CN209146155U - Bearing holder (housing, cover), gear-box and rail vehicle - Google Patents

Bearing holder (housing, cover), gear-box and rail vehicle Download PDF

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Publication number
CN209146155U
CN209146155U CN201821855568.1U CN201821855568U CN209146155U CN 209146155 U CN209146155 U CN 209146155U CN 201821855568 U CN201821855568 U CN 201821855568U CN 209146155 U CN209146155 U CN 209146155U
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CN
China
Prior art keywords
housing
cover
bearing
bearing holder
ontology
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.)
Expired - Fee Related
Application number
CN201821855568.1U
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Chinese (zh)
Inventor
王丽平
黄蕾
付赟秋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Zhongche Nankow Machinery Co Ltd
Original Assignee
Beijing Zhongche Nankow Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Zhongche Nankow Machinery Co Ltd filed Critical Beijing Zhongche Nankow Machinery Co Ltd
Priority to CN201821855568.1U priority Critical patent/CN209146155U/en
Application granted granted Critical
Publication of CN209146155U publication Critical patent/CN209146155U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a kind of bearing holder (housing, cover), gear-box and rail vehicle.Bearing holder (housing, cover) includes cylindrical body, and the axially inside direction of ontology is formed with the installation space for installing bearing, is additionally provided with oil trap and fuel feed hole on ontology, oil trap is provided on the lateral wall of ontology, and oil trap connects installation space by fuel feed hole.Oil trap is arranged on bearing holder (housing, cover) the utility model, improves the lubricating efficiency of bearing, and reduce the manufacture difficulty of gear-box.

