CN116940495A - Device for preloading and retracting a wheel assembly and trolley comprising said device - Google Patents
Device for preloading and retracting a wheel assembly and trolley comprising said device Download PDFInfo
- Publication number
- CN116940495A CN116940495A CN202380010086.3A CN202380010086A CN116940495A CN 116940495 A CN116940495 A CN 116940495A CN 202380010086 A CN202380010086 A CN 202380010086A CN 116940495 A CN116940495 A CN 116940495A
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- wheel
- support arm
- self
- linear guide
- wheel support
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- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 230000036316 preload Effects 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims description 21
- 238000007689 inspection Methods 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D15/00—Other railway vehicles, e.g. scaffold cars; Adaptations of vehicles for use on railways
- B61D15/08—Railway inspection trolleys
- B61D15/12—Railway inspection trolleys power propelled
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
- Platform Screen Doors And Railroad Systems (AREA)
- Chain Conveyers (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The wheel assembly preloading and retracting device (10, 10') comprises: a linear guide (11); an inner slider (12) and an outer slider (13) movable along a linear guide (11); a linear elastic member (14) arranged to connect the two sliders (12) (13); a first wheel support arm (15) integral with the inner slide (12); and a second wheel support arm (19) integral with the outer slide (13), wherein the outer slide (13) carries an actuated weight support wheel (20) and the inner slide (12) carries a traction wheel (16) which is in contact with the rolling surface with a preload force related to the geometry of the system. The use of the device (10, 10') is particularly advantageous for supporting the wheels of a self-propelled trolley (100) of the type adapted to move along a railway track for inspection of the underbody of a railway vehicle, since the device greatly facilitates and at least partially automates the mounting of the self-propelled trolley (100) on rails.
Description
Technical Field
The present invention relates to the technical field of mechanical suspension and movement assemblies by means of wheels.
The invention is advantageously applied to wheelbarrows suitable for movement in a limited space between two substantially opposite guide surfaces, and more particularly to barrows designed for movement along a railway track and for inspection of the underbody of a railway vehicle.
Background
Robotic or autopilot vehicles are becoming increasingly popular in many areas for the safety of human operators, replacing humans in engaging in particularly difficult or dangerous activities.
In some particular applications, the vehicle must be designed to autonomously move within a narrow and confined space between substantially vertically facing walls. For example, robotic-based or sometimes miniaturized wheel-based vehicles for inspecting pipes or pipelines are conceivable. In these types of vehicles, the overhang and motion assembly typically has: a driven wheel having a substantially horizontal axis and for supporting the weight of the vehicle; and a motorized traction wheel having a vertical axis or in any case inclined according to the inclination of the opposite walls between which the vehicle must move forward, so as to center the vehicle with respect to the pipe or line to be inspected.
The need and similar solutions can be found in certain vehicles for moving forward along a track, such as the wheel-aided platforms for inspecting underbody of railway vehicles, the subject matter of international application WO2020105018 A1. Such a vehicle allows for inspection of the underbody of a railway vehicle directly in the field without the need to transfer the vehicle to a special maintenance site, because: the vehicle of the present invention has a very limited overall vertical dimension and moves forward along the rails with the inner surfaces of the rail bars and the rail foot plane in a manner that is inclined and centered between the rails so that the platform can move under the vehicle without the wheels of the vehicle itself obstructing the movement of the platform.
In any case, a common problem for all types of autonomous vehicles of the above-mentioned type, including suspension and movement assemblies with support wheels with substantially horizontal axes and centering and movement wheels with substantially vertical axes, is that: installation programs in a working environment, i.e. on rails, in pipes or in pipelines. In fact, in most cases, in order to be able to mount the autonomous vehicle in the working position, both the passive suspension wheel and the centering and movement wheel must be able to move from a retracted configuration with minimum transversal overall dimensions to an extended operating configuration. For example, in the specific application of the subject of the above-mentioned international application for a platform for inspecting underbody of a railway train, the platform must be manually lowered from above between the rails with both the passive suspension wheels and the active centering and movement wheels in the retracted configuration. When the platform is substantially in place, the support arm of the driven wheel is manually rotated to the working position and locked, after which the drive wheel can be released outwards, whereas before this the drive wheel has to be kept manually retracted against the action of the pre-load force of the springs. Thus, it will be appreciated that the installation of the platform on the track and subsequent removal of the platform must be done manually by non-standardized procedures and take a significant amount of time.
