CN111469875B

CN111469875B - Escape device of subway locomotive

Info

Publication number: CN111469875B
Application number: CN202010323752.7A
Authority: CN
Inventors: 周银妹; 李群力; 马建旺; 丁静
Original assignee: Changzhou Changqing Technology Co ltd
Current assignee: Changzhou Changqing Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2024-07-02
Anticipated expiration: 2040-04-22
Also published as: CN111469875A

Abstract

The invention discloses an escape device of a subway locomotive, which comprises an escape door, a door lock device, an unlocking device and an installation door frame, and is characterized in that: the system also comprises a top hinged linkage and an escape ramp assembly; the upper part of the escape door is provided with a transparent window. The top hinged linkage is fixedly arranged on a door opening of the subway locomotive. The upper part of the escape door is rotationally connected and arranged on a door opening of the subway locomotive through a top hinged linkage device. The unlocking device is used for controlling the door lock device to enable the escape door to be separated from the installation door frame and turned upwards to be opened. The left side and the right side of the escape door are respectively provided with a gas spring, and the gas springs are used for keeping the escape door in a turnover open state. The escape ramp assembly includes a pedal frame assembly and a pedal. The pedal frame assembly is hingedly connected to the lower portion of the mounting doorframe. The pedal is arranged on the pedal frame assembly, and the escape ramp is formed after the pedal frame assembly is unfolded.

Description

Escape device of subway locomotive

Technical Field

The invention relates to the technical field of subway locomotives, in particular to an escape device of a subway locomotive.

Background

In subway riding travel, emergency situations such as power failure, fire and the like can be encountered. When this occurs, the boarding and disembarking doors are normally not opened due to power outage. Therefore, the corresponding manual door opening is arranged on the subway locomotive for escape. Currently, escape devices on the market are arranged at the head of a locomotive, and most of escape devices adopt a downward-turning escape door. The escape system comprises a door frame and an outward-turning escape door, wherein the door frame is fixed on a vehicle body, the outward-turning escape door is hinged on the door frame through the lower part, the front end of the outward-turning escape door is hinged with a second-stage turning pedal, and two sides of the second-stage turning pedal are respectively provided with armrests which are automatically opened along with the expansion of the escape door and the second-stage turning pedal. Because the escape door is directly hinged on the door frame, the final position of the escape door after being overturned is influenced by the position of the coupler, the escape door in the escape systems is only suitable for vehicle types with more gentle arc shapes of the vehicle heads, and if the arc shapes of the vehicle heads are larger, the thickness of the escape door is increased, and interference with the coupler can be generated after the escape door is overturned. Chinese patent document CN105172815B (patent application No. 201510582619.2) discloses a "general escape system for a subway locomotive", which also uses an escape door to turn down and open. The forward-turning escape door needs to bear the function of a pedal, so that a window cannot be arranged on the escape door, the visual field of the locomotive head is greatly influenced in a closed state, and whether an object is blocked at the front part of the escape door cannot be judged when the escape door needs to be opened, and a certain potential safety hazard exists.

Disclosure of Invention

The invention aims to provide an escape device of a subway locomotive, which has a simple structure and can be provided with a window on an escape door.

The basic technical scheme for realizing the aim of the invention is as follows: the utility model provides an escape device of subway locomotive, includes escape door, door lock device, unlocking device and installation door frame, and the fixed setting of installation door frame is in the door opening of subway locomotive, and door lock device is used for locking fixed connection with the escape door lower part and installation door frame, and its structural feature is: a top articulation linkage and an escape ramp assembly are also included.

The upper part of the escape door is provided with a transparent window. The top hinged linkage is fixedly arranged on a door opening of the subway locomotive. The upper part of the escape door is rotationally connected and arranged on a door opening of the subway locomotive through a top hinged linkage device. The unlocking device is used for controlling the door lock device to enable the escape door to be separated from the installation door frame and turned upwards to be opened. The left side and the right side of the escape door are both provided with gas springs, one ends of the gas springs are hinged on the escape door, the other ends of the gas springs are hinged on corresponding parts of the installation door frame, and the gas springs are used for enabling the escape door to be kept in a turnover open state. The escape ramp assembly includes a pedal frame assembly and a pedal. The pedal frame assembly is hingedly connected to the lower portion of the mounting doorframe. The pedal is arranged on the pedal frame assembly, and the escape ramp is formed after the pedal frame assembly is unfolded.

The technical scheme based on the basic technical scheme is as follows: the door lock device comprises a lock plunger, an unlocking rotary disc, a locking pin pull rod, a lock plunger limiting clamp and a door lock mounting seat.

The lock bolts are fixedly arranged on the left side and the right side of the lower part of the installation door frame and extend into the installation door frame from lock bolt holes on the installation door frame. The lock bolt is a cylinder shaft.

The unlocking turntable is rotatably arranged in the middle of the door lock mounting seat. The two locking pins are respectively arranged on the left side and the right side of the door lock mounting seat in a sliding way, and are arranged along the left and the right directions along the axis of the two locking pins. The locking pin pull rods are two, one locking pin pull rod is used for connecting the locking pin positioned on the left side and the unlocking turntable in a transmission mode, and the other locking pin pull rod is used for connecting the locking pin positioned on the right side and the unlocking turntable in a transmission mode, so that the unlocking turntable is rotated, and the two locking pins synchronously and reversely move. And a locking tension spring is arranged between the locking pin pull rod and the door lock mounting seat and is used for moving the locking pin pull rod outwards so as to enable the locking pin to extend outwards. The two lock bolt limiting clamps are respectively arranged on the left side and the right side of the door lock mounting seat in a rotating mode. The lock plunger limiting card comprises a U-shaped locking part and a limiting part. The front part of the lock plunger limiting clamp is provided with a corresponding locating pin. The lock plunger limiting card keeps the U-shaped opening towards the rear upper side through the corresponding torsion spring.

The technical scheme based on the corresponding technical schemes is as follows: the door lock device further comprises an emergency unlocking handle, the emergency unlocking handle is fixedly arranged on the unlocking turntable, and the emergency unlocking handle is pulled to enable the unlocking turntable to rotate.

The technical scheme based on the corresponding technical schemes is as follows: the door lock device further includes an external unlocking push rod and an external unlocking link. The external unlocking push rod is arranged on the left side of the door lock mounting seat in a sliding way along the left and right direction by the axis of the external unlocking push rod, the external unlocking connecting rod is in transmission connection between the external unlocking push rod and the locking pin pull rod positioned on the left side, and the locking pin pull rod is driven to move by pushing the external unlocking push rod, so that the purpose of unlocking can be achieved.

