Rail transit variable-damping bearing driving device

Abstract

This invention discloses a variable damping load-bearing drive device for rail transit, comprising a screw sleeve connected to a built-in door shaft via a key. The door shaft is keyed to a worm gear reducer connected to left and right couplings. Both ends of the door shaft pass through supports and cable reels, and are mounted on a frame via bearing seats. A nut is provided on the screw sleeve, and a guide sleeve is fitted over the nut. The guide sleeve is installed inside a damping housing. A damping connecting block is mounted on one side of the damping housing, and two limiting posts are mounted on the other side. A slider that moves linearly along a slide rail is mounted on the damping connecting block via screws. The two limiting posts are connected to dampers via movable slider one and movable slider two, respectively. The dampers are fixed on a damper support frame, which is fixed to the slide rail on the frame. This invention provides a variable damping system that controls the uniform speed of release of heavy, large-size emergency evacuation doors, and can safely bear and recover them. It has a simple structure, is easy and comfortable to operate, and improves safety.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle door systems, and more particularly to a variable damping load-bearing drive device for rail transit. Background Technology

[0002] In emergency situations on rail transit trains, such as sudden stops or tilting, it is necessary to open heavy-duty, large-size emergency evacuation door systems for passenger escape. After use, these systems must be retracted. Existing emergency evacuation door systems suffer from uneven release speeds, sometimes fast and sometimes slow.

[0003] Therefore, it is necessary to develop and provide a load-bearing drive device for a variable damping system to overcome the above problems. Summary of the Invention

[0004] Purpose of the invention: To address the shortcomings and defects of existing technologies, this invention provides a variable damping load-bearing drive device for rail transit. It provides a variable damping system to control the uniform speed of release of heavy and large-size emergency evacuation door systems, and can safely bear and retract the load. The device has a simple structure, is easy and comfortable to operate, and improves safety.

[0005] Technical Solution: The present invention provides a variable damping load-bearing drive device for rail transit, characterized in that: it includes a screw sleeve, which is connected to a built-in door shaft via a key. The door shaft is connected to a worm gear reducer and left and right couplings via a key. Both ends of the door shaft pass through supports and cable trays and are mounted on the frame via bearing seats. The screw sleeve is provided with a nut, and a guide sleeve is fitted over the nut. The guide sleeve is installed inside a damping cover. A damping connecting block is installed on one side of the damping cover, and two limiting posts are installed on the other side. The damping connecting block is mounted with a slider that moves linearly along the slide rail via screws. The two limiting posts are respectively connected to a damper via movable slider one and movable slider two. The damper is fixed on a damper support frame, and the damper support frame is fixed to the slide rail on the frame.

[0006] The screw sleeve passes through the mounting support.

[0007] The structure employs a nut and screw sleeve for rotation, a slider and rail for sliding, and a damper assembly to provide varying damping resistance.

[0008] The pull wire disc, coupling, worm gear reducer, end gear disc, end gear bushing, support, and frame are connected in series via the aforementioned door shaft.

[0009] Before the vehicle is put into operation, the variable damping load-bearing drive device is manually operated to retract the emergency evacuation ramp. In an emergency, the variable damping load-bearing drive device does not need to be manually operated. Under the action of gravity, the emergency evacuation ramp can drive the slider to slide along the guide rail through the rotation of the nut and screw sleeve. With the different idle stroke distances set on the damper assembly, the damper assembly is driven to output damping in sequence, controlling the release and deployment speed of the emergency evacuation ramp under the action of gravity, so that the release speed is uniform and slow.

[0010] During the recovery operation: The worm gear reducer is manually operated in the forward direction to drive the rotating door shaft, which in turn drives the screw sleeve to rotate. The screw sleeve drives the nut to rotate through the thread meshing principle. The nut changes the rotational motion into pushing the guide sleeve, damping cover, damping connecting block, and slider to move linearly along the slide rail. The limit post installed on the damping cover pushes the damper during linear motion until the recovery task is completed.

