RU2605660C1 - Vehicle retractable boarding platform, mainly low floor tram car - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to automotive industry. Retractable boarding platform comprises sliding panel, support rollers, panel extension power drive, cleaning element from sticking. Sliding panel is made of links, which in working position allows to ensure non-bending rigid state. With retraction on said links upper surface layer of flexible sheet material with non-slippery surface is laid, fixed by front edge with first link. Sliding panel in transport position is folded so that links are laid in volute, and flexible sheet material is folded into roll. Volute and roll drive rollers are kinematically connected with panel extension power drive made of two parts. One of parts is located on floor in tram car, and other is under car floor about entrance doors opening in additionally formed compartment. Additional compartment lower part is closed by detachable cover.

EFFECT: higher reliability of operation and reduced weight of boarding platform.

3 cl, 5 dwg

Description

The invention relates to a rail vehicle, in particular to the design of the platform for boarding, disembarking passengers.

It is a well-known landing pad installed on the city bus LIAZ5292 XX, developed by the Likinsky Bus Plant. The platform is located at the middle double-wing swing doors. Structurally, the landing pad is a flat pad assembled from sheet material elements and installed with the help of a hinge loop on the outer end edge of the passenger compartment floor so that when the door leaves are closed in the transport position, the platform is on the floor inside the passenger compartment. At stops after opening the doors, if necessary, the platform leans outward by manually turning the hinge. An inclined platform is formed, providing boarding, boarding of passengers with disabilities or with prams. At the end of the landing, the landing is manually returned to the transport position.

The disadvantage of this design is:

- the site is moved manually;

- the location of the platform on the floor of the passenger compartment complicates its cleaning.

Known retractable footboard (platform) according to the patent for invention RU 2324614 C2 dated 02.20.2004, containing in the rectilinear direction a retractable footboard and a bar movably connected to it. The bar extends over the entire length of the extendable step and is activated under the leading edge of the extendable step. In addition, the bar includes at least one sensor detecting either the position of the bar relative to the extendable step, or the force transmitted by the bar to the extendable step. When a change in the position of the bar is detected, the extension stops and the retractable footboard is retracted to a predetermined length, providing a safe distance from the obstacle.

The disadvantage of this design is:

- the installation of sensors on a movable bar complicates the two-link design of the retractable footrest, and also increases the time of its extension.

The closest set of essential features to the proposed invention is the landing site of a vehicle car according to patent RU 2260522 C2 dated 08/04/2003, containing a supporting frame with removable flooring, a sliding panel mounted to move along horizontal rollers, and a guide panel mounted with the ability to move on horizontal rollers in the guides. The sliding and guide panels are kinematically interconnected using a torsion bar and represent a single movable unit, driven by an electric motor. The drawer also comprises vertical support rollers, and the guide panel is provided with vertical support rollers resting on the guides. The supporting frame is equipped with front and rear gears, on which a drive gear belt is mounted kinematically connected to the guide panel by means of a coupling device. A hinged curtain is installed on the outer edge of the flooring, equipped with a skid to protect the sliding panel from snow and dirt. In case of emergency lack of power supply to the power drive of the panel extension, the landing pad is equipped with a manual drive.

The disadvantage of this design is:

- the absence of a sealing element on the removable flooring and drain holes in the body of the supporting frame can lead to accumulation of dirt and, as a result, failure of the drive elements of the sliding and guide panels is possible;

- the absence of a delivery link in the design of the pull-out panel may lead to a shock in contact with an unexpected obstacle;

- there is no cleaning of the bottom surface of the drawer;

- a large length of the landing pad and, as a result, an increase in its weight and the length of the supporting frame and removable flooring.

The aim of the invention is the creation of a landing platform design for passengers with disabilities or prams with remote control for mechanized transformation from a working position to a transport one with a small form of laying.

The solution to this problem is achieved by the fact that the sliding panel is made of series-connected links with unidirectional articulated mobility, which allows in the working (extended) position to provide an unbending rigid state, when sliding on the upper surface of these links a layer of flexible sheet material with a non-slip surface is fixed, fixed by a leading edge with the first link. For transport position, the panel with flexible sheet material is folded so that the links are laid in a cochlea with a drive roller, and the flexible sheet material is folded into a roll with a drive roller. In this case, the drive roller of the cochlea and the drive roller of the roll are kinematically connected to a power drive of the panel extension made of two parts so that one of them is located on the floor in the tram car, and the second under the car floor near the opening of the entrance doors in an additionally formed installation compartment it contains a snail with a drive roller and a roll with a drive roller. The bottom of the compartment is covered by a removable cover. The link with unidirectional articulated mobility is made as a link with a parallel hinge located at the end ends by installing rollers, on which, in turn, the roller chain elements are mounted. At the same time, support rollers in the amount of three pieces are installed on the lower case part of the first link. On the body part of the entrance slit of the additional compartment, support rollers are installed in the amount of two pieces and an element for clearing of sticking of the upper surface of the flexible sheet material and the lower surface of the links forming the panel in the form of brushes. The power drive in case of emergency power failure is equipped with a manual drive.

