runs along rail 4, the anti-derail unit of its both sides is to be exposed to nature ring
In border, and natural environment residing during railroad locomotive running varies, and such as, some circuit locations dust storm is relatively
Greatly, the rainwater of some circuit locations is more, etc., the foreign material such as dust storm in these external elements, rainwater are easy to
Entering into inside anti-derail unit, the final normal work giving anti-derail unit brings adverse effect, thus reduces derailing
The working life of device entirety and the reliability of derailing performance.
Summary of the invention
The technical problem to be solved in the present invention is: the problem existed for prior art, it is provided that a kind of railway locomotive anticreep
Rail device seals structure and implementation method, and the foreign material such as the dust storm being effectively prevented in external elements, rainwater enter into anticreep
Inside rail device.
The technical problem to be solved in the present invention realizes by the following technical solutions: a kind of railway locomotive derailing device is close
Seal structure, including derailing wheel, support shaft, bearing and joint gland and exterior seal ring, described derailing wheel and support shaft
Between form relatively turnable flexible connection by bearing, described joint gland be fixedly connected on derailing wheel outside and cover
Outside bearing, described exterior seal ring is fixedly connected on inside derailing wheel and covers inside bearing.
Preferably, also including axial compression lid, between described axial compression lid and bearing, support shaft, composition seals structure.
Preferably, also include that inner seal ring, described inner seal ring are arranged between bearing and exterior seal ring.
Preferably, described inner seal ring, exterior seal ring are respectively provided with double wedge, groove, and are positioned on inner seal ring
Double wedge engages each other with the groove being positioned on exterior seal ring, the groove being positioned on inner seal ring and the double wedge being positioned on exterior seal ring
Engage each other.
Preferably, it is interference fit between endoporus and the support shaft of described inner seal ring.
Preferably, the double wedge on described inner seal ring, exterior seal ring, groove are wedge shape double wedge, wedge-shaped impression respectively.
Preferably, the double wedge on described inner seal ring, exterior seal ring, groove are rectangle double wedge, rectangular recess respectively.
Preferably, it is matched in clearance between outer ring and the derailing wheel of described bearing.
A kind of railway locomotive derailing device seals structure implementation method, comprises the steps:
1st step, is fixedly installed to bearing in support shaft；
2nd step, installs to derailing wheel case outside bearing；
3rd step, is respectively and fixedly installed to derailing wheel opposite sides, and described joint pressure by joint gland, exterior seal ring
Lid, exterior seal ring, derailing wheel is coated with bearing jointly.
Preferably, the inner ring of described bearing first uses oil bath or Electromagnetic Heating to 90-100 DEG C, then is fixedly installed to
On support axle.
Compared with prior art, the invention has the beneficial effects as follows: owing to have employed joint gland, exterior seal ring is fixed respectively
It is connected to the opposite sides of derailing wheel, and makes joint gland, exterior seal ring jointly be coated with bearing with derailing wheel, such that it is able to
The foreign material such as the dust storm in external elements, rainwater are effectively stoped to enter into Bearing inner, it is ensured that the normal work of bearing
And service life, be conducive to improving the overall working life of anti-derail unit and the reliability of derailing performance.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of existing railway locomotive derailing device.
Fig. 2 is one railway locomotive derailing device sealed structural representation (A portion enlarged drawing in Fig. 1) of the present invention.