[0011] During the release operation: The pull coil rotates in reverse, causing the door hinge to rotate in reverse, which in turn causes the screw sleeve to rotate in reverse. The screw sleeve drives the nut to rotate in reverse through the threaded engagement principle. The nut changes the reverse rotational motion into a reverse linear motion that pushes the guide sleeve, damping cover, damping connecting block, and slider along the slide rail. The limit post installed on the damping cover, during the reverse linear motion, pushes the movable slider one and movable slider two on the damper. Movable slider one and movable slider two have a free stroke. As the nut rotates with the screw sleeve, it applies axial pressure to the limit post installed on the damping cover. At this point, the damping force on the pull rod is zero. After the limit post moves axially to complete its empty stroke and touches the first movable slider, the limit post pulls the first damper connected to it. At this time, the pull rod begins to output the first damping force, which suppresses the falling speed of the emergency evacuation ramp. When the other limit post moves axially to complete its empty stroke and touches the second movable slider, the two limit posts pull the two dampers connected to it together. At this time, the pull rod begins to output the superimposed damping force, which together suppresses the falling speed of the emergency evacuation ramp, achieving the goal of releasing the emergency evacuation ramp at a uniform and slow speed until the release task is completed.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention adopts a parallel through shaft design; by rotating the nuts and screws connected in series on the through shaft, the rotary motion is converted into the linear reciprocating motion of the slider along the guide rail; by cooperating with the long groove in the movable slider on the damper assembly and the limiting post on the nut assembly, the square wave type damping force output is realized, so as to realize the slow and uniform release speed of the large-weight and large-size emergency evacuation ramp. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2This is a longitudinal cross-sectional view of the nut and screw sleeve of the present invention.

[0015] Figure 3 This is a cross-sectional view of the inside of the nut and screw sleeve of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure in the release start state (release process 0%) of the present invention. Figure 1 ;

[0017] Figure 5 This is a schematic diagram of the structure in the release start state (release process 0%) of the present invention. Figure 2 ;

[0018] Figure 6 This is a schematic diagram of the structure of the present invention in the release process (release progress 20%).

[0019] Figure 7 This is a schematic diagram of the structure of the present invention in the release process (50% release progress);

[0020] Figure 8 This is a schematic diagram of the structure in the release process (release process 80%) of the present invention. Figure 1 ;

[0021] Figure 9 This is a schematic diagram of the structure in the release process (release process 80%) of the present invention. Figure 2 ;

[0022] Figure 10 This is a schematic diagram of the structure of the present invention in the release completion state (release process 100%);

[0023] Figure 11 This is a schematic diagram of the cross-sectional structure of the present invention;

[0024] In the diagram, 1 is the cable reel; 2 is the frame; 3 is the screw sleeve; 4 is the guide sleeve; 5 is the nut; 6 is the worm gear reducer; 7 is the mounting bracket; 8 is the door hinge; 9 is the coupling; 10 is the support; 11 is the damper support frame; 12 is the damper; 13 is the first movable slider; 14 is the limit post; 15 is the slider; 16 is the damping connecting block; 17 is the slide rail; 18 is the damping cover; 19 is the bearing seat; and 20 is the second movable slider. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] The variable damping load-bearing drive device for rail transit of the present invention includes a screw sleeve 3, which is connected to a built-in gantry shaft 8 via a key. The gantry shaft 8 is connected to a worm gear reducer 6 via left and right couplings 9 via a key. Both ends of the gantry shaft 8 pass through supports 10 and cable trays 1 and are mounted on a frame 2 via bearing seats 19. A nut 5 is provided on the screw sleeve 3, and a guide sleeve 4 is fitted over the nut 5. The guide sleeve 4 is installed inside a damping cover 18. A damping connecting block 16 is installed on one side of the damping cover 18, and two limiting posts 14 are installed on the other side. A slider 15 that moves linearly along a slide rail 17 is installed on the damping connecting block 16 via screws. The two limiting posts 14 are connected to a damper 12 via movable slider one 13 and movable slider two 20, respectively. The damper 12 is fixed on a damper support frame 11, and the damper support frame 11 is fixed to the slide rail 17 on the frame 2. The screw sleeve 3 passes through the mounting support 7. The structure employs a nut 5 that rotates in conjunction with a screw sleeve 3, a slider 15 that slides in conjunction with a slide rail 17, and a damper assembly that provides varying damping resistance. The cable reel 1, coupling 9, worm gear reducer 6, end gear disc, end gear bushing, support 10, and frame 2 are connected in series via a pivot 8.

