Rail train evacuation ramp release and recovery device

Abstract

The present invention discloses a rail train evacuation ramp release and recovery device, comprising a reducer, and left and right recovery disks provided at both ends of the reducer for winding a drawstring, left and right half-axles connected to the left and right recovery disks are respectively provided at the left and right ends of the reducer, the output end of the reducer is connected to the left half-axle, and the left and right half-axles are transmitted through a transition shaft. When a power device drives the reducer to rotate, deceleration and torque increase, the power output by the reducer is directly transmitted to the left recovery disk through the left half-axle on the one hand, and transferred to the right half-axle through the transition shaft on the other hand, and then transmitted to the right recovery disk for recovering the drawstring. When released, the left and right recovery disks rotate synchronously through the transition shaft, so that the left and right recovery disks of the drawstring can move synchronously but are not connected to the same axis. The reducer can be installed on the same axis as the recovery disk, which reduces the volume and facilitates the installation of the overall recovery device.

Description

Technical Field

[0001] The invention relates to a rail transit train accessory, in particular to a rail train evacuation ramp releasing and recovering device. Background Art

[0002] Emergency escape ramps are often recovered using a recovery device. For example, the invention patent application with publication number CN 108454643 A discloses a deceleration recovery device for emergency evacuation equipment of autonomous subway vehicles. When the emergency evacuation ramp needs to be recovered, it is manually recovered to avoid the impact of power outages. This solution only considers the situation when the emergency evacuation ramp is recovered, and does not consider the situation when the emergency evacuation channel is automatically released. The invention patent application with publication number CN 110329291 A discloses an emergency escape ramp for rail transit vehicles, which is provided with a ratchet and pawl structure. The driving gear is provided on one side of the ratchet. The ratchet can be connected or disconnected with the driving gear under the drive of the fork mechanism. When the ratchet is connected to the driving gear, it can drive the driving gear to rotate to control the recovery of the emergency evacuation ramp. When the ratchet is disengaged from the driving gear, the driving gear rotates freely to release the ramp. This device improves the safety of the ramp during release and recovery, but the push device and the recovery disk are installed separately, which is not conducive to installation and debugging. The operation of the ramp release and recovery is not simple enough and can be further optimized. Summary of the Invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a rail train evacuation ramp release and recovery device that is easy to install and has a reduced size.

[0004] Technical solution: The present invention relates to a rail train evacuation ramp release and recovery device, comprising a reducer, and left and right recovery disks provided at both ends of the reducer for winding the drawstring, characterized in that left and right half-axes connected to the left and right recovery disks are provided at the left and right ends of the reducer, respectively, and the output end of the reducer is connected to the left half-axle, and the left and right half-axles are transmitted through a transition shaft. When the power unit drives the reducer to rotate, deceleration and torque increase, the power output by the reducer is directly transmitted to the left recovery disk through the left half-axle on the one hand, and is transferred to the right half-axle through the transition shaft on the other hand, and then to the right recovery disk for recovering the drawstring. When released, the left and right recovery disks rotate synchronously through the transition shaft, so that the left and right drawstrings can be released at the same time. The left and right recovery disks move synchronously but are not connected to the same axis. The reducer can be installed on the same axis as the recovery disk, which reduces the volume and facilitates the installation of the overall recovery device.

[0005] Preferably, the left and right half shafts are parallel to the transition shaft, the middle of the left and right half shafts are respectively sleeved with a first gear, and both ends of the transition shaft are sleeved with a second gear meshing with the first gear. The left and right half shafts rotate synchronously through the first gear, the second gear and the transition shaft, and the gear meshing transmission ensures transmission stability.

[0006] Preferably, a damping drum assembly is provided on the left half shaft, and the damping drum is used to adjust the resistance, slow down the rotation speed of the recovery drum when releasing the recovery drum, and make the release of the pull belt more stable.

[0007] Preferably, the left and right half shafts are respectively provided with supports for supporting the transition shaft.

[0008] The input end of the reducer has no torque-increasing effect, and there is a margin to increase the one-way recovery device to improve recovery safety.