Description

Bearing holder (housing, cover), gear-box and rail vehicle
Technical field
The utility model relates to rail vehicle components manufacturing technology more particularly to a kind of bearing holder (housing, cover)s, gear-box and track Vehicle.
Background technique
The bottom of rail vehicle is arranged in gear-box, is mounted on the axle of vehicle, and in vehicle operation, gear-box is direct Bear impact of the rail to wheel pair.Gear-box is the critical component of rail vehicle, and reliability directly affects the operation peace of vehicle Entirely.Bearing holder (housing, cover) is one of the key part inside gear-box, and bearing holder (housing, cover) is mainly used for spring bearing, fixing bearing outer ring, is needed There are certain strength and stiffness to guarantee the stability of gear-box operation.
In the prior art, bearing holder (housing, cover) includes cylindrical body, is equipped with connecting flange in one end of ontology, body interior is along axis To the mounting portion being formed with for installing bearing, connection body exterior and internal fuel feed hole are additionally provided on ontology.In use, axis It holds and is mounted on bearing holder (housing, cover) body interior, bearing holder (housing, cover) body exterior tooth connection roller box, and the oil-collecting on fuel feed hole and gear box casing Slot is connected with oil inlet passage, and lubricating oil is introduced to the inside of bearing holder (housing, cover), is bearing lubrication.
But in the prior art, the lubrication passages that oil trap and fuel feed hole are constituted are indirect lubrication passages, lubricating efficiency compared with It is low, and the manufacture difficulty that gear-box entirety is increased on gear box casing is arranged in oil trap.
Utility model content
In order to overcome the drawbacks described above under the prior art, the purpose of this utility model is to provide a kind of bearing holder (housing, cover)s, gear Oil trap is arranged on bearing holder (housing, cover) for case and rail vehicle, the utility model, improves the lubricating efficiency of bearing, and reduce tooth The manufacture difficulty of roller box.
An embodiment of the present invention provides a kind of bearing holder (housing, cover), including cylindrical body, and the ontology is axially inside Direction is formed with the installation space for installing bearing, and oil trap and fuel feed hole are additionally provided on the ontology, and the oil trap is opened It is located on the lateral wall of the ontology, the oil trap connects the installation space by the fuel feed hole.
Bearing holder (housing, cover) as described above, optionally, the ontology include the first cylindrical portion and the second cylindrical portion of coaxial arrangement, The outer diameter of first cylindrical portion is less than the outer diameter of second cylindrical portion, and first cylindrical portion is arranged in the oil trap On lateral wall.
Bearing holder (housing, cover) as described above, optionally, the fuel feed hole are arranged in second cylindrical portion, the fuel feed hole edge It is arranged perpendicular to the ontology axially direction, and the fuel feed hole runs through second cylindrical portion.
Bearing holder (housing, cover) as described above, optionally, one end of the oil trap are connected with second cylindrical portion, and described second The through-hole for connecting the oil trap and the fuel feed hole is additionally provided in cylindrical portion.
Bearing holder (housing, cover) as described above, optionally, the installation space include first bearing installation space and second bearing peace Space is filled, the diameter of the first bearing installation space is greater than the diameter of the second bearing installation space, and the fuel feed hole connects Connect the second bearing installation space.
Bearing holder (housing, cover) as described above, optionally, one end of the ontology are also connected with flange, the flange and described second Cylindrical portion is connected.
Bearing holder (housing, cover) as described above is optionally formed with oil return space in the flange, the ontology is equipped with connection institute State the oil-recovery tank in oil return space.
Bearing holder (housing, cover) as described above, optionally, the bearing holder (housing, cover) are process using steel.
Another embodiment of the utility model provides a kind of gear-box, including shell, and any institute as above is equipped in the shell The bearing holder (housing, cover) stated.
The utility model another embodiment provides a kind of rail vehicle, including gear-box as described above.
Bearing holder (housing, cover), gear-box and rail vehicle provided by the utility model, by the way that oil trap is arranged on bearing holder (housing, cover) ontology And fuel feed hole, oil trap are provided on the lateral wall of ontology, oil trap connects the installation space inside bearing holder (housing, cover) by fuel feed hole, So that the lubrication passages that oil trap and fuel feed hole are constituted are direct lubrication passages, the lubricating efficiency of bearing is improved, and collect The manufacture difficulty for reducing gear-box entirety is arranged on bearing holder (housing, cover) in oil groove.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts, It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structure diagram for the bearing holder (housing, cover) that an embodiment of the present invention provides;
Fig. 2 is cross-sectional view of the bearing holder (housing, cover) that provides of an embodiment of the present invention in oil-collecting groove location.
Appended drawing reference:
100- ontology;
The first cylindrical portion of 110-;
111- oil trap;
The second cylindrical portion of 120-;
121- fuel feed hole;
122- through-hole;
130- oil-recovery tank;
200- installation space;
210- first bearing installation space;
220- second bearing installation space;
300- flange;
301- fixation hole;
310- oil return space.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.
Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.In the absence of conflict, following implementation Feature in example and embodiment can be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;It can be It is connected directly, the mutual of connection inside two elements or two elements can also be can be indirectly connected through an intermediary Interactively.For the ordinary skill in the art, it can understand that above-mentioned term is practical new at this as the case may be Concrete meaning in type.
It should be noted that term " first ", " second " are only used for facilitating description different in the description of the present invention, Component, be not understood to indicate or imply ordinal relation, relative importance or implicitly indicate indicated technical characteristic Quantity." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.
The bottom of rail vehicle is arranged in gear-box, is mounted on the axle of vehicle, and in vehicle operation, gear-box is direct Bear impact of the rail to wheel pair.Gear-box is the critical component of rail vehicle, and reliability directly affects the operation peace of vehicle Entirely.Bearing holder (housing, cover) is one of the key part inside gear-box, and bearing holder (housing, cover) is mainly used for spring bearing, fixing bearing outer ring, is needed There are certain strength and stiffness to guarantee the stability of gear-box operation.
In the prior art, bearing holder (housing, cover) includes cylindrical body, is equipped with connecting flange in one end of ontology, body interior is along axis To the mounting portion being formed with for installing bearing, connection body exterior and internal fuel feed hole are additionally provided on ontology.In use, axis It holds and is mounted on bearing holder (housing, cover) body interior, bearing holder (housing, cover) body exterior tooth connection roller box, and the oil-collecting on fuel feed hole and gear box casing Slot is connected with oil inlet passage, and lubricating oil is introduced to the inside of bearing holder (housing, cover), is bearing lubrication.
But in the prior art, the lubrication passages that oil trap and fuel feed hole are constituted are indirect lubrication passages, lubricating efficiency compared with It is low, and the manufacture difficulty that gear-box entirety is increased on gear box casing is arranged in oil trap.
In order to overcome the drawbacks described above under the prior art, the purpose of this utility model is to provide a kind of bearing holder (housing, cover)s, gear Oil trap is arranged on bearing holder (housing, cover) for case and rail vehicle, the utility model, improves the lubricating efficiency of bearing, and reduce tooth The manufacture difficulty of roller box.
It is described below in conjunction with the detailed content to the utility model of attached drawing, so that those skilled in the art can The more detailed content for understanding the utility model.
Embodiment one
Fig. 1 is the structure diagram for the bearing holder (housing, cover) that an embodiment of the present invention provides;Fig. 2 is an embodiment of the present invention Cross-sectional view of the bearing holder (housing, cover) of offer in oil-collecting groove location;Please refer to Fig. 1-Fig. 2.The present embodiment provides a kind of bearing holder (housing, cover)s, including circle Cylindrical body 100, the axially inside direction of ontology 100 are formed with the installation space 200 for installing bearing, on ontology 100 It is additionally provided with oil trap 111 and fuel feed hole 121, oil trap 111 is provided on the lateral wall of ontology 100, and oil trap 111 passes through oil inlet Hole 121 connects installation space 200.
Optionally, the bearing holder (housing, cover) of the present embodiment is arranged in inside the gear-box of rail vehicle, is used to support bearing, fixing axle The outer ring held.Bearing holder (housing, cover) includes ontology 100, and ontology 100 is whole cylindrical.It is formed with and is used on axial direction inside it The installation space 200 of bearing is installed, the both ends of installation space 200 are run through ontology 100, opened so that the both ends of ontology 100 are formed Mouthful.Oil trap 111 and fuel feed hole 121 are additionally provided on ontology 100, wherein oil trap 111 is provided on the lateral wall of ontology 100, Oil trap 111 connects installation space 200 by fuel feed hole 121, so that the lubricating oil in gear-box can store in oil trap 111 It is interior, and lubricating oil is delivered in installation space 200 by the fuel feed hole 121 by connecting with oil trap 111, with for bearing lubrication, Its temperature is reduced, the service life of bearing is extended.
Bearing holder (housing, cover) compared with the prior art, oil trap 111 is arranged on bearing holder (housing, cover) the present embodiment, and makes oil trap 111 are directly connected to fuel feed hole 121, so that direct lubrication passages are formed, to improve lubricating efficiency.Meanwhile by oil trap After 111 are arranged on bearing holder (housing, cover), it can reduce the design difficulty and casting difficulty of gear-box, be conducive to improve gear-box entirety Production efficiency.
Bearing holder (housing, cover) provided in this embodiment on bearing holder (housing, cover) ontology 100 by being arranged oil trap 111 and fuel feed hole 121, collection Oil groove 111 is provided on the lateral wall of ontology 100, and oil trap 111 connects the installation space inside bearing holder (housing, cover) by fuel feed hole 121 200, so that the lubrication passages that oil trap 111 and fuel feed hole 121 are constituted are direct lubrication passages, improve the profit of bearing Sliding efficiency, and the manufacture difficulty for reducing gear-box entirety is arranged on bearing holder (housing, cover) in oil trap 111.
Further, the ontology 100 of the present embodiment includes the first cylindrical portion 110 and the second cylindrical portion 120 of coaxial arrangement, For the outer diameter of first cylindrical portion 110 less than the outer diameter of the second cylindrical portion 120, the outer of the first cylindrical portion 110 is arranged in oil trap 111 On side wall.