[0027] The variable damping load-bearing drive device of the present invention does not include an unlocking disc, clutch connecting rod, end gear disc, end gear bushing, damping synchronous gear, handle, mounting bracket, reducer mounting base, worm gear reducer, coupling, hydraulic damper, bearing housing, etc.

[0028] Before the vehicle is put into operation, the variable damping load-bearing drive device is manually operated to retract the emergency evacuation ramp. In an emergency, the variable damping load-bearing drive device does not need to be manually operated. Under the action of gravity, the emergency evacuation ramp can drive the slider 15 to slide along the guide rail 17 by rotating the nut 5 and the screw sleeve 3. By using the different distances of idle travel set on the damper assembly, the damper assembly is driven to output damping in sequence, thereby controlling the release and deployment speed of the emergency evacuation ramp under the action of gravity, so that the release speed is uniform and slow.

[0029] During the recovery operation: The worm gear reducer 6 is manually operated in the forward direction to drive the rotating door shaft 8, which in turn drives the screw sleeve 3 to rotate. The screw sleeve 3 drives the nut 5 to rotate through the thread meshing principle. The nut 5 changes the rotational motion into pushing the guide sleeve 4, damping cover 18, damping connecting block 16, and slider 15 to move linearly along the slide rail 17. The limit post 14 installed on the damping cover 18 pushes the damper 12 during linear motion until the recovery task is completed.

[0030] During the release operation: the pull cable disc 1 rotates in reverse, causing the door hinge 8 to rotate in reverse, which in turn causes the screw sleeve 3 to rotate in reverse. The screw sleeve 3 drives the nut 5 to rotate in reverse through the thread engagement principle. The nut 5 changes the reverse rotation motion into a reverse push that drives the guide sleeve 4, damping cover 18, damping connecting block 16, and slider 15 to move in the opposite linear direction along the slide rail 17. The limit post 14 installed on the damping cover 18, when moving in the opposite linear direction, pushes the movable slider 13 and movable slider 20 on the damper 12. The movable slider 13 and movable slider 20 have a free stroke. When the nut 5 rotates with the screw sleeve 3, it applies axial pressure to the damping cover 18. When the limit post 14 is installed, the damping force on the pull plate 1 is zero. After the limit post 14 moves axially to complete its empty stroke and touches the movable slider 13, the limit post 14 pulls the first damper 12 connected to it. At this time, the pull plate 1 starts to output the first damping force to suppress the falling speed of the emergency evacuation ramp. When the other limit post 14 moves axially to complete its empty stroke and touches the movable slider 20, the two limit posts 14 pull the two dampers 12 connected to it together. At this time, the pull plate 1 starts to output the superimposed damping force to jointly suppress the falling speed of the emergency evacuation ramp, so as to achieve the goal of releasing the emergency evacuation ramp at a uniform and slow speed until the release task is completed.

[0031] This invention adopts a parallel through-shaft design; through a damper structure with idle stroke, it achieves square wave type damping force output; the nut screw and slider guide rail structure stably links rotational motion and linear motion; the layout structure is novel and has strong adaptability to heavy loads; the structural layout is novel and easy to operate; it is suitable for emergency evacuation ramps, and has little impact on the size of existing door systems, and can be used in large-size and heavy-weight working conditions.

