RU2812187C1 - Vehicle step - Google Patents

Abstract

FIELD: railway transport.

SUBSTANCE: invention relates to the retractable steps of passenger cars. The vehicle step includes a housing, a block of steps placed in the housing in the transport position and configured to extend from the housing to the working position. The block of steps contains a channel that defines the trajectory of movement with curved, inclined and horizontal sections. Inside the channel there is a carriage containing a shaped groove and made with the possibility of horizontal movement inside the channel. Inside the inclined part of the channel that sets the trajectory of movement there is a lower retractable stage connected to the carriage by rigid links. The connection between the lower retractable step, the rigid links and the carriage is hinged. The housing contains a shaped groove, inside of which there is a switch roller pivotally connected to the step block. Another switch roller is positioned to move inside the shaped groove of the carriage.

EFFECT: increase in passenger safety is achieved.

5 cl, 9 dwg

Description

The invention relates to railway transport, in particular to retractable steps of passenger cars, allowing passengers to board and disembark.

The step is designed to allow passengers to pass from low railway platforms into the carriage and back. The footrest includes 4 steps. When the carriage is moving, all steps of the step must not protrude beyond the conventional boundary contour around the section of the carriage, called the “approach clearance” and determined by the current standards. This position of the steps is called “Transport”. For passengers to pass from low platforms to the carriage and back, all steps of the step must be located relative to the platform and the carriage, ensuring regulated distances between the low platform, steps and carriage in the vertical and horizontal directions. This position of the steps is called “Working”.

A vehicle step is known from the prior art, disclosed in patent RU 2777010, published on 08/01/2022. The known step includes a housing with linear guides fixed inside and a drive with a linear actuator, wherein the housing is equipped with an opening, a flight of stairs located in the housing in the transport position and configured to extend from the housing to the working position through said opening, a support connecting the linear guides and the staircase march, and the actuator is connected to the support with the possibility of its linear movement along the actuator, while the step includes a rocker arm equipped with three axes, and the axis is located on the first arm of the rocker arm and forms a kinematic pair of rocker arm - flight of stairs, the axis is located on the second arm of the rocker arm, and the fixed the axis forms a kinematic pair of rocker-support, curved guides fixed inside the body, carriages forming a kinematic pair of stair flight - curved guides, and a cam located inside the body on the opening side with the possibility of forming a kinematic pair with a roller mounted on the axis of the rocker when extending flight of stairs. The disadvantage of the known step is that the flight of stairs takes a straight position (the steps are horizontal) only when the step is fully extended. Those. if there is an obstacle to the full extension of the footrest (for example, a high dense snowdrift, or a defect in the railway platform), it is dangerous to use such a footrest; when extending, the flight of stairs has a significant sweep zone, which is dangerous for passengers on the railway platform; the body of the step has a significant opening for extending the flight of stairs. At the same time, the actuators of the device in the working position of the footrest are exposed to atmospheric influences, which significantly reduces the reliability of the device. The opening cover covering the housing opening has a significant length (perimeter) of the seal, which also impairs the reliability of the device. Increased drive power is required due to the need to overcome additional movement resistance caused by an increase in the reaction of the supports when holding the flight of stairs relative to the hinges that ensure the position of the flight of stairs along the trajectory.

The technical problem to be solved by the present invention is to provide a safe, weatherproof and reliable vehicle running board.

The technical result achieved by solving the technical problem is to provide the smallest sweep zone to ensure the greatest safety of passengers, the possibility of operation for low platforms with obstacles in the form of snowdrifts, defects, etc., as well as protection from atmospheric influences - in the working position Insignificant working gaps open, which are completely closed and sealed in the transport position, the length of the sealing surfaces is insignificant and allows you to create a reliable seal at low energy costs.

Achieving the stated technical result is ensured by a vehicle step, which includes a housing (1), a block of steps (2), placed in the housing (1) in the transport position and made with the ability to extend from the housing (1) to the working position, the block of steps (2) contains a channel (3) that defines the trajectory of movement with curved (4), inclined (5) and horizontal (6) sections; inside the channel (3) there is a carriage (7) containing a shaped groove (8) and made with the possibility of horizontal movement inside the channel ( 3), inside the inclined (5) part of the channel (3) defining the trajectory of movement there is a lower retractable stage (9), connected to the carriage (7) by rigid links (10), and the interfaces of the lower retractable stage (9) and rigid links (10) and the carriage (7) is made hinged (11), the body (1) contains a shaped groove (12), inside which there is a movable roller B of the switch (13), pivotally connected to the block of steps (2), while another roller A of the switch (13) is located with the ability to move inside the shaped groove (8) of the carriage (7).

Also, the shaped groove (8) of the carriage (7) is made with straight (14) and inclined (15) sections.

Also, the carriage (7) is equipped with rollers (16) to reduce losses during movement.

Also, the junction points of the lower retractable step (9), rigid links (10) and carriage (7) are equipped with rollers (17).

Also, the shaped groove (12) of the body (1) is made with straight (18) and inclined (19) sections.