The invention is illustrated by drawings, where:

in FIG. 1 shows a General view of the landing landing retractable in the transport position, side view;

in FIG. 2 is a general view of the landing landing retractable in the working position, side view;

in FIG. 3 - a general view of the landing landing retractable in the working position, view A;

in FIG. 4 - articulation of links, view B;

in FIG. 5 is a kinematic diagram of a power drive landing retractable platform, view B.

A retractable landing platform for a vehicle, mainly a low-floor tram, contains (Fig. 1-4) a panel 1 made of series-connected links 2 with unidirectional mobility, which allows for an unbreakable rigid state in the working (extended) position.

For the period of extension to the upper surface 3 of these links forming a flat platform, a layer of flexible sheet material 4 with a non-slip surface 5 is laid, fixed by the leading edge with the first link 2. When the tram car moves (transport position), links 2 are laid in the cochlea 6, and the sheet material 4 with a non-slip surface 5 is rolled into a roll 7 onto a drive roller 8. In this case, the drive roller 9 of the scroll 6 and the drive roller 8 are kinematically connected to the power drive 10 to extend the panel 1. The scroll 6 with the links laid in it 2 and sheet material 4 rolled up into a roll 7 are located in an additional compartment 11 under the floor 12 in the opening at the entrance of the car doors 13. The lower part of the compartment 11 is closed by a removable cover 14 with a sealed gasket 15. A cleaning element is installed on the body of the entrance slit 16 of compartment 11 precipitation and possible mud deposits, made as brushes 17, 18.

Structurally, link 2 is made as a link with a parallel hinge located at both end ends 19, 20. The articulated mobility is made by installing the rollers 21, 22, on which, in turn, the elements of the roller (sleeve) chain 23 are installed with a step equal to 15 , 88 mm. In addition, on the lateral surfaces of link 2, longitudinal angular depressions 24 and protrusions 25 are made to form a flat upper surface 3 in its working position and to exclude the unexpected shift of links 2 between themselves at the time of passenger boarding / disembarkation. The first link 2 of the panel 1 is bonded to the sheet material 4 using a threaded connection. The fastening is made with countersunk head screws 26 over the entire width of the link. In addition, on the lower case part of the link, support rollers 27 are installed in the amount of 3 pieces to prevent friction with the surface of the stop platform during movement of the panel 1. The rollers 27 are fastened to the link 2 using screws 26. The other edge of the sheet material 4 for folding into a roll 7 mounted on the cylindrical surface of the drum 28, which is mounted on the drive roller 8. The fastening is performed using screws 26 over the entire width of the drum 28. To protect the elements of the circuit 23 from damage and contamination, the ends of the initial links 2 in 6 pieces are closed with a removable bracket 29 using screws 30. In the additional compartment 11, support rollers 31 are installed in an additional compartment 11 between the lower brush 18 and the body part of the cochlea 6 in the amount of 2 pieces to exclude the intensity of wear of the lower brush 18 during extension and installation of the panel 1. Fastening the rollers 31 to the housing elements of the cochlea 6 is made with screws 26. To prevent unexpected accumulation of atmospheric precipitation in the removable cover 14, drain holes 32 are made, arranged in a row along the entire width in place 33, in the lower part of the covers and 14. The number of drain holes 32, as an embodiment, is 10.

The power drive 10 (Fig. 5) for transmitting torque to the drive roller 9 of the scroll 6 and the drive roller 8 is made so that the reversing electric motor 34 is kinematically connected to a reduction gear 35, the input shaft 36, with third-party drive wheels 37 of the roller chain drive 23. The output shaft 38 of the cochlea 6 is kinematically connected to the chain gear 39, to the clutch 40 and then to the drive roller 8. The chain gear 39 is mounted in the guard 41, articulated with the casing 42. The cochlea 6 is closed on both sides by the casing posts 43 for fastening its element ntov laying installation units 2 and rollers 31. The electric motor 34 with reducing gear train 35 is installed in the cabin near the fence 44, forming a passage for boarding-disembarking. The lower part of the gearbox 35 with the output shaft 45 is located in the additional compartment 11 for connection with the input shaft 36. The motor 34 is switched off remotely from the operation of the limit switches 46, 47 when the panel 1 is pulled out and laid in the additional compartment 11. The reduction gearbox 35 contains case 48, assembled in two parts: the upper part is located in the carriage interior on the floor 12 and the lower part is under the floor 12 near the fence 44, in the additional compartment 11. In the upper part, the output shaft 49 of the kinematic reversible electric motor 34 The esk is connected to the coupling 50, a two-stage reduction gear, which contains cylindrical wheels 51, 52 and wheels 53, 54. The shaft of the gear 54 is kinematically connected to a bevel gear containing the wheels 55, 56. The wheel 56 is mounted on the shaft 57, the output of which located in the lower part of the housing 48. The shaft 57 is kinematically connected to the worm gear containing the worm 58 and the wheel 59 mounted on the output shaft 45. The upper part of the housing 48 together with the electric motor 34 is closed by a removable casing 60. Fastening the casing 60 to the floor 12 performed with bolts 61 and washers 62.