Claims

1. A variable damping load-bearing drive device for rail transit, characterized in that: The screw sleeve (3) is connected to the built-in gantry (8) via a key. The gantry (8) is connected to the worm gear reducer (6) via a key and to the left and right couplings (9). The two ends of the gantry (8) pass through the support (10) and the cable tray (1) and are then mounted on the frame (2) via the bearing seat (19). The screw sleeve (3) is provided with a nut (5). The nut (5) is fitted with a guide sleeve (4). The guide sleeve (4) is installed inside the damping cover (18). The damping cover (18) is installed inside the damping cover (19). 8) Install a damping connecting block (16) on one side and two limiting posts (14) on the other side; the damping connecting block (16) is installed with a slider (15) that moves linearly along the slide rail (17) by screws; the two limiting posts (14) are connected to the damper (12) by movable slider one (13) and movable slider two (20) respectively, the damper (12) is fixed on the damper support frame (11), and the damper support frame (11) and the slide rail (17) are fixed on the frame (2).

2. The variable damping load-bearing drive device for rail transit according to claim 1, characterized in that: The screw sleeve (3) passes through the mounting bracket (7).

3. The variable damping load-bearing drive device for rail transit according to claim 1, characterized in that: The structure employs a nut (5) and a screw sleeve (3) for rotation, a slider (15) and a slide rail (17) for sliding, and a damper assembly to provide varying damping resistance.

4. The variable damping load-bearing drive device for rail transit according to claim 1, characterized in that: The puller disc (1), coupling (9), worm gear reducer (6), end gear disc, end gear bushing, support (10), and frame (2) are connected in series via the aforementioned gantry (8).

5. The variable damping load-bearing drive device for rail transit according to claim 1, characterized in that: Before the vehicle is in operation, the variable damping load drive device is manually operated to retract the emergency evacuation ramp. In an emergency, the variable damping load drive device does not need to be manually operated. The emergency evacuation ramp can be driven by gravity to slide the slider (15) along the guide rail (17) through the rotation of the nut (5) and the screw sleeve (3). By relying on the different distances of idle travel set on the damper assembly, the damper assembly is driven to output damping in sequence, controlling the release and unfolding speed of the emergency evacuation ramp under the action of gravity, so that the release speed is uniform and slow.

6. The variable damping load-bearing drive device for rail transit according to claim 5, characterized in that: During the recycling operation: The worm gear reducer (6) is manually operated in the forward direction to drive the rotating door shaft (8), which in turn drives the screw sleeve (3) to rotate. The screw sleeve (3) drives the nut (5) to rotate through the thread meshing principle. The nut (5) changes the rotational motion into pushing the guide sleeve (4), damping cover (18), damping connecting block (16), and slider (15) to move linearly along the slide rail (17). The limit post (14) installed on the damping cover (18) pushes the damper (12) during linear motion until the recycling task is completed.

7. The variable damping load-bearing drive device for rail transit according to claim 5, characterized in that: During the release operation: the pull coil (1) rotates in the reverse direction, driving the door hinge (8) to rotate in the reverse direction, which in turn drives the screw sleeve (3) to rotate in the reverse direction. The screw sleeve (3) drives the nut (5) to rotate in the reverse direction through the thread meshing principle. The nut (5) changes the reverse rotation motion into a reverse push that drives the guide sleeve (4), damping cover (18), damping connecting block (16), and slider (15) to move in the opposite linear direction along the slide rail (17). The limit post (14) installed on the damping cover (18) pushes the movable slider one (13) and movable slider two (20) on the damper (12) when it moves in the opposite linear direction. The movable slider one (13) and movable slider two (20) have a free stroke. When the nut (5) rotates with the screw sleeve (3), it applies axial pressure to the damper. On the limit post (14) installed on the cover (18), the damping force on the pull plate (1) is zero. After the limit post (14) moves axially to complete the empty stroke and touches the first movable slider (13), the limit post (14) pulls the first connected damper (12). At this time, the pull plate (1) starts to output the first damping force to suppress the falling speed of the emergency evacuation ramp. When the other limit post (14) moves axially to complete the empty stroke and touches the second movable slider (20), the two limit posts (14) pull the two connected dampers (12) together. At this time, the pull plate (1) starts to output the superimposed damping force to jointly suppress the falling speed of the emergency evacuation ramp, so as to achieve the goal of releasing the emergency evacuation ramp at a uniform and slow speed until the release task is completed.

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