Labelling in figure: 1-sleeper beam, 2-derailing wheel, 3-support shaft, 4-rail, 5-installing rack, 6-axletree, 7-wheel, 8-
Bearing, 9-axial compression lid, 10-joint gland, 11-connecting bolt, 12-exterior seal ring, 13-inner seal ring, the 31-shaft shoulder.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawings and be embodied as
The present invention is described in detail for example.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
A kind of railway locomotive derailing device as shown in Figure 1 and Figure 2 seals structure, mainly includes derailing wheel 2, supports
Axle 3, bearing 8 and joint gland 10 and exterior seal ring 12, wherein, with mistake between one end and bearing 8 endoporus of described support shaft 3
The fit system that is full of is fixing to be connected, and the other end is bolted to connection with installing rack 5；Described derailing wheel 2 is sleeved on bearing 8
Periphery；Described joint gland 10 is fixedly connected on outside derailing wheel 2 by connecting bolt 11 and covers outside bearing 8
Side；Described exterior seal ring 12 is fixedly connected on inside derailing wheel 2 by connecting bolt 11 and covers inside bearing 8, thus
Make to constitute relatively turnable flexible connection by bearing 8 between derailing wheel 2 and support shaft 3, and, by joint gland
10, exterior seal ring 12 and derailing wheel 2 cladding bearing 8 jointly, define the sealing structure of anti-derail unit.
As it is shown in figure 1, when railway locomotive wheel 7 along rail 4 properly functioning time, its both sides derailing wheel 2 equal positions
Below sleeper beam 1 and and sleeper beam 1 between keep suitable gap.Generally, between described derailing wheel 2 and sleeper beam 1 lower plane
Gap design gives in accordance with the following methods: by the dynamics calculation of locomotive, it is considered to locomotive is under applicable line condition, not
When passing through at different rates in same sweep, the maximum vertical deviation of anti-derail unit is a, and considers that sleeper beam is put down for 1 time
Face is b with the foozle of rail 4 end face spacing, then the gap between derailing wheel 2 and sleeper beam 1 lower plane is designed as: a+b
+ (1～2mm).Owing to the anti-derail unit of railway locomotive both sides is all exposed in natural environment, therefore, pass through anti-derail unit
Sealing structure can effectively to stop the foreign material such as the dust storm in external elements, rainwater to enter into bearing 8 internal, thus protect
Demonstrate,prove the normal work and use life-span of bearing 8.
As in figure 2 it is shown, increase the axial compression lid 9 arranging T-shaped hierarchic structure outside support shaft 3, described axial compression lid 9 and support
Connected fixing between axle 3 by connecting bolt 11, the lobe on described axial compression lid 9 extend in bearing 8 endoporus, axial compression lid 9
Circumferential ends then seal compression bearing 8 inner ring, therefore, between described axial compression lid 9, bearing 8, support shaft 3, also constitute one
Individual sealing structure, to prevent the foreign material such as dust storm, rainwater from entering in the cavity between support shaft 3 and bearing 8.
In order to improve exterior seal ring 12 to bearing 8, the sealing property of support shaft 3, as in figure 2 it is shown, can be at bearing 8 with outer
Inner seal ring 13 is set between sealing ring 12, solid with interference fit between endoporus and the support shaft 3 of described inner seal ring 13
Fixed connection.Can also arrange the shaft shoulder 31 in support shaft 3, described inner seal ring 13 is fixedly mounted between the shaft shoulder 31 and bearing 8,
Inner seal ring 13 can be limited by the shaft shoulder 31 to move right relative to exterior seal ring 12, not only compact conformation, so that
Suitable gap is kept, to ensure to relatively rotate between derailing wheel 2 and support shaft 3 between exterior seal ring 12 and inner seal ring 13
Smoothness.The sealing property reliability of structure is sealed in order to improve anti-derail unit further, as in figure 2 it is shown, including can
Be respectively provided with rectangle double wedge, rectangular recess on sealing ring 13, exterior seal ring 12, and the rectangle double wedge being positioned on inner seal ring 13 with
The rectangular recess being positioned on exterior seal ring 12 engages each other, the rectangular recess being positioned on inner seal ring 13 be positioned at exterior seal ring 12
On rectangle double wedge engage each other, this sealing structure not only seals reliably, and handling ease, advantageously reduces inner seal ring
13, the production cost of exterior seal ring 12.Double wedge, groove on described inner seal ring 13, exterior seal ring 12 can also be wedges respectively
Shape double wedge, wedge-shaped impression, this wedge structure has certain guide effect, makes between inner seal ring 13, exterior seal ring 12
Relatively rotate more smooth and easy and seal reliable, it addition, this wedge structure can also make to enter in double wedge, engagement space
Pollute impurity to accelerate to flow out anti-derail unit sealing structure, thus the pollution impurity entered in double wedge, engagement space is risen
Arrive certain automatic cleaning effect, advantageously ensure that the normal work of bearing 8.