Disclosure of Invention
The object of the present invention is to propose a wheel-assisted mechanical suspension and movement assembly, in particular for use in vehicles moving forward in confined spaces, which solves the above-emphasized problems associated with simple installation, installation speed and vehicle centering.
Another object of the present invention is to propose a self-propelled trolley for forward movement in a confined space, provided with a mechanical suspension and movement assembly by means of wheels, which allows the following operations: installation and removal from confined spaces where self-propelled carts must be moved quickly takes place in a semi-automated and standardized manner.
It is a further object of the present invention to propose a self-propelled trolley by means of wheels for checking the underbody of a railway vehicle, which is adapted to move along a railway track below a rolling surface taking into account all obstacle constraints due to the presence of the railway vehicle and the variability of the components constituting the railway superstructure, and which is provided with a mechanical suspension and movement assembly by means of wheels which facilitates and at least partially automates the operations of mounting on and removing from the track.
According to a first aspect of the invention, the above object is achieved by a mechanical suspension and movement assembly by means of wheels according to independent claim 1.
According to another aspect of the invention, the above object is achieved by a self-propelled trolley according to claim 4.
Further advantageous features and embodiments of the self-propelled trolley of the invention are presented in the subsequent dependent claims.
Drawings
The characteristics of the invention will be readily understood from the following description of an embodiment of the invention provided by way of non-limiting example with reference to the accompanying drawings, in which:
figure 1 shows a perspective view of a device according to the invention;
figure 2 shows a front view of the device of figure 1;
figure 3 shows a side view of the device of figure 1;
fig. 4 shows a top view of the device of fig. 1;
fig. 5 shows a schematic front view of a self-propelled trolley according to the present invention, inserted respectively in both: a) A confined space having a rectangular cross section; b) A confined space having an elliptical cross section;
fig. 6 shows a top view of a self-propelled trolley according to the present invention;
fig. 7 shows a perspective view of the self-propelled trolley of fig. 6;
figure 8 shows a perspective view of the self-propelled trolley of figure 6 mounted on a railway track;
figure 9 shows a front view of the pre-loading and retraction device of the trolley of figure 6 in three successive steps of the installation operation of the trolley on the railway track.
Detailed Description
Referring to fig. 1-4, a wheel assembly preloading and retracting device according to the present invention is generally indicated at 10. The apparatus 10 comprises:
a linear guide 11 is provided which,
an inner slide 12, which inner slide 12 is freely movable along said linear guide 11,
an outer slide 13, which outer slide 13 is movable along said linear guide 11 in a controlled manner,
a linear elastic member 14, the linear elastic member 14 being arranged to connect the inner slide 12 and the outer slide 13 to each other to prevent relative movement of the inner slide 12 and the outer slide 13 in a manner that moves away and/or towards each other with respect to a defined natural length distance,
a first wheel support arm 15, which first wheel support arm 15 is integral with said inner slide 12, which first wheel support arm 15 extends substantially in the direction of said linear guide 11, and which first wheel support arm 15 is adapted to support at least one first wheel 16 in such a way that the at least one first wheel 16 can rotate about an opposite first axis 17, wherein the rolling direction 18 of said at least one first wheel 16 is substantially orthogonal to the direction of said linear guide 11;
a second wheel support arm 19, which second wheel support arm 19 is integral with said outer slide 13, which second wheel support arm 19 extends substantially in the direction of said linear guide 11, and which second wheel support arm 19 is adapted to support at least one second wheel 20 in such a way that at least one second wheel 20 can rotate about an opposite second axis 21, wherein the rolling direction 22 of said at least one second wheel 20 is parallel to the rolling direction 18 of said at least one first wheel 16.
A preload adjustment member 23 is interposed between the elastic member 14 and at least one of the outer slider 13 and the inner slider 12 to adjust the distance between the inner slider 12 and the outer slider 13 in a natural length state of the elastic member 14. In the embodiment shown in the figures, the preload adjustment member 23 comprises an internally threaded tubular member which is rotatably integral with the inner trolley 12 and in which a screw integral with the elastic member 14 engages. The operating principle of the preload adjustment member 23 is the same as a pull rod adjustment assembly well known in the art and therefore not shown in more detail.