Specifically, please referring to Fig. 1-Fig. 2, the ontology 100 of the present embodiment can be substantially divided into the first circle by the size of its outer diameter Column portion 110 and the second cylindrical portion 120, it should be noted that ontology 100 is divided into the first cylindrical portion 110 and the second cylindrical portion 120 Description merely for convenience, ontology 100 is whole made of being substantially still integrally machined, and specific processing method can be cast by molten steel It makes, can also be process with the steel column of finished product by process machineries such as turning, hole millings.Oil trap 111 is arranged first On the lateral wall of cylindrical portion 110, the cross sectional shape of oil trap 111, which can according to need, to be configured, for example, can for it is rectangular, The shapes such as triangle or circle.Oil trap 111 can be processed by milling machine, and size can also be selected according to actual needs It selects, the present embodiment does not further limit this.
Further, fuel feed hole 121 is arranged in the second cylindrical portion 120, and fuel feed hole 121 is along axial perpendicular to ontology 100 Direction setting, and fuel feed hole 121 run through the second cylindrical portion 120.Fuel feed hole 121 can make gear through the second cylindrical portion 120 Lubricating oil in case is directly entered installation space 200 by fuel feed hole 121, to improve the lubricating efficiency of bearing.
Further, one end of oil trap 111 is connected with the second cylindrical portion 120, the company of being additionally provided in the second cylindrical portion 120 The through-hole 122 of oil trap 111 Yu fuel feed hole 121 is connect, through-hole 122 can be made towards the direction of installation space 200 in the present embodiment It is obliquely installed, the lubricating oil that connecting oil trap 111 and fuel feed hole 121 by through-hole 122 can be such that oil trap 111 collects quickly flows Enter in installation space 200, improves the lubricating efficiency of bearing.
Further, installation space 200 include first bearing installation space 210 and second bearing installation space 220, first The diameter of bearing installation space 210 is greater than the diameter of second bearing installation space 220, and fuel feed hole 121 connects second bearing installation Space 220.
First bearing installation space 210 and second bearing installation space 220 are respectively used to install different in the present embodiment Bearing.In an optional embodiment, first bearing installation space 210 is for installing angular contact ball bearing, first bearing The connection type being gap-matched between the side wall and angular contact ball bearing of installation space 210 is attached, certain to provide Floating space;Second bearing installation space 220 is for installing cylinder roller bearing, the side wall of second bearing installation space 220 It is attached in such a way that interference is connect between cylinder roller bearing, to prevent cylinder roller bearing mobile.
Further, one end of ontology 100 is also connected with flange 300, and flange 300 is connected with the second cylindrical portion 120.Method Orchid 300 is the connector of bearing holder (housing, cover) and other equipment, its circumferential direction is provided with multiple fixation holes 301 on flange 300, generally , flange 300 is connected with other equipment by bolted connection.
Further, oil return space 310 is formed in flange 300, ontology 100 is equipped with the oil-recovery tank in connection oil return space 130.Oil return space 310 is for collecting the lubricating oil after having lubricated bearing, and the oil-recovery tank by being connected with oil return space 310 130 drain into lubricating oil the outside of bearing holder (housing, cover).Oil-recovery tank 130 includes be parallel to 100 axial direction of ontology the in the present embodiment Second part a part of and perpendicular to 100 axial direction of ontology, first part are arranged in the second cylindrical portion 120 and connect back to Oily space 310, second part are arranged in the first cylindrical portion 110 and connect second part and exterior space, lubricating oil is arranged Out.
Further, in this embodiment bearing holder (housing, cover) be process using steel, compared with the prior art in use cast iron The bearing holder (housing, cover) intensity of the bearing holder (housing, cover) of casting, the present embodiment is high, it is not necessary that stiffener plate is arranged on flange, to simplify bearing holder (housing, cover) Structure, greatly reduce the difficulty of casting, reduce manufacturing cost, improve yield rate.
Embodiment two
The present embodiment provides a kind of gear-box, including shell, bearing holder (housing, cover) described in embodiment one as above is equipped in shell.
Optionally, it is equipped with bearing holder (housing, cover) inside the gear-box of the present embodiment, is used to support bearing, the outer ring of fixing bearing.Axis Bearing sleeve includes ontology, and ontology is integrally cylindrical.The installation being formed on axial direction inside it for installing bearing is empty Between, ontology is run through at the both ends of installation space, so that the both ends of ontology form opening.Oil trap and fuel feed hole are additionally provided on ontology, Wherein, oil trap is provided on the lateral wall of ontology, and oil trap connects installation space by fuel feed hole, so that the profit in gear-box Lubricating oil can store in oil trap, and lubricating oil is delivered in installation space by the fuel feed hole by connecting with oil trap, with For bearing lubrication, its temperature is reduced, extends the service life of bearing.
Bearing holder (housing, cover) compared with the prior art, the present embodiment by oil trap be arranged on bearing holder (housing, cover), and make oil trap with into Oilhole is directly connected to, so that direct lubrication passages are formed, to improve lubricating efficiency.Meanwhile oil trap being arranged in bearing After putting on, it can reduce the design difficulty and casting difficulty of gear-box, be conducive to the production efficiency for improving gear-box entirety.