Above-mentioned railway locomotive derailing device seals structure and following steps can be used to realize:
First, inner seal ring 13 is installed；Described inner seal ring 13 uses between press-fit approach and support shaft 3 with interference fit
Mode is fixing to be connected, and makes the inner seal ring 13 shaft shoulder 31 in support shaft 3.
Then, bearing 8 is fixedly installed in support shaft 3 with interference fit；Described bearing 8 inner ring uses hot charging side
Formula is installed to the correct position in support shaft 3, preferably against inner seal ring 13.Before hot charging, the inner ring of bearing 8 is first used
Oil bath or Electromagnetic Heating are to 90-100 DEG C, then are installed in support shaft 3 specify position, and compress inner seal ring 13.
Secondly, axial compression lid 9 is installed；Use connecting bolt 11 fixing by being connected between axial compression lid 9 with support shaft 3, and make axle
Gland 9 circumferential ends seals, compresses outside bearing 8 inner ring.By inner seal ring 13 against the shaft shoulder 31, axial compression lid 9 and support shaft 3
Connect fixing, jointly limit moving axially of bearing 8 inner ring, to ensure the reliability of railway locomotive derailing device.
It follows that derailing wheel 2 set is installed to outside bearing 8.Described derailing is taken turns between 2 and bearing 8 outer ring best
It is set with gap fiting mode, the most easy for installation, it is often more important that, in railway locomotive running, if because of partially
Corner is excessive and causes between derailing wheel 2 and sleeper beam 1 lower plane when producing mutual squeezing action power, due to derailing wheel 2 with
Bearing 8 is matched in clearance between outer ring, therefore so that derailing wheel 2, bearing 8 all can obtain a certain degree of buffering, thus
Derailing wheel 2, bearing 8 are played certain protective effect；It addition, when railway locomotive is properly functioning, or deflection angle is less
Time, mutual squeezing action power will not be produced between derailing wheel 2 and sleeper beam 1 lower plane, therefore, derailing wheel 2 is relative to sleeper beam
1, derailing wheel 2 all will not relatively rotate relative to support shaft 3 relative to bearing 8, derailing wheel 2, thus alleviate anti-
It is energy-saving and cost-reducing that derailing wheel 2, the frictional dissipation of bearing 8, beneficially railway locomotive run.
Finally, joint gland 10 and exterior seal ring 12 are installed；Described joint gland 10 is fixed by connecting bolt 11
It is connected on the left of derailing wheel 2, described exterior seal ring 12 is fixedly connected on the right side of derailing wheel 2 by connecting bolt 11,
Described joint gland 10, exterior seal ring 12, derailing wheel 2 cladding bearings 8 jointly, as shown in Figure 2.So far, preventing railway locomotive
The sealing structure of derailing device completes.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, it is noted that all
Any amendment, equivalent and the improvement etc. made within the spirit and principles in the present invention, should be included in the guarantor of the present invention
Within the scope of protecting.
Claims (10)
1. railway locomotive derailing device seals a structure, including derailing wheel (2), support shaft (3) and bearing (8), described
Derailing wheel (2) and support shaft (3) between form relatively turnable flexible connection by bearing (8), it is characterised in that: and also
Including joint gland (10) and exterior seal ring (12), described joint gland (10) is fixedly connected on derailing wheel (2) outside and covers
Lid bearing (8) outside, described exterior seal ring (12) is fixedly connected on derailing wheel (2) inner side and covers bearing (8) inner side.
A kind of railway locomotive derailing device the most according to claim 1 seals structure, it is characterised in that: also include axial compression
Lid (9), between described axial compression lid (9) and bearing (8), support shaft (3), composition seals structure.
