Elevator car safety device

Abstract

The application is suitable for the technical field of elevator car, and provides a safety protection device for elevator car, which comprises a car and a traction rope, and further comprises a T-shaped guide rail, a fixed plate, a guide shaft, a moving plate, a connecting plate, a falling prevention claw, a first spring, a shock absorber, a connecting rope, a guide assembly, a trigger mechanism, a fixed connecting assembly and a reciprocating moving assembly. When the car suddenly drops, the connecting rope also loses traction, the trigger mechanism removes the restriction on the falling prevention claw through the way that the connecting rope loses traction, the first spring on the moving plate pushes the falling prevention claw, and then the falling prevention claw on the moving plate is engaged with the ratchet groove, so that the moving plate does not continue to move downward, the fixed connecting assembly removes the movement restriction on the moving plate through the trigger mechanism, at this time, the car and the fixed plate continue to move downward under the guidance of the guide shaft, the moving plate and the fixed plate lengthen the shock absorber, and then the shock absorber plays a damping effect, so as to avoid the impact on the human body caused by the sudden stop of the car.

Description

Technical Field

[0001] This invention belongs to the field of elevator car technology, and particularly relates to an elevator car safety protection device. Background Technology

[0002] An elevator is a permanent transportation device that serves several specific floors within a building, and whose car moves on at least two rigid tracks that are perpendicular to the horizontal plane or have an angle of inclination of less than 15° to the vertical.

[0003] An elevator car safety protection device with publication number CN 115321303 B describes a device that, when an elevator falls unexpectedly, compresses a spring in the first buffer plate to decelerate the car. The first buffer plate's flat slide pushes a locking block upwards. Under the action of the inclined slide, the locking block slides towards the support column on the flat slide and locks the support column. At the same time, the distance controller detects the decrease in the distance between the first buffer plate and the bottom of the car. The distance controller releases a command to activate the motor, which drives the support column to rotate. After the locking surface contacts the thread on the support column, the rotation of the support column causes the locking block to move upwards, and through the locking part, it drags the car upwards, thus actively decelerating the falling car.

[0004] While the above methods can slow down the vehicle and reduce inertia to some extent, when the locking block locks the support column, there is a large inertial force between the locking block and the support column. At this time, the locking block may damage the threads on the support column, thereby affecting the transmission of the support column to the locking block, which still poses a safety hazard. Summary of the Invention

[0005] The purpose of this invention is to provide an elevator car safety protection device, which aims to solve the problem that although existing devices can reduce speed and inertia to a certain extent, when the locking block locks the support column, there is a large inertial impact force between the locking block and the support column. At this time, the locking block may damage the threads on the support column, which still poses a safety hazard.

[0006] The present invention is implemented as follows: an elevator car safety protection device includes a car and a traction steel cable, and further includes: a T-shaped guide rail, a fixed plate, a guide shaft, a moving plate, a connecting plate, an anti-fall claw, a first spring, a shock absorber, a connecting steel cable, a guide assembly, a triggering mechanism, a fixed connection assembly, and a reciprocating moving assembly;

[0007] The T-shaped guide rail is provided with multiple ratchet grooves. The T-shaped guide rail is installed in the elevator shaft. The car is slidably connected to the T-shaped guide rail through a guide assembly. The guide assembly is used to guide the car's lifting and lowering.

[0008] The fixed plate is fixed to the top of the car, and four guide shafts are fixed on the fixed plate. The movable plate is slidably connected to the guide shafts, and the two ends of the shock absorber are respectively connected to the fixed plate and the movable plate.

[0009] Both ends of the fixed plate and the movable plate are rotatably connected to two anti-fall claws, and a first spring is connected to the anti-fall claw. The end of the first spring is connected to the fixed plate or the movable plate.

[0010] Two connecting steel cables are slidably connected to the movable plate. One end of each connecting steel cable is connected to the connecting plate, which is connected to the traction steel cable. The other end of the connecting steel cables is connected to a trigger mechanism. The fixed connection assembly is installed on the movable plate. When the car is running normally, the trigger mechanism is used to limit the engagement of the anti-fall pawl with the ratchet groove, and the fixed connection assembly is used to limit the movement of the movable plate away from the fixed plate. When the connecting steel cable loses traction, the trigger mechanism releases the restriction on the anti-fall pawl by the loss of traction of the connecting steel cable, and the fixed connection assembly releases the movement restriction on the movable plate by the trigger mechanism.

[0011] The reciprocating moving assembly is located on the top of the car and is used to control the forward and reverse movement of the moving plate relative to the fixed plate in a cyclic manner.