[0009] Preferably, the input end of the reducer is connected to a first ratchet and a first pawl for one-way recovery of the drawstring, and a second ratchet and a second pawl for preventing excessive recovery of the drawstring. The first ratchet and the second ratchet are coaxially connected, and the first ratchet is connected to the input end of the reducer. The first ratchet does not pass through the deceleration and torque-increasing effect of the output end of the reducer.

[0010] The locking device for a reducer used in the present invention includes an adapter, internally provided with a transmission assembly for connecting to the reducer input end and a deflection assembly for changing the direction of the reducer's power. The transmission assembly's end extending from the adapter is connected to a first ratchet, and the adapter's outer wall is rotatably connected to a first pawl. The deflection assembly's end extending from the adapter is provided with a connector that drives the front end of the first pawl into the first ratchet's tooth groove. The deflection assembly's end extending from the adapter docks with the output shaft of the power unit. During docking, the power unit output shaft drives the connector toward the adapter, causing the connector to transmit power, completing assembly of the locking device.

[0011] Preferably, the connecting member is a connecting plate, which slides axially along the deflection assembly to drive the front end of the first pawl into the first ratchet tooth groove.

[0012] Preferably, a sleeve for connecting to a power device is provided at the distal end of the deflection assembly, and the sleeve pushes the connecting piece to slide axially along the deflection assembly, and the sleeve is detachably connected to the deflection assembly.

[0013] Preferably, a ball is provided at the end of the deflection shaft, and a side hole is provided on the inner wall of the sleeve, and the deflection shaft and the sleeve are detachably connected via the ball and the side hole.

[0014] Preferably, the protruding end of the deflection assembly is connected to the sleeve via a connecting shaft having a diameter smaller than that of the deflection assembly, and the connecting piece is sleeved on the connecting shaft, forming a stepped structure between the connecting shaft and the deflection assembly / worm to limit excessive sliding of the connecting piece.

[0015] Preferably, the connecting piece is an elastic piece, and the angle of the connecting end of the connecting piece and the first pawl jumping up and down does not exceed 10°. The connecting piece jumps within a suitable range to ensure the service life.

[0016] Preferably, in order to ensure that the first pawl smoothly leaves the first ratchet when the sleeve is disengaged, a torsion spring is provided between the adapter and the first pawl to push the front end of the first pawl out of the tooth groove of the first ratchet.

[0017] Preferably, the transmission assembly is a worm gear, and the deflection assembly is a worm.

[0018] Preferably, the end of the adapter is connected to a second ratchet in the opposite direction of the first ratchet, and the outer side wall of the adapter is rotatably connected to a second pawl whose front end extends into the tooth groove of the second ratchet. The second ratchet and the second pawl are used to prevent the reducer from over-rotating.

[0019] On this basis, the present invention provides a highly safe rail train evacuation ramp release and recovery device, comprising the aforementioned rail train evacuation ramp release and recovery device and a locking device for a reducer, wherein the reducer input end is connected to an adapter for deflecting the direction of the power input to the reducer, the reducer is connected to a first ratchet and a second ratchet through the adapter, the first pawl and the second pawl are respectively rotatably connected to the side walls of the adapter, the first pawl and the second pawl are arranged up and down, the front end of the second pawl is stuck in the second pawl due to its own weight, and the front end of the first pawl is separated from the first ratchet due to its own weight. During the safe movement of the rail train, the front end of the first pawl is separated from the first ratchet tooth groove due to its own weight. Once an unexpected situation occurs, the emergency door is opened and the pull strap is smoothly released.

[0020] Preferably, a torsion spring is provided between the first pawl and the adapter to disengage the front end of the first pawl from the first ratchet.

[0021] Preferably, one end of the worm gear of the adapter is connected to the input end of the reducer and the other end is connected to the first ratchet or the second ratchet. The worm of the reducer is connected to the power device, which is a hand crank or an electric screwdriver.

