MX2010014437A - Automatic parking brake applied in pneumatic train. - Google Patents

Abstract

The present invention refers to a pneumatic braking system for automating the train parking by an electromechanical mechanism in order to perform the immobilization function in the train when this is in the garage or when it has to be parked for a long period of time. The present invention increases the availability of the parking brake in trains through this electromechanical and automatic mechanism and provides accessibility to the driver upon parking the train and immobilizes the same for a long period of time without risks of being displaced. Additionally, the fact of being automatic removes the need of turning 40 times the mechanism of the train.

Description

AUTOMATIC PARKING BRAKE APPLIED IN A PNEUMATIC TRAIN Field of the Invention The present invention is related to brake systems for train parking with electromechanical action and electronic control and, more particularly, that has the pneumatic brake systems of trains type NM83B.

Background of the Invention The system for conventional parking brake that is used and is currently installed in trains, is essentially made up of a mechanism that is manually operated, in which it is required to give approximately 40 laps to achieve the immobilization action of the train when it is intended to park it . Said action generates a loss of time for the train to be braked in addition to the effort involved in achieving the action of turning the braking key 40 times.

When the trains are in the garage, they are parked with the conventional FU emergency brake, worse, when the air is finished due to leaks or other reasons, the train is free and in danger of moving unwanted, so in any At the moment these can be displaced, causing considerable damage to both the facilities and trains, as well as accidents that can have enormous consequences.

As a technological reference, there are other related systems that can be compared, but are not the same as those described by the present invention, such as: Mexican Patent No. 224783 - "BRAKE OF HAND OF ( AUTOMATIC APPLICATION ", refers to rail vehicles with hand brake.

Mexican patent No. 224164 - "BRAKE SHOE WITH INSERT UNITED TO A SUPPORT PLATE ", a composition of a brake shoe for use in a railway vehicle The Mexican patent document No. 258970 - "METHOD AND BRAKING DEVICE AND MA EJO ", refers to an assembly of aircraft landing gear The Mexican patent No. 215703 - "BRAKE OF INERTIA OF TRANSMISSION WITH BALL RAMP OPERATION ", the transmission uses a ball-ramp mechanism.

Mexican Patent No. 249059 - "BRAKING SYSTEMS TIRE WITH ELECTRICAL PNEUMATIC CONTROL INTERCONNECTION SYSTEM ", an interconnection system for electric terminals of locomotive train and car line by pneumatic means.

Mexican patent No. 228307 - "BRAKE ASSEMBLY OF PARKING APPLIED BY SPRING THAT HAS A FEATURE OF QUICK RELEASE MANUAL ", parking brake applied by spring in the absence of an air source.

- Mexican patent No. 220728 - "EMULATION BRAKE FOR RAILROAD ", are electrically controlled pneumatic wagons.

Mexican patent No. 211821 - "METHOD AND APPARATUS FOR CONTROL ELECTRONICALLIC BRAKES IN TRAINS USING AN EXISTING ELECTRONIC AIR BRAKE ", electro-pneumatic brake control in a railway train The 'Mexican Patent No. 128886 - "SYSTEM IMPROVEMENTS ELECTRO-BRAKE ", refers to improvements to electro-brake system, applicable to braking vehicles-trailer, Document No. WO / 2004/071829 - "ELECTRICALLY OPERABLE VEHICLE PARKING BRAKE DRIVE", this system has a gear train, optionally, driven by a reversible electric motor or a manual member.

, Document No. (WO / 2004/044445) - "ELECTRO-MECHANICAL ACTUATOR FOR AN ELECTRICALLY ACTUATED PARKING BRAKE", electric drive brake device with a motor having a drive shaft, and a gear train which provides the minus a mechanical output of the actuator.

Document No. WO / 2010/060725 - "ELECTROMECHANICALLY ACTUATED DISK BRAKE FOR MOTOR VEHICLES" refers to a disc brake.

On the contrary to what exists in the art, according to the present invention, the gearmotor is electronically controlled, performing the function of transmission of motive power to the worm for its application of the parking brake that is mechanical.

Summary of the Invention Thus, one of the objectives of the present invention is to automate the parking brake of the trains by means of an electromechanical mechanism controlled by digital electronics in order to perform the function of immobilization in the train when it is in a garage or when it needs to be parked by a long time.