A drive member is integral with at least one of the first wheel support arm 15 and the second wheel support arm 19 to rotate at least one of the wheels supported by the at least one of the first wheel support arm 15 and the second wheel support arm 19. In the embodiment shown, the drive means are integral with the first wheel support arm 1 for rotating the first wheel 16, and comprise an electric motor 24, a pulley or toothed wheel 25 coaxial and integral with the first wheel 16, and a transmission belt 26 extending between the pulley or toothed wheel 25 and the drive shaft of the electric motor 24.
The adjustable end-of-travel member 27 is arranged to determine the retraction limit position of the inner trolley 12 along the linear guide 11.
With reference to fig. 5, the above-mentioned preloading and retracting device of the wheel assembly according to the invention, shown only in an extremely schematic way in this figure and therefore indicated with 10', is designed to be mounted on a self-propelled trolley 100', which will move forward in a confined space S, in particular in which there is at least one bottom wall B and at least one opposite limiting wall C, on which the aforementioned second wheel 20 can rest to support the weight of the trolley 100', onto which the first wheel 16 of the two devices 10', mounted opposite the trolley 100', can be pushed to center the self-propelled trolley 100' in the confined space and move the self-propelled trolley 100' forward.
From this point of view, and with reference also to fig. 6 to 9, a specific and particularly advantageous application of the preloading and retracting device of the wheel assembly according to the present invention is provided in a self-propelled trolley 100, which self-propelled trolley 100 is adapted to move along a railway track for inspection of the underbody of a railway vehicle.
The self-propelled trolley 100 comprises a platform 30 and supporting and moving means by means of wheels, comprising at least two preloading and retracting means 10 of the wheel assembly, mounted on said platform 30 in a specular manner with respect to a longitudinal axis a of said platform 30, defining the advancing direction of the platform 30 itself.
Each of the preload and retract devices 10 includes:
a linear guide 11, which linear guide 11 is anchored to the platform 30 so as to extend in a direction substantially orthogonal to the aforementioned advancing direction of the self-propelled trolley 100 in the plane of the platform,
an inner slide 12, which inner slide 12 is freely movable along said linear guide 11,
an outer slide 13, which outer slide 13 is movable along said linear guide 11 in a controlled manner,
a linear elastic member 14, the linear elastic member 14 being arranged to connect said inner slide 12 and outer slide 13 to each other to prevent relative movement of the inner slide 12 and outer slide 13 in a manner to move away and/or towards each other with respect to a defined natural length distance,
a first wheel support arm 15, which first wheel support arm 15 is integral with said inner slide 12, which first wheel support arm 15 extends substantially in the direction of said linear guide 11, and which first wheel support arm 15 is adapted to support at least one first wheel 16 in such a way that the at least one first wheel 16 can rotate about an opposite first axis 17, wherein the rolling direction 18 of said at least one first wheel 16 is substantially orthogonal to the direction of said linear guide 11 and parallel to said longitudinal axis a;
a second wheel support arm 19, which second wheel support arm 19 is integral with said outer slide 13, which second wheel support arm 19 extends substantially in the direction of said linear guide 11, and which second wheel support arm 19 is adapted to support at least one second wheel 20 in such a way that at least one second wheel 20 can rotate about an opposite second axis 21, wherein the rolling direction 22 of said at least one second wheel 20 is parallel to the rolling direction 18 of said at least one first wheel 16.
A drive member integral with at least one of the first wheel support arm 16 and the second wheel support arm 19 to rotate at least one of the wheels supported by the at least one of the first wheel support arm 16 and the second wheel support arm 19.
In the embodiment shown in fig. 6 to 8, the self-propelled trolley 100 comprises four devices 10, two of the four devices 10 being arranged on the left side of the self-propelled trolley and the other two of the four devices 10 being arranged on the right side of the self-propelled trolley.
The first wheel 16 has a first axis 17 substantially orthogonal to the plane defined by the platform 30 and the first wheel 16 is provided with the drive member such that the first wheel can be rotated to move the self-propelled cart 100 forward.
The second wheel 20 has a second axis 21 substantially parallel to the direction of extension of said linear guide 11, so that the wheels are arranged substantially vertically to support the weight of the self-propelled trolley 100.
The platform 30 has a maximum transverse dimension, with respect to the direction of the longitudinal axis a and therefore with respect to the direction of advancement of the self-propelled trolley 100 along the railway track, smaller than the dimension of the gauge between the rails R forming the railway track.