[0022] Preferably, the rear end of the second pawl is connected to the emergency door of the rail train, and when the emergency door is opened, the front end of the second pawl is driven to leave the second ratchet tooth groove. During the safe travel of the rail train, its emergency door is in a closed state, which does not drive the second pawl to rotate. The front end of the second pawl extends into the second ratchet tooth groove due to its own gravity, thereby preventing accidental operation of excessive retraction of the drawstring. When an emergency occurs, the train emergency door rotates open, driving the second pawl to rotate and disengage. After use, the recovery disk can smoothly retract the drawstring, thereby retracting the evacuation ramp.

[0023] Preferably, one end of the connecting piece is sleeved on the worm of the adapter, and the other end is connected to the rear end of the first pawl. The connecting piece slides along the axial direction of the worm, driving the front end of the first pawl to enter the tooth groove of the first ratchet. When the worm of the adapter is connected to the power device, the connecting piece is pushed to slide a certain distance along the axial direction of the worm, and the connecting piece drives the first pawl to rotate, and its front end is engaged with the first ratchet, so that the first ratchet can only rotate in one direction, thereby ensuring that the recovery disk can only rotate in one direction. When the power device is disconnected, the first pawl is driven to rotate and disengage from the first ratchet due to its own gravity or by the torsion spring, and the left and right recovery disks can be released without obstruction.

[0024] Beneficial effects: Compared with the existing technology, the present invention has the following significant advantages: 1. Compact structure, reduced volume, and large load-bearing capacity; 2. Simple recovery and release operations, smooth transmission, and simple debugging and maintenance; 3. Little impact on the size of the existing door system and can be used in a variety of working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention from the first perspective.

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second viewing angle.

[0027] Figure 3 It is a schematic diagram of the overall structure of the present invention from the third viewing angle.

[0028] Figure 4 for Figure 1 A magnified view of some of the structures in .

[0029] Figure 5 It is a cross-sectional view of the propulsion and power device structure of the present invention. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example 1: As shown in the figure, the rail train evacuation ramp release and recovery device includes an end bearing seat 1, a left recovery disk 2, a damping drum assembly 3, a first gear 5, a second gear 4, a right half output shaft 6, a mounting support 7, a right recovery disk 8, a reducer 9, an adapter 10, a manual lever 11, a transition shaft 12, a reducer mounting seat 13, a first ratchet 14, a second ratchet 15, a first pawl 16, a left half output shaft 17, a reducer coupling sleeve 18, and a second pawl 19. The reducer 9 and the mounting support 7 are arranged in the middle. The left output end of the reducer 9 is connected to the left half output shaft 17 through a coupling sleeve 18. The left half output shaft 17 is installed with a left recovery disk 2 and an end bearing seat 1. The middle part is installed with a damping drum assembly 3. The right side of the reducer 9 has an adapter 10 and a right half output shaft 6. The right half output shaft 6 and the left half output shaft 17 are on the same axis. The right half output shaft 6 is installed with a right recovery disk 8 and an end bearing seat 1 at the end of the right half output shaft 6. There is no direct connection between the right half output shaft 6 and the reducer 9.

[0032] The left and right output shafts 17 and 6 are each fixedly connected to the first gear 5 and sleeved onto a mounting bracket 7. The rear of the mounting bracket 7 is used to support the left and right output shafts 17 and 6 together with the end shaft support 1. The front of the mounting bracket 7 is rotatably connected to a transition shaft 12. Both ends of the transition shaft 12 are connected to the second gear 4 that meshes with the first gear 5. When the left and right recovery discs 2 and 8 move, they can achieve synchronous operation through the transition shaft 12.

[0033] When releasing the drawstring connected to the evacuation ramp, due to the transmission of the first gear 5, the second gear 4, and the transition shaft 12, the left and right recovery disks 2 and 8 on both sides of the device rotate synchronously and rapidly clockwise, and the damping drum assembly 3 adjusts the resistance to slow down the rotation speed of the recovery disk 2; when recovering the drawstring connected to the evacuation ramp, the input end of the reducer is manually rotated or connected to an electric screwdriver as a power device. Taking manual operation as an example, the manually rotated power is input to the input end of the reducer 9. After the reducer 9 reduces the speed and increases the torque, the amplified power is transmitted to the left recovery disk 2 through the left output shaft 17. At the same time, the torque is synchronously transmitted to the right recovery disk 8 through two groups of gears consisting of the first gear 5 and the second gear 4, the transition shaft 12, and the right half output shaft 6, thereby completing the drawstring recovery.