[0012] In a further technical solution, the guide assembly includes a guide protrusion, front and rear guide wheels, and a side wall guide wheel. The T-shaped guide rail is provided with a guide protrusion. Two front and rear guide wheels and one side wall guide wheel are rotatably connected to the side wall of the car. The two front and rear guide wheels are respectively slidably engaged with the two sides opposite to the guide protrusion. The side wall guide wheel is slidably engaged with the side of the guide protrusion away from the T-shaped guide rail.

[0013] In a further technical solution, four T-shaped guide rails are provided, each of which has a guide protrusion. Furthermore, four sets of front and rear guide wheels and side wall guide wheels are provided, with each set of four sets of front and rear guide wheels and side wall guide wheels cooperating with one of the four guide protrusions.

[0014] A further technical solution includes a triggering mechanism comprising a first slider, a pushing wedge, a fixed wedge, a second spring, and a limiting rod. Both the fixed plate and the movable plate are provided with two first sliding grooves. A first slider is slidably connected to each first sliding groove. One end of the first slider is connected to a connecting steel cable, and the other end of the first slider is fixed with two pushing wedges. A fixed wedge that cooperates with the pushing wedges is fixed to the anti-fall claw. A second spring is provided within the first sliding groove, with both ends of the second spring connected to the first slider and the end of the first sliding groove near the anti-fall claw, respectively. The first slider is provided with an insertion hole. Two limiting rods are connected to the end of the movable plate near the fixed plate, and the limiting rods cooperate with the insertion hole of the first slider on the fixed plate.

[0015] In a further technical solution, the fixed connection assembly includes a ratchet rack and a first meshing tooth. The guide shaft is provided with a mounting groove, the ratchet rack is fixed in the mounting groove, the first meshing tooth is slidably connected to the moving plate, and one end of the first meshing tooth engages with the ratchet rack, while the other end of the first meshing tooth is fixed on the first slider.

[0016] A further technical solution is provided, wherein the reciprocating moving component includes a mounting block, a motor, a rotating disk, a push shaft, and a transmission component. The mounting block is fixed to the top of the car, the motor is fixed to one end of the mounting block, the rotating disk is rotatably connected to the other end of the mounting block, the push shaft is fixed on the rotating disk, a long groove is provided on the moving plate, the push shaft is slidably connected to the long groove, and the rotating end of the motor is connected to the rotating disk through the transmission component. The transmission component is used to control the unidirectional transmission connection between the rotating end of the motor and the rotating disk.

[0017] In a further technical solution, the transmission assembly includes a rotating sleeve, a ratchet, a second slider, a third spring, and a second meshing tooth. The ratchet is fixed on the rotating end of the motor, the rotating sleeve is rotatably connected to the mounting block, the rotating sleeve is provided with a second sliding groove, the second slider is slidably connected to the second sliding groove, the two ends of the second slider are respectively connected to the third spring and the second meshing tooth, and the second meshing tooth cooperates with the ratchet. The third spring is disposed in the second sliding groove.

[0018] This invention provides an elevator car safety protection device. When the traction cable loses its traction and the car suddenly drops, the connecting cable also loses its traction. A triggering mechanism releases the restriction on the anti-drop pawl by causing the connecting cable to lose its traction. A first spring on the moving plate pushes the anti-drop pawl, causing it to engage with a ratchet groove, thus preventing the moving plate from moving further downwards. The fixed connection assembly releases the movement restriction on the moving plate through the triggering mechanism. At this time, the car and the fixed plate continue to move downwards under the guidance of the guide shaft. The moving plate and the fixed plate stretch the shock absorber, thereby enabling the shock absorber to achieve a shock absorption effect and preventing impact on the human body from a sudden stop of the car. When the moving plate moves to the upper end of the guide shaft, the first spring on the fixed plate pushes the anti-drop pawl, thus preventing the car from falling. The anti-fall pawls on the fixed plate engage with the ratchet grooves, preventing the fixed plate from moving further downwards and thus stopping the car from descending. If the car is between two floors, a reciprocating motion assembly controls the moving plate to move in both directions relative to the fixed plate. When the moving plate moves towards the fixed plate, the anti-fall pawls on both plates engage with the ratchet grooves, preventing the moving plate from moving downwards. This causes the reciprocating motion assembly to pull the fixed plate upwards, which in turn moves the car upwards. When the moving plate moves away from the fixed plate, the anti-fall pawls on both plates engage with the ratchet grooves, preventing the fixed plate from moving downwards. The moving plate can then move upwards, allowing the car to slowly move upwards to the elevator entrance on the floor, facilitating the rescue of trapped personnel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an elevator car safety protection device provided in an embodiment of the present invention;

[0020] Figure 2 Provided for embodiments of the present invention Figure 1 A structural diagram without the T-shaped guide rail;

[0021] Figure 3 Provided for embodiments of the present invention Figure 1 A magnified structural diagram of E in the middle;

[0022] Figure 4 Provided for embodiments of the present invention Figure 2 A schematic diagram of the structure of the elevator car;

[0023] Figure 5 Provided for embodiments of the present invention Figure 4 A schematic diagram of the rear structure;

[0024] Figure 6 Provided for embodiments of the present invention Figure 4 A schematic diagram of the structure from the main viewpoint;

[0025] Figure 7 Provided for embodiments of the present invention Figure 4 A top-down view of the structure;

[0026] Figure 8 Provided for embodiments of the present invention Figure 6 A schematic diagram of the cross-sectional structure from the perspective of the middle AA (analogous to ...