The invention is explained below with reference to the drawings:

fig. 1 - transport position of the footrest,

fig. 2 - working position of the footrest,

fig. 3 - intermediate position of the footrest,

fig. 4 - retractable block of steps,

fig. 5 - carriage with a figured groove,

fig. 6 - footrest body,

fig. 7 - transport position of the footrest with the switch in the lower position,

fig. 8 - extension of the step block of the footrest when the switch is in the lower position,

fig. 9 - working position of the footrest.

The upper position of the switch - the block of steps is fully extended, the lower step is fully extended.

In fig. 1-6 shows the design of a vehicle step, including a housing (1), a block of steps (2), placed in the housing (1) in the transport position and made with the ability to extend from the housing (1) to the working position, the block of steps (2) contains a channel (3) that defines the trajectory of movement with curved (4), inclined (5) and horizontal (6) sections; inside the channel (3) there is a carriage (7) containing a shaped groove (8) and made with the possibility of horizontal movement inside the channel ( 3), inside the inclined (5) part of the channel (3) defining the trajectory of movement there is a lower retractable stage (9), connected to the carriage (7) by rigid links (10), and the interfaces of the lower retractable stage (9) and rigid links (10) and the carriage (7) is made hinged (11), the body (1) contains a shaped groove (12), inside which there is a movable roller B of the switch (13), pivotally connected to the block of steps (2), while another roller A of the switch (13) is located with the ability to move inside the shaped groove (8) of the carriage (7). The figured groove (8) of the carriage (7) is made with straight (14) and inclined (15) sections. The carriage (7) is equipped with rollers (16) to reduce losses during movement. The junction points of the lower sliding step (9), rigid links (10) and carriage (7) are equipped with rollers (17). The figured groove (12) of the body (1) is made with straight (18) and inclined (19) sections.

Depending on the relative position of the carriage (7) and the retractable block of steps (2) relative to the body (1) of the footrest, it is possible that the switch (13) is in one of the positions - lower or upper (Fig. 7-9).

Lower position: roller A is located on the inclined (15) section of the groove (8) of the carriage (7), and roller B is located on the straight (18) section of the groove (12) of the body (1); in this case, longitudinal joint movement of the carriage (7) together with the retractable block of steps (2) relative to the body (1) of the footrest is possible; roller B moves freely along the straight (18) section of the groove (12) of the body (1); roller A is located inside the inclined (15) section of the groove (8) of the carriage (7) and the movement of the carriage (7) relative to the retractable block of steps (2) does not occur; in this case, there is no movement of the rigid links (10) and the lower stage (9) relative to the retractable block (2), i.e. the lower step (9) is motionless.

Upper position: roller B is located on the inclined (19) section of the figured groove (12) of the body (1), while moving the retractable block of steps (2) becomes impossible; in this case, roller A is located on the straight (14) section of the shaped groove (8) of the carriage (7), allowing the carriage (7) to move horizontally inside the channel (3) of the retractable block of steps (2) that sets the trajectory of movement; those. the body (1) and the stage block (2) are stationary, the lower stage (9) moves along the inclined (5) part of the channel (3).

Transition state: roller A is on the inclined (15) section of the groove (8) of the carriage (7), roller B is on the inclined (19) section of the groove (12) of the body (1); when passing this position, the mechanism switches to one of the two positions described above (not shown).

The operation of the mechanism is controlled by moving the carriage (7). The switch (13) installed on the stage block (2) moves to the lower or upper position automatically.

In the transport position of the footrest, the carriage (7) is in the fully retracted channel (3) of the step block (2) (in the extreme right position). In this case, the block of steps (2) is pushed inside the body (1) of the footrest, the lower step (9) is pushed inside the block of steps (2) (raised) and is fixed by the switch (13).

In the working position, the stage block (2) is completely extended from the housing (1) (located in the extreme left position) and is fixed by the switch (13); the lower step (9) is fully extended from the step block (2) (in the lower position).

Claims (5)

1. A vehicle footboard, including a housing (1), a block of steps (2), placed in the housing (1) in the transport position and configured to be extended from the housing (1) to the working position, characterized in that the block of steps (2) contains a channel (3) that defines the trajectory of movement with a curved (4), inclined (5) and horizontal (6) sections; inside the channel (3) there is a carriage (7) containing a shaped groove (8) and made with the possibility of horizontal movement inside the channel (3), inside the inclined (5) part of the channel (3) that sets the trajectory of movement there is a lower retractable stage (9), connected to the carriage (7) by rigid links (10), and the coupling of the lower retractable stage (9), rigid links (10 ) and the carriage (7) is made hinged (11), the body (1) contains a shaped groove (12), inside of which roller B of the switch (13), pivotally connected to the block of steps (2), is located with the ability to move, while another roller A The switch (13) is located with the ability to move inside the shaped groove (8) of the carriage (7). 2. The footrest according to claim 1, characterized in that the shaped groove (8) of the carriage (7) is made with straight (14) and inclined (15) sections. 3. The footboard according to claim 1, characterized in that the carriage (7) is equipped with rollers (16) to reduce losses during movement. 4. The footrest according to claim 1, characterized in that the junction points of the lower sliding step (9), rigid links (10) and carriage (7) are equipped with rollers (17). 5. The footrest according to claim 1, characterized in that the shaped groove (12) of the body (1) is made with straight (18) and inclined (19) sections.

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