[0034] The rail train evacuation ramp release and recovery device of the present invention is installed on the top of the train and has a certain height. In order to facilitate power input, the input end of the reducer 9 (i.e., between the reducer and the right half output shaft 6) is installed with an adapter 10 for changing the power input direction of the reducer 9. The power device inputs power to the reducer through the adapter 10. The adapter 10 is internally equipped with a transmission assembly connected to the input end of the reducer 9, and a deflection assembly for changing the power direction. The transmission assembly and the deflection assembly constitute a transmission group, which can be a worm gear assembly or a bevel gear group. Taking the worm gear as an example, the transmission assembly is a worm gear (not shown) and the deflection assembly is a worm gear 102. When power is manually input, the manual rod 11 is connected to the worm gear of the adapter 10, and the manual rod 11 is rotated, and the worm gear input end of the converter 10 inputs the power of the manual rod 11 into the reducer 9 through the worm gear.

[0035] Example 2: The drawstring recovery and release device of this example is the same as that in Example 1, except that the input end of the reducer 9 is directly or through an adapter 10 connected to a first locking device and a second locking device to form an entire safe release and recovery structure. The first locking device is used to ensure the safety of the recovery process and prevent the recovery disk from releasing the drawstring during the recovery process. The second locking device is used to prevent the drawstring from being over-recovered.

[0036] The first and second locking devices can be conventional ratchet and pawl structures, or other structures capable of unidirectional motion. Taking the ratchet and pawl structure as an example, the first locking device includes a first ratchet 14 and a first pawl 16. The input end of the reducer 9 is connected directly or via an adapter 10 to the first ratchet 14. The end face of the input end of the reducer 9 or the adapter 10 is rotatably connected to the first pawl 16 near the side wall of the right half output shaft 6. When the front end of the first pawl 16 extends into the tooth groove of the first ratchet 14, the reducer 9 can only rotate in one direction to retract the drawstring. The front end of the first pawl 16 can fall into the tooth groove of the first ratchet 14 by its own gravity, or it can be pushed into this year by an external force. In order to make the drawstring release smoothly, in this embodiment, the front end of the first pawl 16 extends into the first ratchet 14 under the action of an external force, and a pushing device is provided on the reducer 9 or the adapter 10 to push the first pawl 16 into the first ratchet 14. In order to facilitate manual operation, the pushing device is provided at the bottom of the reducer 9 or the adapter 10. The pushing device can be electrically driven or manually driven, and can be a sliding pushing device, such as a slider, or a rotating pushing device, such as a cam. In order to facilitate the automatic release of the drawstring, a torsion spring 20 is provided between the reducer 9 or the adapter 10 and the first pawl 16. When the torsion spring 20 is not deformed, the front end of the first pawl 14 disengages from the first ratchet 16.

[0037] The second locking device includes a second ratchet 15 and a second pawl 19. The second ratchet 15 is connected to the input end of the reducer 9 or the end of the worm gear shaft of the adapter 10 near the right half output shaft 6, and is coaxially connected to the first ratchet 14. The end face of the input end of the reducer 9 or the side wall of the adapter 10 near the right half output shaft 6 is rotatably connected to the second pawl 19. The ratchet teeth of the first and second ratchet 14 and 15 are in opposite directions. The rotating axes of the first and second pawls 16 and 19 are arranged in a vertically opposed direction (the front ends of the first and second pawls 16 and 19 are close to each other). The front end of the second pawl 19 extends into the tooth groove of the second ratchet 15 due to its own weight or external force. To avoid affecting the retraction of the pull belt, the second pawl 19 is driven into the second ratchet 15 by external force. To reduce additional operations, the rear end of the second pawl 19 (the end away from the second ratchet) is connected to a connecting rope, and the rear end of the second pawl 19 is connected to the emergency door of the railway train via the connecting rope.

