EP4324715A1 - Retractable step for railway vehicle - Google Patents
Retractable step for railway vehicle Download PDFInfo
- Publication number
- EP4324715A1 EP4324715A1 EP21940508.1A EP21940508A EP4324715A1 EP 4324715 A1 EP4324715 A1 EP 4324715A1 EP 21940508 A EP21940508 A EP 21940508A EP 4324715 A1 EP4324715 A1 EP 4324715A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- elastic supporting
- plates
- outer side
- vertical
- 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
- 230000003628 erosive effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D23/00—Construction of steps for railway vehicles
Definitions
- the present invention relates to a retractable step for a railway vehicle, belonging to the technical field of accessories of rail vehicles.
- a maintenance staff or driver has to get on and off through a boarding step mounted below a bottom frame edge beam.
- Existing boarding steps are almost fixed, that is, a step mounting plate is designed below the bottom frame edge beam, and the step is fixedly connected to the step mounting plate, without changing the height of the step. Due to gauge requirements, such a step is generally 500 mm higher than a rail surface.
- a support surface of the human body moves from soles of the feet to the step, and a center of gravity gradually deviates from the support surface. If the first step is high, a person has to spend more effort and getting on the vehicle becomes more difficult.
- locomotives especially railway engineering vehicles, are mostly used outdoors and lack platforms, people have to stand on the ground or sleepers, so the boarding height increases.
- the fixed step is inconvenient to get on and off and easily leads to injuries, which seriously affect comfort and safety.
- a torsion spring type step disclosed in the utility model patent CN201620805680.9 has only single-layer steps with a large span and lacks protection, making it susceptible to erosion by sand and dust; the torsion spring is prone to failure; and the single-layer steps cannot be simply replaced.
- electric steps require a large space, require wiring and piping, are prone to interference with devices such as bogies, and have complex structures, low reliability, and weak seismic resistance, making them unsuitable for widespread use.
- the present invention provides a retractable step for a rail vehicle.
- a specific technical solution is as follows.
- a retractable step for a rail vehicle includes a step assembly and elastic supporting boxes located on two sides of the step assembly;
- the entire springs are confined within cavities formed by the elastic supporting boxes and the vertical plates, which avoids erosion of the springs by dust and sand and is beneficial to improving weather resistance;
- the step assembly includes a plurality of step plates, and a user can choose appropriate step plates according to an actual ground height; and when the user steps on the step plates, the step plates overcome spring force and move down to limit positions, which achieves height adjustment of the step plates and is beneficial for the user to get on and off a rail vehicle.
- the step plates return to their highest positions under the action of the springs to meet gauge requirements of the vehicle without user's operation.
- guide rods for guiding the springs are arranged in the elastic supporting box, and the connecting plate is provided with a through hole through which the guide rod passes.
- the guide rod guides the step assembly to prevent its overturning.
- more than two guide rods and more than two springs are arranged in one-to-one correspondence.
- a limit block is arranged inside the elastic supporting box, and the limit block is fixedly connected to the bottom plate to define a limit position of downward movement of the connecting plate.
- a mounting plate is fixedly arranged on the outer side plate, the mounting plate is arranged horizontally and extends towards an outer side of the outer side plate, and the mounting plate is provided with connecting holes.
- the connecting holes are kidney-shaped holes.
- top plate is detachably connected to the mounting plate through fasteners. Advantages are as follows: After the connecting plate of the step assembly is mounted into the elastic supporting boxes, the top plates are connected to the mounting plates, which is beneficial to replacement of step assemblies with different specifications to meet requirements of different usage scenarios.
- the retractable step of the present invention is simple and light in structure, can be connected to a vehicle body by means of bolts, facilitates mounting and use of welding parts and standard parts, and is easy to manufacture, stable, reliable, and long in service life.
- the spring mounting space is shielded by the baffles, so that substances such as sandy soil can be prevented from eroding the springs.
- the size of the step is convenient to replace according to actual needs. When a person gets on and off the vehicle, the boarding height is effectively reduced to improve comfort. After the person gets on and off the vehicle, the retractable step automatically returns to its initial state to meet gauge requirements of the vehicle without operations. Multi-layer steps can solve a problem of large spans, and the restoring force of the springs can help people easily board the vehicle.
- step assembly 1 connecting plate 1.1, upper step plate 1.2, vertical plate 1.3, lower step plate 1.4, elastic supporting box 2, front baffle 2.1, rear baffle 2.2, outer side plate 2.3, mounting plate 2.4, bottom plate 2.5, limit block 2.6, top plate 2.7, spring 3, guide rod 4, through hole 5, and connecting hole 6.
