RU2753770C1 - Device for automatic folding of the pantograph of the electric moving staff in the emergency mode of the current collector and the pantograph - Google Patents

Abstract

FIELD: vehicles pantographs.

SUBSTANCE: inventions group relates to pantographs for vehicles. The device for automatic folding of the pantograph of the electric rolling stock in the emergency mode of the current collection is made with the possibility of integrating it into the lifting and lowering mechanism of the pantograph and contains a cable and a ratchet with a pawl, where one of the ends of the cable is attached to the ratchet pawl. The pantograph of the electric rolling stock includes a base, a lower frame with a cross member, an upper frame, a collector assembly, a lifting and lowering mechanism of the upper and lower frames, and a pantograph automatic folding device. The lower frame with the cross member is pivotally connected to the base and the lower link. The upper frame is pivotally connected to the lower frame and the upper link. The collector assembly is located on the upper frame, connected to the upper link and includes a skid mounted on carriages mounted on a bar with a beak. The lifting and lowering mechanism of the upper and lower frames includes an actuator, a spring and an involute connected to the spring through a chain.

EFFECT: ensuring fast automatic folding of the pantograph and increasing the reliability of the emergency folding device of the pantograph and the pantograph itself.

7 cl, 3 dwg

Description

FIELD OF TECHNOLOGY.

The invention relates to electric transport, namely to devices for automatic folding of the pantograph of electric rolling stock (UAST) pantographs of electric rolling stock in emergency mode of current collection and to pantographs with this device and can be used, for example, on tram transport.

PRIOR ART.

The prior art discloses numerous UFTAs mounted on pantographs of electric rolling stock.

In the patent RU 199759 (JSC "S Electrotransport") a pantograph for electric rolling stock is disclosed containing a base, a collector assembly including a bar, a runner and carriages, lower and upper lightweight movable frames, where both frames are hingedly connected to each other, and the lower frame is hingedly connected with a base, lower and upper links and a lifting and lowering mechanism of the lower and upper movable frames, including an air spring. The air supply to the pantograph is carried out by a common line from an external source, from the line there are sleeves, one of which (hereinafter referred to as sleeve 1) supplies air to the pneumatic spring, which ensures the raising and lowering of the pantograph in standard situations.

UAST includes shear fingers, which are a calibrated hollow metal cylindrical body with an air channel, grooves and threads at one of the ends of the shear pin. In the body of the shear pin, two grooves are made and at one of the ends of the pin there is a thread. An air supply hose from the air line (hereinafter referred to as hose 2) is attached to the thread, which provides automatic emergency lowering of the pantograph when the runner is torn off the carriages.

UAST is connected to the pantograph as follows: the shear pin is fixed on the movable part of the carriages (the fixed parts of the carriages are located on the bar), and a runner is installed on the grooves of the shear pin.

UAST works as follows: when the runner is torn off the carriages, the shear pin collapses in the thinnest part of the finger's body - grooves, due to which compressed air escapes through the destroyed shear pin into sleeve 2, the pressure of compressed air in the line drops, the pressure switch is triggered and closes the pneumatic valve installed on the line and the pantograph is lowered.

The patent notes that the presence of UAST increases the safety of the pantograph operation.

The disadvantages of the known technical solution is that the known-UAST can be implemented only for pantographs, the lifting and lowering of which is provided by pneumatics.

The closest UAST and a pantograph with this device are disclosed in patent ES 1074471 (U) (SCHUNK IBERICA SA).

The patent discloses UAST for electric rolling stock, consisting of a trigger / lockable hook, which is a pin with a groove, made with the possibility of breaking the pin in the place of the groove. The trigger connects the cable and the involute.

The pantograph of the electric rolling stock, in accordance with this patent, contains a base, an upper and a lower frame, respectively, with upper and lower rods, a current collector located on the upper frame and including a runner mounted on the carriages, a spring connected through a cable with an involute, an actuator and device for automatic folding of the pantograph, in the form of a trigger connecting the cable and involute.

The known technical solution works as follows. The runner collides with an obstacle while moving. The impulse from the runner sharply folds the pantograph (the movable frames and rods are folded), the lifting springs are stretched in a jerk, the trigger (shear pin) at the end of the involute does not withstand the tension of the spring and breaks. The lifting springs are compressed, the cable falls to the base, while the movable frames and rods fold under their own weight.

The disadvantages of the closest technical solution are as follows:

• The inability to adjust the UAST response depending on the impulse value - for the shear pin, the UAST response depends on the size of the groove - unregulated, which may cause false alarms or if the runner breaks, the shear pin may not break, and therefore the current collector unit will not go down.

• The impact of the movable frames on the base of the pantograph when it is fully folded, which will lead to their deformation.