[0038] When the drawstring connected to the evacuation ramp is released, the first pawl 16 disengages from the first ratchet 14 due to its own weight or the torsion spring 20, and the left and right recovery discs 2 and 8 can rotate backward synchronously, releasing the drawstring. Since the emergency door must be opened first to release the emergency ramp, the rotation of the emergency door drives the front end of the second pawl 19 away from the second ratchet 15, releasing the locked state of the second locking device, and the evacuation ramp can be recovered after use. During recovery, the pushing device drives the front end of the first pawl 16 to extend into the first ratchet 14, so that the first ratchet 14 can only rotate forward in one direction, and the worm gear of the reducer 9 or the adapter 10 can only rotate forward in one direction. The power is directly or through the manual lever 11 and the adapter 10. The reducer 9 reduces the speed and increases the torque. The left output shaft 17 is transmitted to the left recovery disk 2, the two sets of gear groups consisting of the first gear 4 and the second gear 5, the transition shaft 12, the right half output shaft 6, are synchronized to the right recovery disk 8 to complete the drawstring recovery. After the emergency door is closed, the second pawl 19 falls back into the second ratchet 15, and the worm gear of the adapter 10 can no longer rotate forward in one direction and cannot continue to recover. After the recovery is completed, the pushing device ends the pushing state, and the front end of the first pawl 16 leaves the first ratchet 14. When the emergency door is opened, the drawstring can be released smoothly and automatically.

[0039] Example 3: The drawstring recovery and release device of this embodiment is the same as that of Example 2, except that the driving device for driving the first pawl 16 to rotate is an elastic connecting piece 21. The elastic connecting piece 21 can be a metal sheet that deforms and quickly returns to its original shape, or it can be made of other materials.

[0040] One end of the connecting piece 21 is sleeved on the worm of the adapter 10, and the other end is connected to the rear end of the first pawl 16. In order to make the connecting piece slide within a suitable distance, the connecting piece is sleeved on the connecting shaft with a diameter smaller than the worm 102, and a step structure is formed between the connecting shaft and the worm 102 to limit excessive sliding of the connecting piece.

[0041] The first ratchet 14 and the first pawl 16 rotate in a plane parallel to the side wall of the adapter 10. The cross-section of the first pawl 16 is L-shaped, and a bending portion 161 is provided at its rear end. The plane where the bending portion 161 is located is parallel to or at a certain angle to the bottom surface of the adapter 10. The bending portion 161 can be bent forward (toward the first pawl 16) or in the reverse direction. The connecting piece 21 is connected to the first pawl 16 through the bending portion 161. The connecting piece 21 slides axially along the connecting shaft of the worm 102, driving the front end of the first pawl 16 to extend into the first ratchet 14.

[0042] The worm 102 is detachably connected to the sleeve 22. Specifically, a bumper 101 is provided on the connecting shaft of the worm 102 of the adapter 10, and a side hole (not shown) that cooperates with the bumper is provided on the side wall of the sleeve 22. The bumper 101 collides into the side hole in the sleeve 22 to form a connection.

[0043] The sleeve 22 moves axially along the worm 102 to connect the manual rod 11 and the end of the worm 102 of the adapter 10 . The sleeve 22 slides along the worm 102 to push the connecting piece 21 to slide axially along the worm 102 .