The technical scheme based on the corresponding technical schemes is as follows: the unlocking device comprises an unlocking push rod. The two ends of the unlocking push rod are rotatably arranged on the escape door, the axes of the unlocking push rod are mutually parallel to the rotation axes of the unlocking push rod, and the unlocking push rod is fixedly connected with an unlocking rotary table of the door lock device through a steel wire rope, so that when the unlocking push rod is pushed upwards to rotate, the steel wire rope is driven to pull the unlocking rotary table to rotate for unlocking.

The technical scheme based on the corresponding technical schemes is as follows: the unlocking device further comprises an unlocking protective cover. The left side and the right side of the unlocking protective cover are rotatably arranged in corresponding protective cover pin shaft holes on the escape door through lockable pin shafts. The unlocking protective cover covers the unlocking push rod from the upper part and the front part and is used for preventing the escape door from being opened due to the fact that the unlocking push rod is pushed by mistake. The rotary connection part of the lockable pin shaft is provided with two planes which are parallel to each other front and back, and the two planes are parallel to the axis of the lockable pin shaft. The pin shaft hole of the protective cover comprises a round hole at the upper part and a waist-shaped hole at the lower part, the upper part of the waist-shaped hole is communicated with the round hole, and the axis of the waist-shaped hole is arranged along the up-down direction. The width of the waist-shaped hole in the front-rear direction corresponds to the distance between the two planes of the lockable pin shaft.

The technical scheme based on the corresponding technical schemes is as follows: the outer end of the escape ramp assembly is provided with a stay rope for retracting the escape ramp assembly.

The top hinged linkage comprises a winding roll assembly, an escape door mounting arm, a ratchet block linkage pin, a ratchet block and a mounting seat. The take-up reel assembly includes a first drive gear and a second drive gear. The first driving gear is rotatably arranged on the left part of the mounting seat, and a connecting square hole for transmission is arranged on the rotating shaft of the first driving gear. The second transmission gear is rotatably arranged on the left part of the mounting seat and meshed with the first driving gear.

The two escape door mounting arms are respectively called a left escape door mounting arm and a right escape door mounting arm according to the difference of the left and right positions of the two escape door mounting arms. The two escape door mounting arms are coaxially and rotatably arranged on the mounting seat. The escape door is fixedly connected to the two escape door mounting arms. The reel is rotatably arranged on the right part of the mounting seat. The second transmission gear is in transmission connection with the wire winding shaft through a corresponding transmission shaft, and one end of the inhaul cable is fixedly arranged on the wire winding shaft.

The upper part of the ratchet block is rotationally connected and arranged on the left part of the mounting seat, and the ratchet at the lower part of the ratchet block is meshed with the first driving gear under the action of the corresponding torsion spring and is used for enabling the first driving gear to rotate unidirectionally. The right part of the ratchet block is provided with a transmission baffle plate.

The ratchet block linkage pin is arranged on the left escape door mounting arm in a sliding manner along the left-right direction, and is driven by the corresponding compression spring to extend into the lower part of the transmission baffle plate of the ratchet block to the left, so that when the escape door is opened upwards, the ratchet block linkage pin drives the ratchet block to be separated from the first driving gear upwards, and the first driving gear can rotate reversely.

The technical scheme based on the corresponding technical schemes is as follows: the pedal frame assemblies are divided into two groups, and the two groups of pedal frame assemblies are respectively called a left pedal frame assembly and a right pedal frame assembly according to the difference of left and right positions of the pedal frame assemblies.

The left pedal frame assembly includes a left first support bar, a left second support bar, a left first cushioning device, and a left pull bar. One end of the left first supporting rod is hinged and fixedly connected to the left side of the lower portion of the mounting door frame, the other end of the left first supporting rod is hinged and fixedly connected with the left second supporting rod, the left first supporting rod and the left second supporting rod are unfolded to form 180 degrees, and the left second supporting rod is turned upwards to be unfolded. The first buffer in left side adopts tensile cylinder, and tensile cylinder's one end is articulated to be connected on the left side of installation door frame, and the other end is articulated to be connected on the first bracing piece in left side. The left pull rod consists of two connecting rods which are connected together in a hinged mode, one end of the left pull rod is connected to the mounting door frame in a hinged mode, and the other end of the left pull rod is connected to the hinged position of the left first supporting rod and the left second supporting rod in a hinged mode.

The right pedal frame assembly includes a right first support bar, a right second support bar, a right first cushioning device, and a right pull bar.

One end of the right first supporting rod is hinged and fixedly connected to the right side of the lower portion of the mounting door frame, the other end of the right first supporting rod is hinged and fixedly connected with the right second supporting rod, the right first supporting rod and the right second supporting rod are unfolded to form 180 degrees, and the right second supporting rod is turned upwards to be opened. The first buffer on the right side adopts a stretching cylinder, one end of the stretching cylinder is hinged on the right side of the mounting door frame, and the other end of the stretching cylinder is hinged on the first supporting rod on the right side. The right pull rod consists of two connecting rods which are connected together in a hinged mode, one end of the right pull rod is connected to the mounting door frame in a hinged mode, and the other end of the right pull rod is connected to the hinged position of the right first support rod and the right second support rod in a hinged mode.

The pedals have 4, and the 4 pedals are called a first pedal, a second pedal, a third pedal and a fourth pedal from front to back.

The first pedal is fixedly disposed between the front portion of the left second support bar and the front portion of the right second support bar of the pedal frame assembly.

The front portion of the second pedal is rotatably arranged between the left second supporting rod and the right second supporting rod and is positioned behind the first pedal. The rear part of the second pedal is hinged with the third pedal, and the rear part of the third pedal is rotatably arranged between the left first support rod and the right first support rod and is positioned in front of the fourth pedal. A stretching cylinder is arranged between the left side and the right side of the lower rear part of the second pedal and the left side and the right side of the lower front part of the third pedal respectively, and the second pedal and the third pedal play a role in buffering and stretching when being unfolded.

The fourth pedal is fixedly disposed between the rear portion of the left side first support bar and the rear portion of the right side first support bar of the pedal frame assembly.

The technical scheme based on the corresponding technical schemes is as follows: the escape ramp assembly further comprises two groups of opening devices, and the two groups of opening devices have the same structure and both comprise compression springs and supporting platforms. The two groups of opening devices are respectively and fixedly connected on the left side and the right side of the lower part of the mounting door frame by respective compression springs. The supporting platform is fixedly arranged at the upper end of the compression spring, and the compression spring is vertically arranged along the up-down direction. The rear end of the left first support rod is provided with a guide roller, and the rotation axis of the guide roller is parallel to the hinge axis of the left first support rod and the hinge axis of the installation door frame. When the left first support rod and the left second support rod are folded and retracted, the guide roller at the rear end of the left first support rod is pressed down on the support platform of the opening device positioned on the left from the upper direction, so that the compression spring is in a compressed state.