3. seal structure according to a kind of railway locomotive derailing device described in claims 1 or 2, it is characterised in that: also wrap
Including inner seal ring (13), described inner seal ring (13) is arranged between bearing (8) and exterior seal ring (12).
A kind of railway locomotive derailing device the most according to claim 3 seals structure, it is characterised in that: described is interior close
Be respectively provided with double wedge, groove on seal (13), exterior seal ring (12), and the double wedge being positioned on inner seal ring (13) be positioned at outer close
Groove in seal (12) engages each other, the groove being positioned on inner seal ring (13) and the double wedge phase being positioned on exterior seal ring (12)
Engagement mutually.
A kind of railway locomotive derailing device the most according to claim 3 seals structure, it is characterised in that: described interior sealing
It is interference fit between endoporus and the support shaft (3) of circle (13).
6. seal structure according to a kind of railway locomotive derailing device described in claim 4 or 5, it is characterised in that: described
Double wedge, groove on inner seal ring (13), exterior seal ring (12) are wedge shape double wedge, wedge-shaped impression respectively.
7. seal structure according to a kind of railway locomotive derailing device described in claim 4 or 5, it is characterised in that: described
Double wedge, groove on inner seal ring (13), exterior seal ring (12) are rectangle double wedge, rectangular recess respectively.
8. seal structure according to a kind of railway locomotive derailing device described in claims 1 or 2, it is characterised in that: described
It is matched in clearance between the outer ring of bearing (8) and derailing wheel (2).
9. a railway locomotive derailing device seals structure implementation method, it is characterised in that: comprise the steps:
1st step, is fixedly installed to bearing (8) in support shaft (3)；
2nd step, installs to bearing (8) outside by derailing wheel (2) set；
3rd step, is respectively and fixedly installed to derailing wheel (2) opposite sides by joint gland (10), exterior seal ring (12), and described
Joint gland (10), exterior seal ring (12), derailing wheel (2) are coated with bearing (8) jointly.
A kind of railway locomotive derailing device the most according to claim 9 seals structure implementation method, it is characterised in that:
The inner ring of described bearing (8) first uses oil bath or Electromagnetic Heating to 90-100 DEG C, then is fixedly installed in support shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630814.2A CN106246734A (en) | 2016-08-02 | 2016-08-02 | A kind of railway locomotive derailing device seals structure and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630814.2A CN106246734A (en) | 2016-08-02 | 2016-08-02 | A kind of railway locomotive derailing device seals structure and implementation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106246734A true CN106246734A (en) | 2016-12-21 |
Family
ID=58077590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630814.2A Pending CN106246734A (en) | 2016-08-02 | 2016-08-02 | A kind of railway locomotive derailing device seals structure and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106246734A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111016948A (en) * | 2019-12-20 | 2020-04-17 | 重庆艾博瑞威轨道交通设备有限公司 | Anti-tipping device of toothed rail sightseeing train |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070119333A1 (en) * | 2003-10-02 | 2007-05-31 | Societe Europeenne D'ingenierie Mecanique - Eurodim | System for guiding a vehicle along at least one guiding rail |
| CN101229812A (en) * | 2007-03-16 | 2008-07-30 | 黄金伦 | Train derailing prevention |
| CN202867576U (en) * | 2012-09-25 | 2013-04-10 | 济钢集团有限公司 | Device for sealing bearing seat of roller for rolling mill |
| CN203130812U (en) * | 2013-04-12 | 2013-08-14 | 丁建清 | Bearing device |