- a retractable step for a rail vehicle includes a step assembly 1 and elastic supporting boxes 2 located on two sides of the step assembly 1.
- Each elastic supporting box 2 includes a front baffle 2.1, a rear baffle 2.2, an outer side plate 2.3, a mounting plate 2.4, a bottom plate 2.5, and a limit block 2.6.
- a horizontal line in FIG. 2 shows a length direction, and a size in this direction is called length; a vertical dotted line in FIG. 2 shows a perpendicular direction (vertical direction), and a size in this direction is called height; a direction perpendicular to a paper surface in FIG. 2 is a width direction (namely, a third direction in a right-handed orthogonal coordinate system), and a size in this direction is called width;
- the vertical dotted line in FIG. 2 is a symmetrical centerline of the retractable step, a side near the centerline in the length direction is called an inner side, and a side away from the centerline is called an outer side.
- Each elastic supporting box 2 includes a bottom plate 2.5, a front baffle 2.1, a rear baffle 2.2, and an outer side plate 2.3 that are fixedly connected to each other; grooves or protrusions for fixing springs 3 are designed on an upper surface of the bottom plate 2.5, the outer side plate 2.3 is connected to the outer side of the bottom plate 2.5, and a mounting plate 2.4 is connected to an upper outer side of the outer side plate 2.3; and the bottom plate 2.5, the outer side plate 2.3, and the mounting plate 2.4 form a "zigzag"-shaped structure, which serves as a force transmission component.
- the front baffle 2.1 and the rear baffle 2.2 are arranged in the width direction in order to increase strength of the "zigzag"-shaped structure, shield an internal space, and constrain a movement space of the step assembly 1.
- the mounting plate 2.4 is arranged horizontally, and the mounting plate 2.4 is provided with connecting holes 6; and preferably, the connecting holes 6 are kidney-shaped holes.
- the top plate 2.7 is detachably connected to the mounting plate 2.4 through fasteners. After a connecting plate 1.1 of the step assembly is mounted into the elastic supporting box 2, the top plate 2.7 is connected to the mounting plate 2.4, which is beneficial to replacement of step assemblies 1 with different specifications to meet requirements of different usage scenarios.
- the bottom plate 2.5, the front baffle 2.1, the rear baffle 2.2, and the outer side plate 2.3 may alternatively be fixedly connected (such as welded) to form the elastic supporting box 2.
- the step assembly 1 is of a frame structure, with an upper step plate 1.2 and a lower step plate 1.4 fixed together through two vertical and opposite vertical plates 1.3. Both the upper and lower step plates can undergo anti-slip treatment for stepping on.
- An extension portion of the upper step plate 1.2 beyond the lower step plate 1.4 is the connecting plate 1.1.
- the connecting plate 1.1 may be a plate component separately welded and fixed to the outer side of the vertical plates 1.3.
- the connecting plate 1.1 abuts against the springs 3, and at least a portion of the connecting plate 1.1 is located inside a cavity of each elastic supporting box 2.
- the step assembly 1 in this embodiment includes only two step plates. A person skilled in the art can understand that more than two step plates can be configured.
- the distance between the two vertical plates 1.3 is less than the distance between the two elastic supporting boxes 2, and the width of the connecting plate 1.1 is less than the distance between the front baffle 2.1 and the rear baffle 2.2, so as to ensure that the step assembly 1 can move smoothly in the vertical direction.
- each spring 3 supports the connecting plate 1.1 of the step assembly 1, and a lower end is fixed to the bottom plate 2.5 of the elastic supporting box 2.
- the springs 3 compress and their upper ends are lowered, thereby achieving an effect of up-and-down movement of the step assembly 1.
- a limit block 2.6 is arranged inside each elastic supporting box 2, and a size of the limit block avoids the spring.
- the limit blocks 2.6 are in contact with the connecting plate 1.1 to limit the movement of the step assembly 1 to a maximum downward travel.
- guide rods 4 may be arranged on the bottom plate 2.5, the springs 3 are sheathed on the guide rods 4, and a sliding sleeve or bearing (not shown) is arranged between an upper part of each spring 3 and the connecting plate 1.1.
- the connecting plate 1.1 is provided with through holes 5 through which the guide rods 4 pass.
- the initial state of the springs 3 is a compressed state, and the connecting plate 1.1 abuts against the top plate 2.7. It is suggested that initial compression force is 1 to 3 times the weight of the step assembly.