Also, another objective of the present invention is to increase the availability of parking braking of the trains through this electromechanical and automatic mechanism.

Another object of the present invention is to provide an automated parking system that works satisfactorily under the operating environmental conditions, as well as in the topographies of the train system.

A further objective of the present invention is to provide a braking system that also meets the reliability and availability necessary to the brake system of trains.

Moreover, another objective of the invention is to provide an automated parking system that provides accessibility for the driver when parking the train with what immobilizes for a prolonged time, without any risk of it moving. In addition to being automatic, it would no longer perform the activity of giving 40 laps to the train mechanism.

In the same way, the parking system according to the present invention guarantees the non-obsolescence of the equipment and the existence in the spare parts market and, likewise, the parking system according to the present invention increases the safety and availability of the equipment .

Brief Description of the Figures of the Invention Figure 1 is a block diagram of the pneumatic braking system for automatic train parking according to the present invention.

Figure 2 refers to a general schematic diagram where a comparison is made between the current system and the system to which the invention relates.

Detailed description of the invention The automatic parking brake system refers to an electronic electrical system (14) that provides the driving force and which in turn is coupled to a mechanical system (1,2) performing the longitudinal movement for the transfer of force by means of of chicotes (3) to the levers (4) of the brake mechanism.

The electromechanical brake for automatic train parking comprises the following: - Mechanical system consisting of: Worm screw (1) Threaded shaft that allows the displacement of the kite.

Kite (2) Has the function of dragging the chicotes Chicotes (3) Element that allows the action of longitudinal drag to the levers of the brake.

Ladybugs (9) Toothed wheel that allows the movement circulates for the turning of the worm.

Chains (15) Mechanical element that engages and allows circular movement to the ladybugs.

Levers of presence (8) These are elements that indicate the position of the motor either in application or release of the parking brake.

Drive levers (4) Mechanisms that provide the force applied to the brake pads.

Electrical-electronic system consisting of: Control circuit (11) Electronic system that controls the operation of the electromechanical mechanism according to its programming, turning in the direction of application and / or release of the parking brake, as well as the positioning of the brake and signaling them End of stroke switch (8) Electromechanical switch that sends the control signal to the electronic control.

Pressure switch (13) Electro-pneumatic device, which sends electrical signal, to the control circuit, indicating the air pressure in the balance pipe, for the decision of application and / or release of the parking brake.

Switching command levers (12) They are electromechanical devices that allow the driver to perform the function of application execution and / or release of the parking brake.

These two systems in combination mechanical, electrical and electronic together make the longitudinal movement of the whip with a force applied to the lever, the brake on which rests on the safety wheel using the brake shoes and thus immobilize or release .

Operation of the device The system operates according to the position of the folding command switch so that the control on the basis of its program drives the braking mechanism or released through the gearmotor, transmitting its movement to the worm, by means of a catarina / chain and the kite the chicotes are slid longitudinally and this in turn pulls and / or pushes the brake levers of the brake pads.

Another function, which has this system is to detect the pressure in the linkage of compressed air by means of a pressure switch, indicating the pressure of the air that is in the storage cylinder, presents two cases.

Air cylinder with normal working pressure the brake is released. The air cylinder with low pressure applies the parking brake.

If the brake is applied by pressure switch and it is necessary to move the train to the workshop, the system has a relief lever to release the brake and being in the workshop it is necessary to return this lever to normal, to continue operating normally and its application It is in the hands of the driver performing it from the cabin according to where the controls are located.

System selection The driving force exerted on the chicotes for the dragging of the levers of the parking brake, was selected among several systems for application in two train bogies, this was used in tow for accessibility, being the following: Mechanical electrical Electric pneumatic Mechanical tire Mechanical electrical system This system was selected because a direct current motor with speed reducer was used to drive the brake mechanism through a chain sprocket and the screw would drag the kite, which in turn pulled the chicotes and the mechanism lever as well as the brake shoes.

Pneumatic electrical system No. This configuration was selected because the worm is circular in operation and could not use an air cylinder driven by an internal spring and its control would be electrical-electronic, although the electronics designed would perform the function of application and release of the brake .