• UAST operation depends on the height positions of the runner, because the destruction of the shear pin depends on the tensile force of the spring (in the lower position of the runner, the spring is maximally stretched and at the same time the pantograph will fold with a small impulse, in the upper one - minimally, i.e., with the same impulse it may not fold).

All of the above does not ensure reliable operation of the pantograph emergency folding device, thus, does not ensure reliable operation of the pantograph.

DISCLOSURE OF THE INVENTION.

The technical objective of the invention is to eliminate the above disadvantages and increase the reliability of the emergency folding device for the pantograph, and, consequently, the pantograph.

The problem is solved by a device for automatically folding the pantograph of an electric rolling stock in an emergency mode of current collection, made with the possibility of integrating it into the lifting and lowering mechanism of the pantograph, and containing a cable and a ratchet with a pawl, where one of the ends of the cable is attached to the ratchet pawl.

In particular embodiments of the invention, the problem is solved by a device in which the cable is placed in a flexible sheath.

The task is also solved by the pantograph of the electric rolling stock, including the base; a lower frame with a cross member pivotally connected to the base and the lower link; an upper frame pivotally connected to the lower frame and the upper link; placed on the upper frame and connected to the upper rod, a current-collecting unit, including a skid mounted on carriages mounted on a rod with a beak; lifting and lowering mechanism of the upper and lower frames, which includes an actuator, a spring and an involute connected to the spring through a chain; and a device for automatic folding of the pantograph, where the device for automatic folding of the pantograph comprises a cable and a ratchet with a pawl, and the said cable is attached at one end to the ratchet pawl, the ratchet is located on the cross member of the lower frame, the involute is attached to the ratchet, and the second end of the cable is connected to the upper link.

In particular embodiments of the invention, the problem is solved in a pantograph, in which the cable is placed in a flexible sheath.

In other particular embodiments of the pantograph, the upper link and the lower frame are pivotally connected by means of a bracket fixed to the lower frame and made integral with a sleeve fixed to the upper frame.

The top rod of the pantograph can be passed through the sleeve.

The end of the cable in the pantograph can be connected to the upper link through the cable holder made with a pivot shaft.

BRIEF DESCRIPTION OF DRAWINGS.

FIG. 1 shows a general view of a pantograph with UAST.

FIG. 2 shows the view B (the joint of the cable with the ratchet).

FIG. 3 shows view A (hinge joint of the upper and lower frames).

1. Foundation

2. Lower frame with cross member

3. Lower thrust

4. Upper frame

5. Upper thrust

6. Current collector unit

7. Runner

8. Carriage

9. Barbell with beak

10. Actuator

11. Spring

12. Chain

13. Evolvent

14. Rope in a flexible sheath

15. Ratchet

16. Dog

17. Sleeve

18. Bracket

19. Cable holder with pivot shaft

20. Key

21. Ratchet pin

IMPLEMENTATION OF THE INVENTION

The invention includes a device for automatically folding the pantograph of an electric rolling stock in an emergency mode of current collection, made with the possibility of integrating it into the lifting and lowering mechanism of the pantograph and the pantograph with this device.

The pantograph of the rolling stock (see Fig. 1) includes a base (1), a lower frame with a cross member (2), pivotally connected to the base (1) and the lower link (3), as well as an upper frame (4). On the upper frame there is a current-collecting unit (6) connected to the upper link (5). The collector assembly consists of a skid (7) mounted on elastic elements - carriages (8) mounted on a bar with a beak (9), pivotally connected to the upper frame (4) and the upper rod (5). The upper frame (4) is pivotally connected to the lower frame (2) by the lower rod (3).

To raise and lower the upper and lower frames, a lifting and lowering mechanism is provided in the pantograph, which consists of an actuator (10) that lowers the frames and a spring (11) that provides lifting. The spring (11) through the chain (12) interacts with the involute (13).

The device for automatic folding of the pantograph (Fig. 2) consists of a cable (14) and a ratchet (15) with a pawl (16). One end of the cable (14) is fixed to the pawl (16) of the ratchet (15). It is desirable that the cable be placed in a flexible sheath to avoid damage to it.

The device for automatic folding of the pantograph is integrated into the lifting and lowering mechanism as follows (Fig. 2, 3). The upper rod (5) (Fig. 3) is pivotally connected with one end to the beak of the rod (9), the other with a cable (14) located inside a flexible shell fixed to the lower frame (2).

The upper link (5) has the possibility of longitudinal movement in the sleeve (17), which is an integral part of the bracket (18), which is pivotally attached to the lower frame (2). A cable holder with a pivot shaft (19) is attached to the bracket (18) and the upper link (5), which provides the middle position of the upper link (5) and the vertical position of the cable (14).