[0044] When in use, the sleeve 22 is connected to the end of the worm of the adapter 10. During the connection process, the front end of the sleeve 22 pushes the connecting piece 21, and the connecting piece 21 drives the first pawl 16 to rotate, so that the front end of the first pawl 16 rotates until the front end profile of the first pawl 16 is stuck in the tooth groove of the first ratchet 14. At the same time, the bead 101 collides with the side hole in the sleeve 22. The sleeve 22 is fixed to the shaft end of the worm 102 of the adapter 10. The manual rod 11 is connected to the sleeve and the manual rod 11 is rotated to realize the recovery of the drawstring. When recycling, the first ratchet 14 and the recovery disk recycle the drawstring in synchronization. The first ratchet 14 rotates forward in one direction, and the end of the connecting piece 21 close to the first pawl 16 jumps up and down. The front end of the first pawl 16 jumps up and down, and the drawstring is recovered smoothly. When it is necessary to stop rotating the manual rod during the recovery period, the recovery disk has a tendency to release the drawstring. At this time, the front end profile of the first pawl 14 is stuck in the tooth groove of the first ratchet 16, and the front end of the first pawl 16 forms a dead point of force, and the drawstring cannot be released. After the drawstring is recovered, the sleeve 22 is removed, the connecting piece 21 loses its support, the elastic force disappears, and the front end contour of the first pawl 16 exits the tooth groove of the first ratchet 14 under the action of the torsion spring or its own gravity, releasing the dead point of force, that is, removing the sleeve 22 will not lock any rotation of the first ratchet 14.

Claims

1. A rail train evacuation ramp release and recovery device, comprising a reducer, a left recovery disk (2) and a right recovery disk (8) provided at both ends of the reducer for winding an evacuation ramp pull belt, characterized in that: The left and right ends of the reducer (9) are respectively provided with a left half-shaft (17) and a right half-shaft (6) connected to the left and right recovery disks, the output end of the reducer is connected to the left half-shaft, and the left and right half-shafts are transmitted through a transition shaft (12). The input end of the reducer is provided with an adapter (10) for deflecting the power direction of the reducer input, a first ratchet (14) and a first pawl (16) for unidirectionally recovering the pull belt; the adapter is provided with a transmission component for connecting to the input end of the reducer, and a deflection component for changing the power direction of the reducer; the end of the transmission component extending out of the adapter is connected to the first ratchet; the end of the deflection component extending out of the adapter is provided with a connecting member for driving the front end of the first pawl to enter the tooth groove of the first ratchet; the far end of the deflection component is provided with a sleeve for connecting to the power device; the sleeve is detachably connected to the deflection component; the connecting member is a connecting plate, and the sleeve pushes the connecting plate to slide along the axial direction of the deflection component; the transmission component is a worm wheel, and the deflection component is a worm (102).

2. The rail train evacuation ramp release and recovery device according to claim 1, characterized in that: The middle of the left and right half shafts are respectively sleeved with a first gear (5), and both ends of the transition shaft are sleeved with a second gear (4) meshing with the first gear. The left and right half shafts rotate synchronously through the first gear, the second gear, and the transition shaft.

3. The rail train evacuation ramp release and recovery device according to claim 1 or 2, characterized in that: The left half shaft is connected to the output end of the speed reducer through a coupling sleeve (18); the left and right half shafts are respectively sleeved with supports (7) for supporting the transition shaft; and the left and right recovery disks are installed with end bearing seats on the side away from the speed reducer.

4. The rail train evacuation ramp release and recovery device according to claim 1 or 2, characterized in that: A damping coil assembly (3) is provided on the left half shaft.

5. The rail train evacuation ramp release and recovery device according to claim 1, characterized in that: The input end of the reducer is connected to a second ratchet (15) and a second pawl (19) for preventing excessive recovery of the drawstring, the first ratchet and the second ratchet are coaxially connected, and the directions of the ratchet teeth of the first ratchet (14) and the second ratchet (15) are opposite.

6. The rail train evacuation ramp release and recovery device according to claim 5, characterized in that: The first pawl and the second pawl are respectively connected to the side wall of the adapter for rotation. The first pawl and the second pawl are arranged up and down. A torsion spring (20) is provided between the first pawl and the adapter or the reducer (9) to separate the front end of the first pawl from the first ratchet.

7. The rail train evacuation ramp release and recovery device according to claim 6, characterized in that: The rear end of the second pawl is connected to the emergency door of the rail train. When the emergency door is opened, the front end of the second pawl is driven to leave the second ratchet tooth groove.

8. The rail train evacuation ramp release and recovery device according to claim 1, characterized in that: The connecting piece is an elastic piece, and the angle of the connecting end of the connecting piece and the first pawl jumping up and down does not exceed 10 degrees.

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