The fastening of the fence 41 to the casing 42, the racks 43 to the housing elements of the additional compartment 11 is made using bolts 61 and washers 62. The fastening of the two parts of the housing 48, as well as the housing itself to the floor 12, is made using bolts 63 and washers 64. Fastening the removable cover 14 to the housing element of the compartment 11 is made using bolts 65 and washers 66.

The landing landing platform works as follows:

- the tram car moves. The links 2 and the sheet material 4 are laid in the additional compartment 11 in the cochlea 6 and rolled up into a roll 7 on the drive roller 8;

- Before stopping the tram car, passengers with disabilities or prams signal the driver through an internal wired connection to extend the landing site. Such a signal to the driver can be given by pressing the "signal to the driver" button located inside the cabin and outside.

The driver, having received a signal for disembarkation of passengers after the car is stopped, performs a remote control operation to open the doors while sliding panel 1 onto the stop platform. As a result, the electric motor 34 is turned on. The rotational moment is transmitted to the reduction gear 35 and further along the kinematic chain: input shaft 36, drive shaft 9 with third-party drive wheels 37 of the roller chain drive 23, output shaft 38 of the scroll 6, chain transmission 39, clutch 40 and the drive roller 8. With the start of operation of the chain 23, the pivotally connected links 2 and the sheet material 4 are advanced from the slot 16 of the additional compartment 11 onto the stopping platform. When the links 2 with the sheet material 4 are pulled out of the slot 16 onto the stopping platform, a meeting with an obstacle located on the platform may occur. In this case, the connecting links with unidirectional mobility after contacting the first link with the obstacle will begin, due to the hinge, to bend upward, without increasing the contact force with the obstacle, forming the principle of the giving link. After removing the obstacles in the path of the extension of the links 2 and the sheet material 4 will take the same rigid flatness of the panel 1. During landing, the load applied on top of the panel 1, due to the hollows 24 and protrusions 25 on the side surfaces of the link 2 will increase the rigidity of the upper surface, excluding unforeseen shift of these links among themselves. In the process of extension, the rollers 31 and 27 respectively work, the limit switch 47 is activated and the electric motor 34 stops working. At the end of the landing using the panel 1, it remains extended until the end of the landing. The driver simultaneously remote control the closing of the doors performs the operation of laying the panel in the additional compartment 11. As a result of the reverse, the electric motor 34 transmits torque to lay the panel in the compartment 11. The retractable links 2 and the sheet material 4 are cleaned with brushes 17, 18, and the rotatable rollers 27 and 31 reduces the friction of the moving elements of the landing site. The sheet material 4 is rolled into a roll 7 onto the drive roller 8, and the links 2 are placed in the cochle 6. The operation of the limit switch 46 turns off the electric motor 34. The entrance doors are closed, the panel 1 is laid in the compartment 11, and at the same time a signal is sent to permit the car to move.

The proposed design of the retractable landing pad with mechanized transformation into a compact form in the folded state of the transport position, controlled remotely, improves the convenience of boarding and disembarking passengers with disabilities or prams, as well as its operational reliability.

Tests on a prototype low-floor tram car in the Yekaterinburg tram-trolleybus department confirmed an increase in the convenience of boarding and disembarking passengers with prams, disabled people and elderly people.

Claims (3)

1. The landing boarding platform of a vehicle, mainly a tram car with a low floor, including a sliding panel, support rollers, a power drive to extend the panel, an anti-sticking element, characterized in that the sliding panel is made of series-connected links with unidirectional articulated mobility, allowing in the working - extended position, to provide an unbending rigid condition; when advancing to the upper surface of these links, a layer of flexible sheet material with the non-slip surface, fixed by the leading edge with the first link, for folding is folded so that the links fit into the cochlea with the drive roller, and the flexible sheet material is folded into a coil with a drive roller, while the coils drive roller and the roll drive roller are kinematically connected to the power drive extension of the panel, made of two parts so that one of them is located on the floor in the tram car, and the second is under the car floor near the opening of the entrance doors in the additionally formed compartment for installing a snail with a drive roller and a roll with a drive roller, and the lower part of the compartment is closed with a removable cover. 2. The retractable landing pad according to claim 1, characterized in that the link with unidirectional articulated mobility is made as a link with a parallel hinge located at the end ends by installing rollers, on which, in turn, the roller chain elements are mounted, and on three lower pieces of support rollers are installed in the lower case part of the first link. 3. The sliding landing platform according to claim 1, characterized in that on the case of the input slot of the additional compartment, support rollers are installed in the amount of two pieces and an anti-sticking element in the form of brushes.

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