Mechanical tire This system would be a cylinder and drive levers to the chicotes, because our configuration is worm screw is not applicable.

Assembling the prototype on the train The cranks that activated the brake mechanism were removed and in its place a gearmotor was installed to exercise the function of the manipulator and thus be able to automate it, so that the driver would no longer be difficult to park the train from the cab.

- - Parts that were removed to install the new mechanism: Crank (7) Arrow (6) Gearbox (5) Catarina (9) Parts that are included in the new device: Motoreductor (10) Ladybugs (9) Electronic control circuit (11) Race terminal microswitch (8) Pressure switch (13) Controls of control (12) Experimental tests Tests have been carried out on the trailer car 3711 of the train with motive M.0478 / 0479 in the visitor's pit for its operation.

This activity was carried out in conjunction with personnel from the Rolling Stock Management and Engineering Management and New projects to verify the application operation and release of the parking brake according to the following program: • Decoupling of sprockets from the gearbox and endless screw of the chicotes.

• Removal of the gearbox from the train frame. - - • Assembly of the gearmotor in the train frame in replacement of the gear mechanism driven by crank.

• Coupling of the Catarina of the gearmotor and with the auger by means of a drive chain.

Alignment of both Catarinas of the gearmotor and worm.

• Tighten coupling screws.

These activities were carried out to corroborate the good functioning and the availability of the automated parking brake.

Results This test was carried out manually / automatically with its feeders to the gear motor for its verification of operation of the parking brake. parking braking application test; this test was carried out with the objective of operability and equipment availability. parking braking release test; this test was carried out with the objective of operability and equipment availability.

Observations Of the interventions carried out in the towing car 3711, the aforementioned parts were removed and the replacement of the proposed equipment and the previous tests carried out at a static level. Their operability and availability were satisfactory, according to what the parking brake was installed for the immobilization. and release of the drive train .0478 / 0479; - - later the dynamic tests will be made. recommendations • For its preventive maintenance it requires the installation of a test button.

· A manual system for possible release in case of failure of the automatic system.

Claims (14)

1. - Automated parking brake characterized because it comprises: a) an electronic electrical system (14) that provides the driving force and which in turn is coupled to; b) a mechanical system (1,2) performing the longitudinal movement for the transfer of force by means of chicotes (3) to the levers (4) of the brake mechanism.

2. - The automated parking brake according to claim 1, wherein the electronic electrical system includes: a control circuit (11) an electromechanical limit switch (8) an electro-pneumatic pressure switch (13) command interrupter levers (12)

3. - The electronic electrical system according to claim 2, wherein the control circuit is programmed so that the operability of the electromechanical mechanism is controlled, by rotating in the direction of application and / or release of the parking brake, as well as the positioning of the brake and signaling them.

4. - The electronic electrical system according to claim 2, wherein the electromechanical limit switch (8) is configured to send a control signal to the electronic control.

5. - The electronic electrical system according to claim 2, wherein the electropneumatic device sends an electrical signal to the control circuit and indicates the air pressure in the balance pipe in order to have adequate information on application and / or release of the brake of parking.

6. - The electronic electrical system according to claim 2, wherein the command interrupter levers (12) are arranged so as to allow performing the execution function of application and / or release of the parking brake.

7. - The automated parking brake according to claim 1, wherein the mechanical system includes one worm (1) a kite (2) chicotes (3) ladybirds (9) chains (15) levers of presence (8) drive levers (4)

8. - The mechanical system according to claim 7, wherein the worm is a threaded shaft that allows the displacement of the kite.

9. - The mechanical system according to claim 7, wherein the kite is arranged so that it can drag the chicotes.

10. - The mechanical system according to claim 7, wherein the chicotes are elements arranged so as to allow the longitudinal dragging action to the brake levers.

11. - The mechanical system according to claim 7, wherein the sprockets are toothed wheels that are arranged in order to allow the movement circulates for the rotation of the worm.

12. - The mechanical system according to claim 7, wherein the chains are the mechanical elements that are coupled and allow circular movement to the sprockets.

13. - The mechanical system according to claim 7, wherein the presence levers are elements arranged so as to signal the position of the engine either in application or release of the parking brake.

14. - The mechanical system according to claim 7, wherein the actuating levers are the mechanisms that provide the force applied to the brake linings.