Referring to fig. 9, the at least one first wheel 16 and the at least one second wheel 20 are arranged to be located outside the platform 30 with respect to the lateral direction, such that after actuation of the outer slide 13 along the linear guide 11, the at least one first wheel 16 and the at least one second wheel 20 selectively adopt different operating configurations including at least: a retracted configuration with a minimum lateral dimension of the self-propelled trolley 100, fig. 9 a), in which both the at least one first wheel 16 and the at least one second wheel 20 are separated from the surface of the rail R; an intermediate first contact configuration, fig. 9 b), in which the at least one first wheel 16 is in contact with the inner surface of the bar G of the rail R, while the at least one second wheel 20 is separated from the rail R; and an extended operating configuration, fig. 9 c), in which the at least one first wheel 16 is in contact with the inner surface of the stem G of the rail R with a determined contact force and the at least one second wheel 20 is in contact with the lower foot plane S of the rail R, the driving means being integral with the first arm 15 to rotate the at least one first wheel 16, while the at least one second wheel 20 is arranged to roll freely on the foot plane S of the rail R.
The overall vertical dimension of the self-propelled cart 100 is substantially contained within the overall height dimension of the rail bar R such that the self-propelled cart 100 is movable along the track below the opposing rolling planes.
The above-described features of the self-propelled cart 100 of the present invention, and in particular of the pre-loading and retraction device of the wheel assembly 10 provided in the self-propelled cart 100, are particularly advantageous for speeding up and standardizing the installation operation of the self-propelled cart 100 on a track, so that the self-propelled cart can be moved quickly from one track to another, thus optimizing the periodic maintenance operations of the railway vehicle.
In fact, thanks to the above-described structure, the mounting of the self-propelled trolley 100 on the track can be performed by activating actuation members of an external trolley 13 of a known type, not shown, so that the device 10 is moved into a retracted configuration with minimum lateral dimensions, so that the self-propelled trolley 100 can be lowered between the rails R from above. When the self-propelled trolley is kept at a substantially correct mounting height, the moving means of the outer trolley 13 are actuated to move the outer trolley 13 outwards along the linear guide 11. Since the two carts, the outer cart 13 and the inner cart 12, are connected by the linear elastic member 14, the movement of the outer cart 13 causes the inner cart 12 to move outwards as well, until an intermediate first contact configuration is reached, in which, thanks to the dimensions of the device 10, the first wheel 16 is in contact with the inner surface of the bar G of the rail R, while the second wheel 20 remains separated from the rail R itself. The outer trolley 13 continues to actuate outwards until the second wheel carried by the outer trolley comes into contact with the lower foot plane S of the rail R, wherein the inner trolley 12 remains stationary as the first wheel 16 has been abutted, but the thrust of the first wheel 16 against the rod G increases as a result of the loading of the elastic member 14, in which case the elastic member 14 comprises a traction helical spring which stretches as the two trolleys 12 and 13 move away.
Thus, actuation of the device 10 allows to switch the self-propelled trolley 100 from a configuration with minimum overall dimensions that allows to introduce the self-propelled trolley 100 into the working area, to a working configuration in which the device 10 brings the opposite wheels into contact with the surface on which the wheels are to roll, and also thereby automatically centers the self-propelled trolley 100 in a limited working environment.
Regarding the above-illustrated, modifications and variants of both the preloading and retracting device of the wheel assembly according to the invention and of the entire self-propelled trolley are certainly conceivable, depending on the specific functional or application requirements, while still remaining within the scope of protection provided by the appended claims.
Such variations and modifications can of course be regarded as equivalent solutions and are therefore equally protected by the claims.