Gear-box provided in this embodiment is opened up by the way that oil trap and fuel feed hole, oil trap are arranged on bearing holder (housing, cover) ontology On the lateral wall of ontology, oil trap by fuel feed hole connect bearing holder (housing, cover) inside installation space so that oil trap and into The lubrication passages that oilhole is constituted are direct lubrication passages, improve the lubricating efficiency of bearing, and oil trap is arranged on bearing holder (housing, cover) Reduce the manufacture difficulty of gear-box entirety.
Embodiment three
The present embodiment provides a kind of rail vehicles, including gear-box described in embodiment two as above.
Optionally, it is equipped with bearing holder (housing, cover) inside its gear-box of the rail vehicle of the present embodiment, is used to support bearing, fixing bearing Outer ring.Bearing holder (housing, cover) includes ontology, and ontology is integrally cylindrical.It is formed on axial direction inside it for installing bearing Installation space, ontology is run through at the both ends of installation space, so that the both ends of ontology form opening.Be additionally provided on ontology oil trap and Fuel feed hole, wherein oil trap is provided on the lateral wall of ontology, and oil trap connects installation space by fuel feed hole, so that gear Lubricating oil in case can store in oil trap, and lubricating oil is delivered to installation sky by the fuel feed hole by connecting with oil trap Between in, to reduce its temperature for bearing lubrication, extend the service life of bearing.
Bearing holder (housing, cover) compared with the prior art, the present embodiment by oil trap be arranged on bearing holder (housing, cover), and make oil trap with into Oilhole is directly connected to, so that direct lubrication passages are formed, to improve lubricating efficiency.Meanwhile oil trap being arranged in bearing After putting on, it can reduce the design difficulty and casting difficulty of gear-box, be conducive to the production efficiency for improving gear-box entirety.
Rail vehicle provided in this embodiment is opened by the way that oil trap and fuel feed hole, oil trap are arranged on bearing holder (housing, cover) ontology Be located on the lateral wall of ontology, oil trap by fuel feed hole connect bearing holder (housing, cover) inside installation space so that oil trap and The lubrication passages that fuel feed hole is constituted are direct lubrication passages, improve the lubricating efficiency of bearing, and oil trap is arranged in bearing holder (housing, cover) On reduce the manufacture difficulty of gear-box entirety.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System;Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of bearing holder (housing, cover), which is characterized in that including cylindrical body, the axially inside direction of the ontology, which is formed with, to be used for The installation space of bearing is installed, is additionally provided with oil trap and fuel feed hole on the ontology, the oil trap is provided with the ontology On lateral wall, the oil trap connects the installation space by the fuel feed hole.
2. bearing holder (housing, cover) according to claim 1, which is characterized in that the ontology include coaxial arrangement the first cylindrical portion and Second cylindrical portion, the outer diameter of first cylindrical portion are less than the outer diameter of second cylindrical portion, and the oil trap is arranged described On the lateral wall of first cylindrical portion.
3. bearing holder (housing, cover) according to claim 2, which is characterized in that the fuel feed hole is arranged in second cylindrical portion, The fuel feed hole is arranged along perpendicular to the ontology axially direction, and the fuel feed hole runs through second cylindrical portion.
4. bearing holder (housing, cover) according to claim 3, which is characterized in that one end of the oil trap and the second cylindrical portion phase Even, the through-hole for connecting the oil trap and the fuel feed hole is additionally provided in second cylindrical portion.
5. bearing holder (housing, cover) according to claim 4, which is characterized in that the installation space include first bearing installation space and Second bearing installation space, the diameter of the first bearing installation space are greater than the diameter of the second bearing installation space, institute It states fuel feed hole and connects the second bearing installation space.
6. bearing holder (housing, cover) according to claim 5, which is characterized in that one end of the ontology is also connected with flange, the method It is blue to be connected with second cylindrical portion.
7. bearing holder (housing, cover) according to claim 6, which is characterized in that be formed with oil return space, the ontology in the flange It is equipped with the oil-recovery tank for connecting the oil return space.
8. bearing holder (housing, cover) according to claim 7, which is characterized in that the bearing holder (housing, cover) is process using steel.
9. a kind of gear-box, which is characterized in that including shell, be equipped in the shell as described in any one of claims 1-8 Bearing holder (housing, cover).
10. a kind of rail vehicle, which is characterized in that including gear-box as described in claim 9.
CN201821855568.1U 2018-11-12 2018-11-12 Bearing holder (housing, cover), gear-box and rail vehicle Expired - Fee Related CN209146155U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821855568.1U CN209146155U (en) 2018-11-12 2018-11-12 Bearing holder (housing, cover), gear-box and rail vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821855568.1U CN209146155U (en) 2018-11-12 2018-11-12 Bearing holder (housing, cover), gear-box and rail vehicle

Publications (1)

Publication Number Publication Date
CN209146155U true CN209146155U (en) 2019-07-23

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Application Number Title Priority Date Filing Date
CN201821855568.1U Expired - Fee Related CN209146155U (en) 2018-11-12 2018-11-12 Bearing holder (housing, cover), gear-box and rail vehicle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185346A (en) * 2018-11-12 2019-01-11 中车北京南口机械有限公司 Bearing holder (housing, cover), gear-box and rail vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185346A (en) * 2018-11-12 2019-01-11 中车北京南口机械有限公司 Bearing holder (housing, cover), gear-box and rail vehicle

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20190723

Termination date: 20191112