The rear end of the right first support rod is provided with a guide roller, and the rotation axis of the guide roller is parallel to the hinge axis of the right first support rod and the installation door frame. When the right first support rod and the right second support rod are folded and retracted, the guide roller at the rear end of the right first support rod is pressed down on the support platform of the opening device positioned on the right from the upper direction, so that the compression spring is in a compression state.

The technical scheme based on the corresponding technical schemes is as follows: also included is a pedal locking device. The pedal locking device comprises a pedal locking pin, a U-shaped limiting clamp torsion spring, an unlocking spanner and a spanner torsion spring. The pedal locking pin is fixedly arranged on the rear part of the inner side of the right second supporting rod of the pedal frame, extends out to the lower part of the second pedal towards the inside of the frame, and the axis of the pedal locking pin is parallel to the rotation axis of the pedal when the pedal is unfolded. The U-shaped limiting clamp is rotatably arranged on the second pedal through one end of a U-shaped connecting part of the U-shaped limiting clamp, and the U-shaped limiting clamp torsion spring is used for enabling an opening of the U-shaped limiting clamp to be kept in a state parallel to the right second support rod. The lower side of the U-shaped connecting part of the U-shaped limiting clamp is provided with a bayonet. The unlocking spanner is rotatably arranged on the second pedal, and the lower part of the unlocking spanner downwards extends out of the second pedal. The upper portion of unblock spanner is equipped with spacing lug, and spacing lug stretches into in the bayonet socket of U-shaped spacing card for prevent the opening of U-shaped spacing card to open downwards, the spanner torsional spring is arranged in making the spacing lug of unblock spanner keep in the bayonet socket.

The invention has the following beneficial effects: (1) The escape device of the subway locomotive has a simple structure, and the escape door is opened upwards, so that a window can be arranged on the escape door, the visual field of the escape device is greatly improved, and the adaptation reliability is further improved. (2) The lower part of the escape door of the escape device of the subway locomotive is provided with the illuminating lamp, and the illuminating lamp is positioned above the pedal when being opened, so that the escape and rescue are facilitated. (3) The door lock device of the escape device of the subway locomotive is provided with the emergency unlocking handle, and when the unlocking device fails and cannot be unlocked, the emergency unlocking handle can be used for unlocking, so that the safety and the reliability of use are further improved. (4) The escape device of the subway locomotive is provided with the external unlocking push rod, the escape door is unlocked through the outside, and when an internal person cannot operate, the escape door can be opened from the outside, so that the use safety is further improved. (5) The unlocking device of the escape device of the subway locomotive is provided with the unlocking protective cover, so that accidents caused by the fact that the escape door is opened due to the fact that the unlocking push rod is touched by mistake can be avoided. (6) The top hinged linkage device of the escape device of the subway locomotive is simple in structure, and the first driving gear is unlocked through the ratchet block linkage pin when the escape door is opened, so that the pedal frame assembly is released. (7) The escape ramp component of the escape device of the subway locomotive is provided with the buffer device, so that the ramp is more stable when being unfolded, and damage is not easy to cause. (8) The escape ramp component of the escape device of the subway locomotive is provided with the pull rod, so that the bearing capacity of the ramp is improved. (9) The first pedal and the fourth pedal of the escape ramp component of the escape device of the subway locomotive are fixedly installed, and the second pedal and the third pedal are locked by the pedal locking device after being unfolded, so that the smoothness and the stability of the ramp are ensured, and the use safety is greatly improved.

Drawings

Fig. 1 is a schematic structural view of an escape device of a subway locomotive according to the invention.

Fig. 2 is a perspective view of the escape device of the subway locomotive in an unfolded use state.

Fig. 3 is a schematic view as seen from the rear left of fig. 2.

Fig. 4 is a schematic structural view of the escape door.

Fig. 5 is a schematic structural view of a top articulation linkage.

Fig. 6 is a schematic view of the escape door when viewed from the rear upper side.

Fig. 7 is a schematic structural view of the door lock device.

Fig. 8 is a schematic view of the right part of the door lock device when viewed from the upper right side of fig. 7.

Fig. 9 is a schematic view of the left part of the door lock device when viewed from the upper left front of fig. 7.

Fig. 10 is a schematic structural view of the unlocking device.

Fig. 11 is a schematic structural view of the top hinge assembly.

Fig. 12 is a schematic perspective view of the structure as seen from the upper left front of fig. 11.

Fig. 13 is a schematic view of a structure in which a door frame is mounted when viewed from the front.

Fig. 14 is a schematic view of the escape ramp assembly as deployed and with a doorframe installed.

Fig. 15 is a schematic structural view of a pedal of the ramp assembly.

FIG. 16 is a schematic structural view of a pedal frame assembly of the ramp assembly.

Fig. 17 is a schematic structural view of the pedal locking device.

The reference numerals in the drawings are:

an escape door 1, a transparent window 1-1, an illuminating lamp 1-2,

A door lock device 2, an unlocking rotary disc 2-1, a locking pin 2-2, a locking pin pull rod 2-3, a lock bolt limit card 2-4, an emergency unlocking handle 2-5, an external unlocking push rod 2-6, an external unlocking connecting rod 2-7, a door lock mounting seat 2-8, a locking extension spring 2-9 and a positioning pin 2-10,

An unlocking device 3, an unlocking push rod 3-1, an unlocking protective cover 3-2, a lockable pin shaft 3-3, a protective cover pin shaft hole 3-4,

A door frame 4 is arranged, a bolt hole 4-1,

A top hinged linkage 5, a winding disc assembly 5-1, a first driving gear 5-11, a second driving gear 5-12, an escape door mounting arm 5-2, a left escape door mounting arm 5-2a, a right escape door mounting arm 5-2b, a ratchet block linkage pin 5-3, a ratchet block 5-4, a mounting seat 5-5,

Escape ramp assembly 6, cable 6a, spool 6b, left safety belt 6-c1, right safety belt 6-c2,

A pedal frame assembly 6-1, a left pedal frame assembly 6-11, a left first support bar 6-11-1, a left second support bar 6-11-2, a left first cushioning device 6-11-3, a left pull bar 6-11-4,

A right pedal frame assembly 6-12, a right first support bar 6-12-1, a right second support bar 6-12-2, a right first cushioning device 6-12-3, a right pull bar 6-12-4,

Pedals 6-2, first pedal 6-21, second pedal 6-22, third pedal 6-23, fourth pedal 6-24,

Opening device 6-3, compression spring 6-31, support platform 6-32,

The pedal locking device 7, the pedal locking pin 7-1, the U-shaped limiting clamp 7-2, the U-shaped limiting clamp torsion spring 7-3, the unlocking spanner 7-4 and the spanner torsion spring 7-5.