Claims (8)
1. A pre-load and retraction device (10, 10') of a wheel assembly, characterized in that it comprises:
a linear guide (11),
an inner slide (12), said inner slide (12) being freely movable along said linear guide (11),
an outer slide (13), said outer slide (13) being movable along said linear guide (11) in a controlled manner,
-a resilient member (14), the resilient member (14) being arranged to connect the inner slider (12) and the outer slider (13) to each other to prevent relative movement of the inner slider (12) and the outer slider (13) in a manner that moves away and/or towards each other with respect to a defined natural length distance,
-a first wheel support arm (15), the first wheel support arm (15) being integral with the inner slide (12), the first wheel support arm (15) extending substantially in the direction of the linear guide (11), and the first wheel support arm (15) being adapted to support at least one first wheel (16) in such a way that the at least one first wheel (16) can rotate about an opposite first axis (17), wherein the rolling direction (18) of the at least one first wheel (16) is substantially orthogonal to the direction of the linear guide (11);
-a second wheel support arm (19), the second wheel support arm (19) being integral with the outer slide (13), the second wheel support arm (19) extending substantially in the direction of the linear guide (11), and the second wheel support arm (19) being adapted to support at least one second wheel (20) in such a way that the at least one second wheel (20) can rotate about an opposite second axis (21), wherein the rolling direction (22) of the at least one second wheel (20) is parallel to the rolling direction (18) of the at least one first wheel (16).
2. The wheel assembly preloading and retracting device (10, 10') according to claim 1, characterized in that it comprises a preloading adjusting member interposed between at least one of the outer slide (13) and the inner slide (12) and the elastic member (14) to adjust the distance between the inner slide (12) and the outer slide (13) in the natural length state of the elastic member (14).
3. The wheel assembly preloading and retracting device (10, 10') of claim 1, characterized in that it comprises a driving member integral with at least one of the first wheel support arm (15) and the second wheel support arm (19) to rotate at least one of the wheels supported by said at least one of the first wheel support arm (15) and the second wheel support arm (19).
4. The wheel assembly preloading and retracting device (10, 10') according to the preceding claim, characterized in that the driving means are integral with the first wheel support arm (15) to rotate the first wheel (16), and in that they comprise: an electric motor (24); a pulley or toothed wheel (25) coaxial and integral with said first wheel (16); and a drive belt (26) between the pulley or toothed wheel (25) and the drive shaft of the electric motor (24).
5. A self-propelled trolley (100, 100') of the type adapted to move in a confined space between two substantially opposite guiding surfaces, comprising:
-a platform (30), and
by means of the supporting and moving means of the wheel,
the self-propelled trolley is characterized in that the support and movement means by means of wheels comprise at least two preloading and retraction means (10, 10 ') of the wheel assembly of the support and movement means, the preloading and retraction means (10, 10 ') being mounted on the platform (30) in a specular manner with respect to a longitudinal axis (a) of the platform (30), the longitudinal axis (a) of the platform (30) defining the direction of advance of the platform (30) itself, each of the preloading and retraction means (10, 10 ') comprising:
a linear guide (11) anchored to the platform (30) to extend in a direction substantially orthogonal to the direction of advance of the self-propelled cart (100) in the plane of the platform,
an inner slide (12), said inner slide (12) being freely movable along said linear guide (11),
an outer slide (13), said outer slide (13) being movable along said linear guide (11) in a controlled manner,
-a resilient member (14), the resilient member (14) being arranged to connect the inner slider (12) and the outer slider (13) to each other to prevent relative movement of the inner slider (12) and the outer slider (13) in a manner that moves away and/or towards each other with respect to a defined natural length distance,
-a first wheel support arm (15), the first wheel support arm (15) being integral with the inner slide (12), the first wheel support arm (15) extending substantially in the direction of the linear guide (11) and the first wheel support arm (15) being adapted to support at least one first wheel (16) in such a way that the at least one first wheel (16) can rotate about an opposite first axis (17), wherein the rolling direction (18) of the at least one first wheel (16) is substantially orthogonal to the direction of the linear guide (11) and parallel to the longitudinal axis (a);
-a second wheel support arm (19), the second wheel support arm (19) being integral with the outer slide (13), the second wheel support arm (19) extending substantially in the direction of the linear guide (11), and the second wheel support arm (19) being adapted to support at least one second wheel (20) in such a way that the at least one second wheel (20) can rotate about an opposite second axis (21), wherein the rolling direction (22) of the at least one second wheel (20) is parallel to the rolling direction of the at least one first wheel (16);
-a drive member integral with at least one of the first wheel support arm (16) and the second wheel support arm (19) to rotate at least one of the wheels supported by the at least one of the first wheel support arm (15) and the second wheel support arm (19).
6. Self-propelled trolley (100, 100') according to the previous claim, characterized in that said at least one first wheel (16) has a first wheel axis (17) substantially orthogonal to the plane defined by said platform (30), and said at least one first wheel (16) is provided with said driving means such that said at least one first wheel (16) can be rotated to move said self-propelled trolley (100) forward/backward.