- a mounting method is as follows: The elastic supporting boxes 2 are mounted on a vehicle body (through the mounting plates 2.4), where the mounting plates 2.4 are provided with kidney-shaped holes for appropriately adjusting positions of the elastic supporting boxes 2.
- the springs 3 are mounted on the guide rods 4 of the elastic supporting boxes 2, and sliding sleeves are placed on upper ends of the springs 3.
- the connecting plate 1.1 of the step assembly 1 is mounted into spaces of the elastic supporting boxes 2, the guide rods 4 pass through the connecting plate 1.1, and the distance between the two elastic supporting boxes 2 is adjusted.
- the top plates 2.7 are mounted after initial stress is applied to the step assembly 1. When it is necessary to replace the step assembly 1, only the top plates 2.7 are removed to mount a new step assembly 1.
- compression springs used in the foregoing embodiment may alternatively be tension springs, for example, an upper end of each tension spring is fixed to the top plate 2.7, and a lower end is connected to the connecting plate 1.1, which can also achieve the same technical effect.
- the limit blocks 2.6 can be cancelled, and springs with higher stiffness can be used, or the bottom plates 2.5 can be used to form limits.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Step Arrangements And Article Storage (AREA)
- Passenger Equipment (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110545961.0A CN113291336B (zh) | 2021-05-19 | 2021-05-19 | 一种轨道车辆的可伸缩脚踏 |
| PCT/CN2021/130003 WO2022242064A1 (zh) | 2021-05-19 | 2021-11-11 | 一种轨道车辆的可伸缩脚踏 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4324715A1 true EP4324715A1 (en) | 2024-02-21 |
Family
ID=77322807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21940508.1A Pending EP4324715A1 (en) | 2021-05-19 | 2021-11-11 | Retractable step for railway vehicle |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4324715A1 (zh) |
| CN (1) | CN113291336B (zh) |
| WO (1) | WO2022242064A1 (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291336B (zh) * | 2021-05-19 | 2022-08-12 | 中车株洲电力机车有限公司 | 一种轨道车辆的可伸缩脚踏 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0735148B2 (ja) * | 1989-05-23 | 1995-04-19 | 弘西商事株式会社 | 二階建バス |
| FR2654999B1 (fr) * | 1989-11-27 | 1992-01-24 | Regie Autonome Transports | Marche inferieure abaissable d'emmarchement pour vehicules, en particulier pour vehicules de transport en commun. |
| US5944332A (en) * | 1997-12-29 | 1999-08-31 | Lee; Hsi Sin | Dirt removing running board for automobile |
| US20030094781A1 (en) * | 2001-10-26 | 2003-05-22 | Alfonso Jaramillo | Retractable step for vehicles and other purposes |
| CN201971018U (zh) * | 2010-12-08 | 2011-09-14 | 周明星 | 铁路客车伸缩踏板 |
| CN104787065B (zh) * | 2015-04-29 | 2017-07-04 | 南京康尼机电股份有限公司 | 一种动车组门系统的自动踏板装置 |
| CN204870769U (zh) * | 2015-08-26 | 2015-12-16 | 上海格拉曼国际消防装备有限公司 | 一种消防车用脚踏板 |
| CN106184248A (zh) * | 2016-07-29 | 2016-12-07 | 中车长春轨道客车股份有限公司 | 城市轨道车辆蹬车脚蹬 |
| CN207842807U (zh) * | 2017-11-17 | 2018-09-11 | 镇江方略科技咨询有限公司丹阳分公司 | 一种大型货运汽车踏板 |
| CN208376636U (zh) * | 2018-07-02 | 2019-01-15 | 湖南铁道职业技术学院天一实业有限公司 | 一种自动复位的脚踏板 |
| CN209756949U (zh) * | 2018-12-29 | 2019-12-10 | 常州市神霸车辆配件有限公司 | 汽车脚踏板 |
| CN111532208A (zh) * | 2020-04-15 | 2020-08-14 | 合肥丰华汽车零部件有限公司 | 一种货车用多功能台阶踏板 |
| CN113291336B (zh) * | 2021-05-19 | 2022-08-12 | 中车株洲电力机车有限公司 | 一种轨道车辆的可伸缩脚踏 |
-
2021
- 2021-05-19 CN CN202110545961.0A patent/CN113291336B/zh active Active
- 2021-11-11 EP EP21940508.1A patent/EP4324715A1/en active Pending
- 2021-11-11 WO PCT/CN2021/130003 patent/WO2022242064A1/zh active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022242064A1 (zh) | 2022-11-24 |
| CN113291336B (zh) | 2022-08-12 |
| CN113291336A (zh) | 2021-08-24 |
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