| CN104389909A (en) * | 2014-11-03 | 2015-03-04 | 章丘华明水泥有限公司 | Lower sprocket wheel bearing seal structure of NE-series hoister |
| CN204419871U (en) * | 2014-11-10 | 2015-06-24 | 张玉涛 | A kind of associated sealing arrangement for bearings |
| CN105197051A (en) * | 2015-10-16 | 2015-12-30 | 南车资阳机车有限公司 | Anti-derailment rubber wheel for railway vehicle |
| CN105292163A (en) * | 2015-10-30 | 2016-02-03 | 南车资阳机车有限公司 | Railway rolling stock derailment preventing equipment |
| CN205836833U (en) * | 2016-08-02 | 2016-12-28 | 中车资阳机车有限公司 | A kind of railway locomotive derailing device seals structure |
-
2016
- 2016-08-02 CN CN201610630814.2A patent/CN106246734A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070119333A1 (en) * | 2003-10-02 | 2007-05-31 | Societe Europeenne D'ingenierie Mecanique - Eurodim | System for guiding a vehicle along at least one guiding rail |
| CN101229812A (en) * | 2007-03-16 | 2008-07-30 | 黄金伦 | Train derailing prevention |
| CN202867576U (en) * | 2012-09-25 | 2013-04-10 | 济钢集团有限公司 | Device for sealing bearing seat of roller for rolling mill |
| CN203130812U (en) * | 2013-04-12 | 2013-08-14 | 丁建清 | Bearing device |
| CN104389909A (en) * | 2014-11-03 | 2015-03-04 | 章丘华明水泥有限公司 | Lower sprocket wheel bearing seal structure of NE-series hoister |
| CN204419871U (en) * | 2014-11-10 | 2015-06-24 | 张玉涛 | A kind of associated sealing arrangement for bearings |
| CN105197051A (en) * | 2015-10-16 | 2015-12-30 | 南车资阳机车有限公司 | Anti-derailment rubber wheel for railway vehicle |
| CN105292163A (en) * | 2015-10-30 | 2016-02-03 | 南车资阳机车有限公司 | Railway rolling stock derailment preventing equipment |
| CN205836833U (en) * | 2016-08-02 | 2016-12-28 | 中车资阳机车有限公司 | A kind of railway locomotive derailing device seals structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111016948A (en) * | 2019-12-20 | 2020-04-17 | 重庆艾博瑞威轨道交通设备有限公司 | Anti-tipping device of toothed rail sightseeing train |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205836833U (en) | A kind of railway locomotive derailing device seals structure | |
| CN104527660B (en) | A kind of electric-machine directly-driven bogie | |
| CN208169335U (en) | A kind of rail traffic vehicles axle axle box double row tapered roller bearing | |
| CN106246734A (en) | A kind of railway locomotive derailing device seals structure and implementation method | |
| CN201914270U (en) | Rubber sleeve of half-and-half type torsion bar | |
| CN104608789A (en) | Rail train and shaft box structure thereof | |
| CN108437695A (en) | Heavy duty goods train axle system | |
| CN201627926U (en) | Heavy truck bridge hub oil seal | |
| CN203681547U (en) | Driving device for narrow-gauge steering frame | |
| CN201214429Y (en) | Axle-box with self-sealing bearing and baffle edge | |
| CN102478023A (en) | Fan adopting welded case | |
| CN204835776U (en) | Novel locomotive dc -to -ac converter cooling blower driving motor | |
| CN105889518A (en) | Enhanced oil seal and manufacturing process thereof | |
| CN104859677A (en) | Axle box device of bogie of CRH train | |
| CN210133120U (en) | Low-floor vehicle, bogie and shaft end waterproof structure thereof | |
| CN216734298U (en) | Waterproof axle box device | |
| CN208585248U (en) | A kind of dust-proof axle and track train | |
| CN211138928U (en) | Oil brake disc type rear drive axle wheel rim structure of minibus | |
| CN205654871U (en) | Enhancement mode oil blanket | |
| CN209351398U (en) | A kind of axle box drive end bearing bracket that sealing effect is good | |
| CN208185469U (en) | A kind of three lip seal oil sealings with skeleton | |
| CN201606414U (en) | Non-contact sealing structure of tapered roller bearing of high-speed railway passenger car | |
| CN205997961U (en) | A kind of automobile and its transition arm assembly apparatus | |
| CN205677769U (en) | Wind power generator cabin gear box pipe axle leakage of oil maintenance unit | |
| CN209638250U (en) | A kind of dual-seal hub-bearing unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161221 |