7. Self-propelled trolley according to claims 4 and 5, characterized in that said at least one second wheel (20) has a second wheel axis (21) substantially parallel to the direction of extension of said linear guide (11), so that said at least one second wheel (20) is arranged substantially vertically to support the weight of said self-propelled trolley (100).
8. Self-propelled trolley (100) of the type suitable for moving along a railway track for checking the underbody of a railway vehicle, characterized in that, with respect to the direction of the longitudinal axis (a) and therefore with respect to the advancing direction of the self-propelled trolley (100) along a railway track, the platform (30) has a maximum transverse dimension smaller than the dimension of the track gauge between the rails (R) forming the railway track, the at least one first wheel (16) and the at least one second wheel (20) being arranged to be located outside the platform (30) with respect to the transverse direction, such that, after actuation of the external slider (13) along the linear guide (11), the at least one first wheel (16) and the at least one second wheel (20) selectively adopt different operating configurations, including at least: -a retracted configuration with a minimum lateral dimension of the self-propelled trolley (100), in which both the at least one first wheel (16) and the at least one second wheel (20) are separated from the surface of the rail (R); -an intermediate first contact configuration in which the at least one first wheel (16) is in contact with the inner surface of the stem (G) of the rail (R) while the at least one second wheel (20) is separated from the rail (R); and an extended operating configuration in which the at least one first wheel (16) is in contact with the inner surface of the rod (G) of the rail (R) with a determined contact force and the at least one second wheel (20) is in contact with the upper rail foot plane (S) of the rail (R), the drive member being integral with the first wheel support arm (15) to rotate the at least one first wheel (16) while the at least one second wheel (20) is arranged to roll freely on the upper rail foot plane (S) of the rail (R), the overall vertical dimension of the self-propelled cart (100) being substantially contained within the overall height dimension of the rail (R) such that the self-propelled cart (100) is movable along the rail below a rail rolling surface.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102022000001133 | 2022-01-24 | ||
| IT102022000001133A IT202200001133A1 (en) | 2022-01-24 | 2022-01-24 | DEVICE FOR PRELOADING AND RETRACTING A WHEEL GROUP AND TROLLEY INCLUDING SAID DEVICE |
| PCT/IB2023/050590 WO2023139565A1 (en) | 2022-01-24 | 2023-01-24 | Preload and retraction device of a wheel assembly and self-propelled cart comprising said device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116940495A true CN116940495A (en) | 2023-10-24 |
Family
ID=80999676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202380010086.3A Pending CN116940495A (en) | 2022-01-24 | 2023-01-24 | Device for preloading and retracting a wheel assembly and trolley comprising said device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN116940495A (en) |
| IT (1) | IT202200001133A1 (en) |
| WO (1) | WO2023139565A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117261503A (en) * | 2023-08-29 | 2023-12-22 | 北京市市政工程设计研究总院有限公司 | Vehicle bottom overhauling equipment |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012004328A1 (en) * | 2012-03-07 | 2013-09-12 | Wolfgang Zappel | Road-rail vehicle has road driving wheels received in respective receiver such that intersection of pivot axis to rolling plane of wheel is arranged at preset distance from contact point of wheel |
| CN204674585U (en) * | 2015-06-01 | 2015-09-30 | 北京新联铁科技股份有限公司 | State observation device at the bottom of rail vehicle |
| IT201600098012A1 (en) * | 2016-09-29 | 2018-03-29 | Scuola Superiore Santanna | SELF-PROPELLED APPARATUS FOR MAINTENANCE ON CONDITION OF THE RAILWAY CONVEYOR TRUCK |
| IT201800010541A1 (en) | 2018-11-23 | 2020-05-23 | Scuola Superiore Di Studi Univ E Di Perfezionamento Santanna | SEMI-AUTOMATIC EQUIPMENT FOR MAINTENANCE ON THE CONDITION OF THE RAILWAY PANTOGRAPH |
-
2022
- 2022-01-24 IT IT102022000001133A patent/IT202200001133A1/en unknown
-
2023
- 2023-01-24 CN CN202380010086.3A patent/CN116940495A/en active Pending
- 2023-01-24 WO PCT/IB2023/050590 patent/WO2023139565A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023139565A1 (en) | 2023-07-27 |
| IT202200001133A1 (en) | 2023-07-24 |
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