Detailed Description

In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings. The description of the azimuth of the present invention is performed according to the azimuth shown in fig. 1, that is, the up-down-left-right direction shown in fig. 1 is the up-down-left-right direction of the description, one of which is the rear (that is, the interior of the car) in fig. 1, and the one of which is the front (that is, the door opening direction) in fig. 1.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

It should be understood that the terms "upper," "lower," "inner," "outer," and the like indicate orientations or positional relationships based on the positional relationships described in the drawings, and are merely used to facilitate describing the invention or simplify the description, and do not indicate a particular orientation that must be assumed.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1to 17, the escape apparatus of the subway locomotive of the present invention includes an escape door 1, a door lock device 2, an unlocking device 3, a mounting door frame 4, a top hinge linkage 5, an escape ramp assembly 6, and a step locking device 7.

Referring to fig. 1 to 17, a transparent window 1-1 is provided at an upper portion of the escape door 1. The top hinged linkage 5 is fixedly arranged on a door opening of the subway locomotive. The upper part of the escape door 1 is rotatably connected and arranged on a door opening of a subway locomotive through a top hinged linkage device 5. The lower part of the escape door 1 is provided with an illuminating lamp 1-2. The mounting door frame 4 is fixedly arranged in a door opening of the subway locomotive. The door lock device 2 is used for locking and fixedly connecting the lower part of the escape door 1 with the mounting door frame 4. The unlocking device 3 is used for controlling the door lock device 2, so that the escape door 1 can be separated from the mounting door frame 4 and turned upwards to be opened. The left side and the right side of the escape door 1 are both provided with gas springs, one ends of the gas springs are hinged on the escape door 1, the other ends of the gas springs are hinged on corresponding parts of the installation door frame 4, and the gas springs are used for enabling the escape door 1 to be kept in a turnover open state. One end of the escape ramp assembly 6 is hinged to the lower end of the mounting door frame 4, the other end of the escape ramp assembly 6 is provided with a guy cable 6a, and the other end of the guy cable 6a is fixedly arranged on a winding shaft 6 b.

Referring to fig. 1 to 3 and 6 to 9, the door lock device 2 includes a latch, an unlocking dial 2-1, a locking pin 2-2, a locking pin pull rod 2-3, a latch limit card 2-4, an emergency unlocking handle 2-5, an external unlocking push rod 2-6, an external unlocking link 2-7, and a door lock mount 2-8.

Referring to fig. 13, bolts are fixedly provided on both left and right sides of a lower portion of the installation door frame 4, and extend from bolt holes 4-1 provided in the installation door frame 4 to the inside of the installation door frame 4 (bolts are not shown in the drawing). The lock bolt is a cylinder shaft.

Referring to fig. 6 to 9, the unlocking dial 2-1 is rotatably provided on the middle of the door lock mount 2-8. The emergency unlocking handle 2-5 is fixedly arranged on the unlocking turntable 2-1, and the emergency unlocking handle 2-5 is pulled to enable the unlocking turntable 2-1 to rotate. The two locking pins 2-2 are respectively arranged on the left side and the right side of the door lock mounting seat 2-8 in a sliding way, and the two locking pins 2-2 are respectively arranged along the axis of the two locking pins in a sliding way along the left and the right directions. The two locking pin pull rods 2-3 are arranged, one locking pin pull rod 2-3 is used for connecting the locking pin 2-2 positioned on the left side and the unlocking turntable 2-1 in a transmission mode, the other locking pin pull rod 2-3 is used for connecting the locking pin 2-2 positioned on the right side and the unlocking turntable 2-1 in a transmission mode, and accordingly the unlocking turntable 2-1 is rotated, and the two locking pins 2-2 synchronously and reversely move. A locking tension spring 2-9 is arranged between the locking pin pull rod 2-3 and the door lock mounting seat 2-8, and the locking tension spring 2-9 is used for moving the locking pin pull rod 2-3 outwards, so that the locking pin 2-2 extends outwards. The two lock bolt limiting clamps 2-4 are respectively arranged on the left side and the right side of the door lock mounting seat 2-8 in a rotating way, and the two lock bolt limiting clamps 2-4 are respectively arranged on the left side and the right side of the door lock mounting seat 2-8 in a rotating way. The lock plunger limit card 2-4 comprises a U-shaped locking part and a limit part 2-41. The front part of the lock plunger limiting card 2-4 is provided with a corresponding locating pin 2-10. The lock plunger limiting cards 2-4 keep the U-shaped openings towards the rear upper side through corresponding torsion springs. When the door is closed, the lock bolt enters between the two ends of the U-shaped locking part of the lock bolt limiting clamp 2-4, the lock bolt limiting clamp 2-4 is driven to rotate backwards to enable the U-shaped opening of the U-shaped locking part to face upwards, then the locking pin 2-2 extends outwards to the position above the limiting part 2-41 of the lock bolt limiting clamp 2-4, and the lock bolt limiting clamp 2-4 cannot rotate forwards any more to be opened, so that a locking structure is formed with the lock bolt. The external unlocking push rod 2-6 is arranged on the left side of the door lock mounting seat 2-8 in a sliding way along the left and right direction by the axis of the external unlocking push rod, the external unlocking connecting rod 2-7 is in transmission connection between the external unlocking push rod 2-6 and the locking pin pull rod 2-3 positioned on the left side, and the locking pin pull rod 2-3 is driven to move by pushing the external unlocking push rod 2-6, so that the unlocking purpose can be achieved. The outer surface of the subway locomotive is provided with a corresponding spanner, and the spanner is connected with a corresponding ejector rod in a transmission way to push the external unlocking push rod 2-6 to move inwards, so that the aim of unlocking outside the vehicle is fulfilled.