The ratchet (15) (Fig. 2) is installed on the lower frame cross member (2) and is secured against turning by a key (20). An involute (13) is fixed on the ratchet (15), to which the force is transmitted from the spring (11) through the chain (12). To rotate the involute (13), together with the ratchet (15), a pawl (16) is installed, which is connected to a cable (14).

In the working position of the pantograph, the force from the stretched spring (11) is transmitted to the involute (13) through the chain (12). The torque from the involute (13) relative to the axis of the lower frame shaft with the cross member 2 is transmitted to the ratchet (15) by means of the pawl (16). On the lever of the pawl (16), a cable (14) is fixed, which is constantly in a taut state, and in order to move it, an impulse must be applied to the cable (14), which is able to overcome the friction force of the pawl (16) on the ratchet (15). The magnitude of this impulse is calculated based on the impulse value set for the emergency operation of the current collector applied to the runner (7).

When the UAST is triggered, the involute 13 rotates on the ratchet 15 under the influence of the spring 11. To limit the rotation of the involute 13 relative to the ratchet 15, there is a ratchet pin 21, which allows the spring 11 to be partially compressed so that the force of the spring 11 is sufficient to extinguish the kinetic energy of the falling movable frames 2, 4 with rods 3, 5 and collector assembly 6 to avoid a hard shock.

It should be noted that the UAST in accordance with the invention can be integrated into practically any lifting and lowering mechanism, and thus integrated into any pantograph, not only in accordance with the present invention.

The pantograph works as follows.

In the working position of the pantograph, the pre-stretched spring (11), compressing through the chain (12), transfers a given force to the involute (13), which, by turning the shaft (cross member) of the lower frame (2), raises the frames (2) and (4) together with rods (3) and (5) and a current collection unit (6), as a result of which the skid (7) with a certain pressure acts on the contact wire and provides current collection. When the electric rolling stock moves, the runner (7) slides along the contact wire in the normal mode, the carriages (8) and the beak of the rod (9) move within acceptable limits, compensating for minor irregularities of the contact wire, providing current collection. When the runner (7) hits objects located below the level of the contact wire (misaligned fittings of the contact network, tree branches, etc.), an emergency mode of operation of the pantograph is created, in which the runner (7) collides with an object located below the level of the contact wire, the bar with a beak (9) is turned over the permissible norm relative to its pivot axis on the upper frame (4), the upper thrust (5) begins to move in the sleeve (17) (to the left or to the right, depending on the direction of rotation of the beak of the bar (9)) pulling behind itself the cable (14) and providing its additional tension, the cable (14) pulls the lever of the pawl (16), the pawl (16) disengages ensuring the separation of the involute (13) from the ratchet (15), while the involute (13) is on the ratchet (15) turns until the ratchet pin (21) hits the involute (13), the tension of the lifting spring (11) decreases and the frames (2) and (4) fold under their own weight.

The invention makes it possible, regardless of the version of the lifting and lowering drive of the pantograph, to ensure rapid automatic folding of the pantograph of an electric rolling stock in emergency mode of its operation, to increase the reliability of the emergency folding device of the pantograph and the pantograph itself, as well as to ensure the safety of the contact network during emergency current collection.

Claims (11)

1. A device for automatic folding of the pantograph of an electric rolling stock in an emergency current collection mode, made with the possibility of integrating it into the lifting and lowering mechanism of the pantograph and containing a cable and a ratchet with a pawl, where one of the ends of the cable is attached to the ratchet pawl. 2. The device according to claim 1, in which the cable is placed in a flexible sheath. 3. Pantograph of electric rolling stock, including base; a lower frame with a cross member pivotally connected to the base and the lower link; an upper frame pivotally connected to the lower frame and the upper link; placed on the upper frame and connected to the upper rod, a current-collecting unit, including a skid mounted on carriages mounted on a rod with a beak; lifting and lowering mechanism of the upper and lower frames, which includes an actuator, a spring and an involute connected to the spring through a chain; and device for automatic folding of the pantograph, where the device for automatic folding of the pantograph contains a cable and a ratchet with a pawl, and the said cable is attached at one end to the ratchet pawl, the ratchet is located on the cross member of the lower frame, the involute is attached to the ratchet, and the second end of the cable is connected to the upper link. 4. Pantograph according to claim 3, in which the cable is placed in a flexible sheath. 5. The pantograph according to claim 3, in which the upper link and the lower frame are pivotally connected by means of a bracket fixed to the lower frame and made in one piece with a sleeve fixed to the upper frame. 6. The pantograph according to claim 5, wherein the top link is passed through the sleeve. 7. Pantograph according to claim 3, in which the end of the cable is connected to the upper link through the cable holder made with a pivot shaft.

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