Referring to fig. 1 to 3, 6 and 10, the unlocking device 3 includes an unlocking push rod 3-1 and an unlocking shield 3-2. The two ends of the unlocking push rod 3-1 are rotatably arranged on the escape door 1, the axis of the unlocking push rod 3-1 is mutually parallel to the rotation axis of the unlocking push rod, the unlocking push rod 3-1 is fixedly connected with the unlocking rotary table 2-1 of the door lock device 2 through a steel wire rope, so that when the unlocking push rod 3-1 is pushed upwards to rotate, the steel wire rope is driven to pull the unlocking rotary table 2-1 to rotate for unlocking, and the escape door 1 is upwards supported by a gas spring (not shown in the figure).

The left side and the right side of the unlocking protective cover 3-2 are rotatably arranged in corresponding protective cover pin shaft holes 3-4 on the escape door 1 through lockable pin shafts 3-3. The unlocking protective cover 3-2 covers the unlocking push rod 3-1 from above and in front, and is used for preventing the escape door 1 from being opened by mistakenly pushing the unlocking push rod 3-1. The rotary connection part (the part in the pin hole 3-4 of the protective cover) of the lockable pin 3-3 is provided with two planes which are parallel to each other in front and back, and the two planes are parallel to the axis of the lockable pin 3-3. The protective cover pin shaft hole 3-4 comprises a round hole at the upper part and a waist-shaped hole at the lower part, the upper part of the waist-shaped hole is communicated with the round hole, and the axis of the waist-shaped hole is arranged along the up-down direction. The width of the waist-shaped hole in the front-rear direction corresponds to the distance between the two planes of the lockable pin shaft 3-3. Thus, when the unlocking shield 3-2 is opened upward, the two planes of the lockable pin shaft 3-3 slide downward into the waist-shaped holes of the shield pin shaft holes 3-4 positioned at the lower part, and the unlocking shield 3-2 is kept in an opened state and cannot be closed downward. When the unlocking protective cover 3-2 needs to be closed, the unlocking protective cover 3-2 is lifted upwards, so that the lockable pin shaft 3-3 moves upwards into a round hole positioned at the upper part of the protective cover pin shaft hole 3-4, and then rotates downwards to be closed, and the upper part and the front part of the unlocking push rod 3-1 are covered.

Referring to fig. 1to 3, 5, 11 and 12, the top hinge linkage 5 includes a winding reel assembly 5-1, an escape door mounting arm 5-2, a ratchet block linkage pin 5-3, a ratchet block 5-4 and a mounting seat 5-5.

The reel assembly 5-1 includes a first drive gear 5-11 and a second drive gear 5-12. The first driving gear 5-11 is rotatably arranged on the left part of the mounting seat 5-5, a transmission connection square hole is arranged on the rotating shaft of the first driving gear 5-11, and the first driving gear is in transmission connection with the connection square hole through a corresponding wrench, so that the first driving gear 5-11 can be driven to rotate through the wrench. The second transmission gear 5-12 is rotatably arranged on the left part of the mounting seat 5-5 and meshed with the first driving gear 5-11.

The two escape door mounting arms 5-2 are respectively called a left escape door mounting arm 5-2a and a right escape door mounting arm 5-2b according to the difference of the left and right positions of the two escape door mounting arms 5-2. The two escape door mounting arms 5-2 are coaxially and rotatably arranged on the mounting seat 5-5. The escape door 1 is fixedly connected to two escape door mounting arms 5-2. The wire reel 6b is rotatably provided on the right portion of the mount 5-5. The second transmission gear 5-12 is in driving connection with the reel 6b via a corresponding driving shaft.

The upper part of the ratchet block 5-4 is rotatably connected with the left part of the mounting seat 5-5, and the ratchet at the lower part thereof is meshed with the first driving gear 5-11 under the action of the corresponding torsion spring, so that the first driving gear 5-11 can only rotate unidirectionally. The right part of the ratchet block 5-4 is provided with a transmission baffle plate 5-41.

The ratchet block linkage pin 5-3 is slidably arranged on the left escape door mounting arm 5-2a along the left-right direction, and is driven by a corresponding compression spring to extend leftwards below the transmission baffle plate 5-41 of the ratchet block 5-4, so that when the escape door 1 is opened upwards, the ratchet block linkage pin 5-3 drives the ratchet block 5-4 to be separated from the first driving gear 5-11 upwards, and the first driving gear 5-11 can rotate reversely.

Referring to fig. 1-3 and 14-16, escape ramp assembly 6 includes a pedal frame assembly 6-1, a pedal 6-2, and an opening device 6-3. The opening devices 6-3 are provided with two groups, and the two groups of opening devices 6-3 have the same structure and comprise compression springs 6-31 and supporting platforms 6-32. The two sets of opening devices 6-3 are fixedly connected to the left and right sides of the lower portion of the mounting doorframe 4 by their respective compression springs 6-31, respectively. The supporting platform 6-31 is fixedly arranged at the upper end of the compression spring 6-31, and the compression spring 6-31 is vertically arranged along the up-down direction.

The pedal frame assemblies 6-1 have two groups, and the two groups of pedal frame assemblies 6-1 are referred to as left pedal frame assemblies 6-11 and right pedal frame assemblies 6-12, respectively, depending on the left and right positions they are located in.

The left pedal frame assembly 6-11 includes a left first support bar 6-11-1, a left second support bar 6-11-2, a left first cushioning device 6-11-3, and a left pull bar 6-11-4.

One end of the left first supporting rod 6-11-1 is fixedly connected to the left side of the lower portion of the mounting door frame 4 in a hinged mode, the other end of the left first supporting rod is fixedly connected with the left second supporting rod 6-11-2 in a hinged mode, the left first supporting rod 6-11-1 and the left second supporting rod 6-11-2 are unfolded to form 180 degrees, and the left second supporting rod 6-11-2 is turned upwards to be unfolded. The left safety protection belt 6-c1 is provided on the left and left first support bars 6-11-1 and the left second support bars 6-11-2 of the installation door frame 4.

The other end of the left second supporting rod 6-11-2 is fixedly connected with a guy rope 6 a. The left first buffer device 6-11-3 adopts a stretching cylinder, one end of the stretching cylinder is hinged on the left side of the mounting door frame 4, and the other end of the stretching cylinder is hinged on the left first support rod 6-11-1. The rear end of the left first supporting rod 6-11-1 is provided with a guide roller 6-11-11, and the rotation axis of the guide roller 6-11-11 is parallel to the hinging axis of the left first supporting rod 6-11-1 and the mounting door frame 4. When the left first support rod 6-11-1 and the left second support rod 6-11-2 are folded and retracted, the guide roller 6-11-11 at the rear end of the left first support rod 6-11-1 is pressed down on the support platform 6-32 of the opening device 6-3 located on the left from above, so that the compression spring 6-31 is in a compressed state. The left pull rod 6-11-4 is composed of two connecting rods which are connected together in a hinged mode, one end of the left pull rod 6-11-4 is connected to the mounting door frame 4 in a hinged mode, and the other end of the left pull rod is connected to the hinged position of the left first supporting rod 6-11-1 and the left second supporting rod 6-11-2 in a hinged mode.

The right pedal frame assembly 6-12 includes a right first support bar 6-12-1, a right second support bar 6-12-2, a right first cushioning device 6-12-3, and a right pull bar 6-12-4.

One end of the right first supporting rod 6-12-1 is fixedly connected to the right side of the lower portion of the installation door frame 4 in a hinged mode, the other end of the right first supporting rod is fixedly connected with the right second supporting rod 6-12-2 in a hinged mode, the right first supporting rod 6-12-1 and the right second supporting rod 6-12-2 are unfolded to form 180 degrees, and the right second supporting rod 6-12-2 is turned upwards to be unfolded. The right safety protection belt 6-c2 is disposed on the right and right first support bars 6-12-1 and the right second support bar 6-12-2 of the installation door frame 4.

The right first buffer device 6-12-3 adopts a stretching cylinder, one end of the stretching cylinder is hinged on the right side of the mounting door frame 4, and the other end of the stretching cylinder is hinged on the right first support rod 6-12-1. The rear end of the right first supporting rod 6-12-1 is provided with a guide roller 6-12-11, and the rotation axis of the guide roller 6-12-11 is parallel to the hinging axis of the right first supporting rod 6-12-1 and the mounting door frame 4. When the right first support rod 6-12-1 and the right second support rod 6-12-2 are folded and retracted, the guide roller 6-12-11 at the rear end of the right first support rod 6-12-1 is pressed down on the support platform 6-32 of the opening device 6-3 located on the right from above, so that the compression spring 6-31 is in a compressed state. The right pull rod 6-12-4 is composed of two connecting rods which are connected together in a hinged mode, one end of the right pull rod 6-12-4 is connected to the mounting door frame 4 in a hinged mode, and the other end of the right pull rod is connected to the hinged position of the right first supporting rod 6-12-1 and the right second supporting rod 6-12-2 in a hinged mode.

The pedals 6-2 have 4, and the 4 pedals 6-2 are called a first pedal 6-21, a second pedal 6-22, a third pedal 6-23 and a fourth pedal 6-24 from front to back.

The first pedal 6-21 is fixedly disposed between the front portion of the left side second support bar 6-11-2 and the front portion of the right side second support bar 6-12-2 of the pedal frame assembly 6-1.

The front portion of the second pedal 6-22 is rotatably disposed between the left side second support bar 6-11-2 and the right side second support bar 6-12-2, behind the first pedal 6-21. The rear part of the second pedal 6-22 is hinged with the third pedal 6-23, and the rear part of the third pedal 6-23 is rotatably arranged between the left side first supporting rod 6-11-1 and the right side first supporting rod 6-12-1 and positioned in front of the fourth pedal 6-24. A stretching cylinder is respectively arranged between the left and right sides of the lower rear part of the second pedal 6-22 and the left and right sides of the lower front part of the third pedal 6-23, and the stretching cylinder plays a role in buffering and stretching when the second pedal 6-22 and the third pedal 6-23 are unfolded.

The fourth pedal 6-24 is fixedly disposed between the rear portion of the left side first support rod 6-11-1 and the rear portion of the right side first support rod 6-12-1 of the pedal frame assembly 6-1.

Referring to fig. 3, 16 and 17, the pedal locking device 7 includes a pedal locking pin 7-1, a U-shaped stopper 7-2, a U-shaped stopper torsion spring 7-3, an unlocking spanner 7-4 and a spanner torsion spring 7-5. The pedal locking pin 7-1 is fixedly provided on the inside rear portion of the right second support bar 6-12-2 of the pedal frame 6-1, protruding to the inside of the frame below the second pedal 6-22, with its axis being disposed parallel to the rotational axis when the pedal is deployed. The U-shaped limit clamp 7-2 is rotatably arranged on the second pedal 6-22 by one end of the U-shaped connecting part, and the U-shaped limit clamp torsion spring 7-3 is used for keeping the opening of the U-shaped limit clamp 7-2 in a state parallel to the right second support rod 6-12-2. The lower side of the U-shaped connecting part of the U-shaped limiting clamp 7-2 is provided with a bayonet 7-21. The unlocking spanner 7-4 is rotatably arranged on the second pedal 6-22, and the lower part of the unlocking spanner 7-4 extends downwards out of the second pedal 6-22. The upper part of the unlocking spanner 7-4 is provided with a limit lug 7-41, the limit lug 7-41 stretches into a bayonet 7-21 of the U-shaped limit clamp 7-2 and is used for preventing an opening of the U-shaped limit clamp 7-2 from being opened downwards, and the spanner torsion spring 7-5 is used for enabling the limit lug 7-41 of the unlocking spanner 7-4 to be kept in the bayonet 7-21. When the pedal locking device is used, when the second pedal 6-22 is unfolded, after the U-shaped limiting clamp 7-2 downwards touches the pedal locking pin 7-1 on the second pedal 6-22, the opening part of the U-shaped limiting clamp 7-2 moves upwards, and when the pedal locking pin 7-1 moves upwards to the opening part of the U-shaped limiting clamp 7-2, the opening part of the U-shaped limiting clamp 7-2 is reset downwards under the action of the U-shaped limiting clamp torsion spring 7-3, so that the pedal locking pin 7-1 is limited and fixed in the U-shaped limiting clamp 7-2. When unlocking is needed, the unlocking spanner 7-4 is pulled, the limiting protruding blocks 7-41 of the unlocking spanner 7-4 are separated from the bayonets 7-21 of the U-shaped limiting clamps 7-2, so that when the second pedal 6-22 is upwards retracted, the pedal locking pin 7-1 drives the opening of the U-shaped limiting clamps 7-2 to downwards open, and when the pedal locking pin 7-1 is separated from the U-shaped limiting clamps 7-2, the U-shaped limiting clamps 7-2 are upwards reset under the action of the U-shaped limiting clamp torsion springs 7-3, and then the unlocking spanner 7-4 is released.

The escape device of the subway locomotive is used as follows: the unlocking protection cover 3-2 is opened upwards, two planes of the lockable pin shaft 3-3 slide downwards into the waist-shaped holes of the protection cover pin shaft holes 3-4 positioned at the lower part, and the unlocking protection cover 3-2 is kept in an opened state and cannot be closed downwards. Then when the unlocking push rod 3-1 is pushed upwards to rotate, the steel wire rope is driven to pull the unlocking turntable 2-1 to rotate, the locking pin 2-2 is pulled to move inwards through the locking pin pull rod 2-3, the escape door 1 is pushed outwards after being separated from the upper part of the limiting part 2-41 of the lock bolt limiting clamp 2-4, the lock bolt limiting clamp 2-4 rotates backwards under the action of the torsion spring and the action of the lock bolt, so that the lock bolt can be separated from the lock bolt limiting clamp 2-4, and then the escape door 1 is upwards supported by the air spring. While the escape door 1 is supported, the ratchet block linkage pin 5-3 drives the ratchet block 5-4 to be separated from the first driving gear 5-11 upwards, and the first driving gear 5-11 can rotate freely, so that the pedal frame assembly 6-1 is jacked up by the opening device 6-3, the left first support rod 6-11-1 and the right first support rod 6-12-1 fall forwards, the left second support rod 6-11-2 and the right second support rod 6-12-2 are turned over forwards from the upper direction and opened, and the second pedal 6-22 and the third pedal 6-23 are locked in the unfolded state by the pedal locking device 7 after being unfolded, so that an escape ramp is formed. After the escape door is used up, when the escape door is required to be retracted, the ratchet block linkage pin 5-3 is pulled rightward to separate from the transmission baffle plate 5-41 of the ratchet block 5-4, the ratchet block 5-4 and the first driving gear 5-11 form a ratchet mechanism, then the first driving gear 5-11 is rotated by corresponding tools, the second transmission gear 5-12 and the winding shaft 6b are driven to rotate, the winding shaft 6b winds the stay cable 6a on the winding shaft 6b, so that the pedal frame assembly 6-1 is pulled back by the stay cable 6a, and meanwhile, the pedal locking pin 7-1 is required to be unlocked, so that the second pedal 6-22 and the third pedal 6-23 are folded backwards. Finally, the escape door 1 is pulled back.

While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.

Claims

1. The utility model provides an escape device of subway locomotive, includes escape door, door lock device, unlocking device and installation door frame, and the fixed setting of installation door frame is in the door opening of subway locomotive, and door lock device is used for locking fixed connection with the escape door lower part and installation door frame, its characterized in that: the system also comprises a top hinged linkage and an escape ramp assembly;

The upper part of the escape door is provided with a transparent window; the top hinged linkage device is fixedly arranged on a door opening of the subway locomotive; the upper part of the escape door is rotationally connected and arranged on a door opening of the subway locomotive through a top hinged linkage; the unlocking device is used for controlling the door lock device to enable the escape door to be separated from the mounting door frame and turned upwards to be opened; the left side and the right side of the escape door are respectively provided with a gas spring, one end of each gas spring is hinged to the escape door, the other end of each gas spring is hinged to the corresponding part of the installation door frame, and each gas spring is used for keeping the escape door in a turnover opening state; the escape ramp assembly includes a pedal frame assembly and a pedal; the pedal frame component is hinged on the lower part of the mounting door frame; the pedal is arranged on the pedal frame assembly, and the escape ramp is formed after the pedal frame assembly is unfolded;

the door lock device comprises a lock plunger, an unlocking turntable, a locking pin pull rod, a lock plunger limiting clamp, a door lock mounting seat and an emergency unlocking handle;

The lock bolts are fixedly arranged on the left side and the right side of the lower part of the installation door frame and extend into the installation door frame from lock bolt holes on the installation door frame; the lock bolt is a cylinder shaft; the unlocking turntable is rotatably arranged in the middle of the door lock mounting seat; the two locking pins are respectively arranged on the left side and the right side of the door lock mounting seat in a sliding way, and are arranged along the left and the right directions along the axis of the two locking pins; the two locking pin pull rods are used for connecting the locking pin positioned on the left side and the unlocking turntable in a transmission manner, and the other locking pin pull rod is used for connecting the locking pin positioned on the right side and the unlocking turntable in a transmission manner, so that the unlocking turntable is rotated to enable the two locking pins to synchronously and reversely move; a locking tension spring is arranged between the locking pin pull rod and the door lock mounting seat and is used for moving the locking pin pull rod outwards so as to enable the locking pin to extend outwards; the two lock bolt limiting clamps are respectively rotatably arranged on the left side and the right side of the door lock mounting seat; the lock plunger limiting card comprises a U-shaped locking part and a limiting part; the front part of the lock plunger limiting clamp is provided with a corresponding locating pin; the lock plunger limiting card keeps the U-shaped opening to face upwards and backwards through the corresponding torsion spring; the emergency unlocking handle is fixedly arranged on the unlocking turntable, and the emergency unlocking handle is pulled to enable the unlocking turntable to rotate.

2. The escape device of a subway locomotive according to claim 1, wherein: the door lock device also comprises an external unlocking push rod and an external unlocking connecting rod; the external unlocking push rod is arranged on the left side of the door lock mounting seat in a sliding way along the left and right direction by the axis of the external unlocking push rod, the external unlocking connecting rod is in transmission connection between the external unlocking push rod and the locking pin pull rod positioned on the left side, and the locking pin pull rod is driven to move by pushing the external unlocking push rod, so that the purpose of unlocking can be achieved.

3. The escape device of a subway locomotive according to claim 1, wherein: the unlocking device comprises an unlocking push rod; the two ends of the unlocking push rod are rotatably arranged on the escape door, the axes of the unlocking push rod are mutually parallel to the rotation axes of the unlocking push rod, and the unlocking push rod is fixedly connected with an unlocking rotary table of the door lock device through a steel wire rope, so that when the unlocking push rod is pushed upwards to rotate, the steel wire rope is driven to pull the unlocking rotary table to rotate for unlocking.

4. An escape device for a subway locomotive according to claim 3 wherein: the unlocking device further comprises an unlocking protective cover; the left side and the right side of the unlocking protective cover are rotatably arranged in corresponding protective cover pin shaft holes on the escape door through lockable pin shafts; the unlocking protective cover covers the unlocking push rod from above and in front, and is used for preventing the escape door from being opened due to the fact that the unlocking push rod is pushed by mistake; the rotary connecting part of the lockable pin shaft is provided with two planes which are parallel to each other front and back, and the two planes are parallel to the axis of the lockable pin shaft; the pin shaft hole of the protective cover comprises a round hole at the upper part and a waist-shaped hole at the lower part, the upper part of the waist-shaped hole is communicated with the round hole, and the axis of the waist-shaped hole is arranged along the up-down direction; the width of the waist-shaped hole in the front-rear direction corresponds to the distance between the two planes of the lockable pin shaft.

5. The escape device of a subway locomotive according to claim 1, wherein: the outer end of the escape ramp assembly is provided with a stay rope for retracting the escape ramp assembly;

The top hinged linkage device comprises a winding roll assembly, an escape door mounting arm, a ratchet block linkage pin, a ratchet block and a mounting seat; the winding roll assembly comprises a first driving gear and a second transmission gear; the first driving gear is rotatably arranged on the left part of the mounting seat, and a transmission connection square hole is formed in the rotating shaft of the first driving gear; the second transmission gear is rotatably arranged on the left part of the mounting seat and meshed with the first driving gear;

The two escape door mounting arms are respectively called a left escape door mounting arm and a right escape door mounting arm according to the difference of the left and right positions of the two escape door mounting arms; the two escape door mounting arms are coaxially and rotatably arranged on the mounting seat; the escape door is fixedly connected to the two escape door mounting arms; the wire reel is rotatably arranged on the right part of the mounting seat; the second transmission gear is in transmission connection with the wire winding shaft through a corresponding transmission shaft, and one end of the inhaul cable is fixedly arranged on the wire winding shaft;

the upper part of the ratchet block is rotationally connected with the left part of the mounting seat, and the ratchet at the lower part of the ratchet block is meshed with the first driving gear under the action of the corresponding torsion spring and is used for enabling the first driving gear to rotate in one direction only; the right part of the ratchet block is provided with a transmission baffle plate;

6. The escape device of a subway locomotive according to claim 1, wherein: the pedal frame assemblies are respectively called a left pedal frame assembly and a right pedal frame assembly according to the difference of left and right positions of the pedal frame assemblies;

The left pedal frame assembly comprises a left first supporting rod, a left second supporting rod, a left first buffer device and a left pull rod; one end of the left first support rod is fixedly connected to the left side of the lower part of the mounting door frame in a hinged mode, the other end of the left first support rod is fixedly connected with the left second support rod in a hinged mode, the left first support rod and the left second support rod are unfolded to form 180 degrees, and the left second support rod is turned upwards to be opened; the left first buffer device adopts a stretching cylinder, one end of the stretching cylinder is hinged on the left side of the mounting door frame, and the other end of the stretching cylinder is hinged on the left first support rod; the left pull rod consists of two connecting rods which are connected together in a hinged manner, one end of the left pull rod is connected to the mounting door frame in a hinged manner, and the other end of the left pull rod is connected to the hinged position of the left first support rod and the left second support rod in a hinged manner;

the right pedal frame assembly comprises a right first supporting rod, a right second supporting rod, a right first buffer device and a right pull rod;

One end of the right first support rod is fixedly connected to the right side of the lower part of the mounting door frame in a hinged mode, the other end of the right first support rod is fixedly connected with the right second support rod in a hinged mode, the right first support rod and the right second support rod are unfolded to form 180 degrees, and the right second support rod is turned upwards to be opened; the right first buffer device adopts a stretching cylinder, one end of the stretching cylinder is hinged on the right side of the mounting door frame, and the other end of the stretching cylinder is hinged on the right first support rod; the right pull rod consists of two connecting rods which are connected together in a hinged manner, one end of the right pull rod is connected to the mounting door frame in a hinged manner, and the other end of the right pull rod is connected to the hinged position of the right first support rod and the right second support rod in a hinged manner;

The number of the pedals is 4, and the 4 pedals are called a first pedal, a second pedal, a third pedal and a fourth pedal from front to back;

the first pedal is fixedly arranged between the front part of the left second supporting rod and the front part of the right second supporting rod of the pedal frame assembly;

The front part of the second pedal is rotatably arranged between the left second supporting rod and the right second supporting rod and is positioned behind the first pedal; the rear part of the second pedal is hinged with a third pedal, and the rear part of the third pedal is rotatably arranged between the left first support rod and the right first support rod and is positioned in front of the fourth pedal; a stretching cylinder is arranged between the left side and the right side of the lower rear part of the second pedal and the left side and the right side of the lower front part of the third pedal respectively, and the second pedal and the third pedal play a role in buffering and stretching when being unfolded;

7. The escape apparatus of a subway locomotive according to claim 6, wherein: the escape ramp assembly also comprises two groups of opening devices, wherein the two groups of opening devices have the same structure and both comprise compression springs and supporting platforms; the two groups of opening devices are respectively and fixedly connected on the left side and the right side of the lower part of the mounting door frame by respective compression springs; the supporting platform is fixedly arranged at the upper end of the compression spring, and the compression spring is vertically arranged along the up-down direction; the rear end of the left first support rod is provided with a guide roller, and the rotation axis of the guide roller is parallel to the hinge axis of the left first support rod and the hinge axis of the mounting door frame; when the left first support rod and the left second support rod are folded and retracted, the guide roller at the rear end of the left first support rod is pressed down on the support platform of the opening device positioned at the left side from the upper direction, so that the compression spring is in a compression state;

The rear end of the right first support rod is provided with a guide roller, and the rotation axis of the guide roller is parallel to the hinging axis of the right first support rod and the mounting door frame; when the right first support rod and the right second support rod are folded and retracted, the guide roller at the rear end of the right first support rod is pressed down on the support platform of the opening device positioned on the right from the upper direction, so that the compression spring is in a compression state.

8. The escape device of a subway locomotive according to claim 6 or 7, wherein: the pedal locking device is also included; the pedal locking device comprises a pedal locking pin, a U-shaped limiting clamp torsion spring, an unlocking spanner and a spanner torsion spring; the pedal locking pin is fixedly arranged on the rear part of the inner side of the second supporting rod on the right side of the pedal frame, extends out to the lower part of the second pedal towards the inside of the frame, and the axis of the pedal locking pin is parallel to the rotation axis of the pedal when the pedal is unfolded; the U-shaped limiting clamp is rotatably arranged on the second pedal through one end of a U-shaped connecting part of the U-shaped limiting clamp, and a U-shaped limiting clamp torsion spring is used for enabling an opening of the U-shaped limiting clamp to be kept in a state parallel to the right second support rod; the lower side of the U-shaped connecting part of the U-shaped limiting card is provided with a bayonet; the unlocking spanner is rotatably arranged on the second pedal, and the lower part of the unlocking spanner downwards extends out of the second pedal; the upper portion of unblock spanner is equipped with spacing lug, and spacing lug stretches into in the bayonet socket of U-shaped spacing card for prevent the opening of U-shaped spacing card to open downwards, the spanner torsional spring is arranged in making the spacing lug of unblock spanner keep in the bayonet socket.