[0027] Figure 9 Provided for embodiments of the present invention Figure 6 A schematic diagram of the cross-sectional structure from the perspective of the middle BB (British Biological Building).

[0028] Figure 10 Provided for embodiments of the present invention Figure 7 A schematic diagram of the cross-sectional structure from a mid-CC perspective;

[0029] Figure 11 Provided for embodiments of the present invention Figure 7 A schematic diagram of the cross-sectional structure from the perspective of the middle DD (Digital Directional Control).

[0030] Figure 12 Provided for embodiments of the present invention Figure 9 A magnified structural diagram of F.

[0031] In the attached diagram: Car 101, T-shaped guide rail 102, fixed plate 103, guide shaft 104, moving plate 105, connecting plate 106, traction cable 107, anti-fall claw 108, first spring 109, shock absorber 110, connecting cable 111, ratchet groove 112, guide assembly 2, guide protrusion 201, front and rear guide wheels 201, side wall guide wheels 202, trigger mechanism 3, first slide groove 301, first slider 302, pushing wedge 303. Fixed wedge 304, second spring 305, limit rod 306, insertion hole 307, fixed connection assembly 4, mounting groove 401, ratchet rack 402, first meshing tooth 403, reciprocating movement assembly 5, mounting block 501, motor 502, rotating disk 503, long groove 504, push shaft 505, transmission assembly 6, rotating sleeve 601, ratchet 602, second slide groove 603, second slider 604, third spring 605, second meshing tooth 606. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0034] like Figures 1-11As shown, an elevator car safety protection device according to an embodiment of the present invention includes a car 101 and a traction cable 107, and further includes:

[0035] T-shaped guide rail 102, fixed plate 103, guide shaft 104, moving plate 105, connecting plate 106, anti-fall claw 108, first spring 109, shock absorber 110, connecting steel cable 111, guide assembly 2, triggering mechanism 3, fixed connection assembly 4 and reciprocating moving assembly 5;

[0036] The T-shaped guide rail 102 is provided with a plurality of ratchet grooves 112. The T-shaped guide rail 102 is installed in the elevator shaft. The car 101 is slidably connected to the T-shaped guide rail 102 through the guide assembly 2. The guide assembly 2 is used to guide the lifting and lowering of the car 101.

[0037] The fixed plate 103 is fixed to the top of the car 101. Four guide shafts 104 are fixed on the fixed plate 103. The movable plate 105 is slidably connected to the guide shafts 104. The two ends of the shock absorber 110 are respectively connected to the fixed plate 103 and the movable plate 105.

[0038] Both ends of the fixed plate 103 and the movable plate 105 are rotatably connected to two anti-fall claws 108. A first spring 109 is connected to the anti-fall claw 108, and the end of the first spring 109 is connected to the fixed plate 103 or the movable plate 105.

[0039] Two connecting steel cables 111 are slidably connected to the movable plate 105. One end of each connecting steel cable 111 is connected to the connecting plate 106, which is connected to the traction steel cable 107. The other end of the connecting steel cables 111 is connected to the trigger mechanism 3. The fixed connection assembly 4 is disposed on the movable plate 105. When the car 101 is running normally, the trigger mechanism 3 is used to restrict the anti-fall pawl 108 from engaging with the ratchet groove 112. The fixed connection assembly 4 is used to restrict the movable plate 105 from moving away from the fixed plate 103. When the connecting steel cable 111 loses traction, the trigger mechanism 3 releases the restriction on the anti-fall pawl 108 by the loss of traction of the connecting steel cable 111. The fixed connection assembly 4 releases the movement restriction on the movable plate 105 by the trigger mechanism 3.

[0040] The reciprocating moving component 5 is disposed on the top of the car 101, and the reciprocating moving component 5 is used to control the moving plate 105 to move in the forward and reverse directions cyclically relative to the fixed plate 103.

[0041] In this embodiment of the invention, when the traction cable 107 loses its traction and the car 101 drops suddenly, the connecting cable 111 also loses its traction. The triggering mechanism 3 releases the restriction on the anti-fall pawl 108 by causing the connecting cable 111 to lose its traction. The first spring 109 on the moving plate 105 pushes the anti-fall pawl 108, thereby causing the anti-fall pawl 108 on the moving plate 105 to engage with the ratchet groove 112, thus preventing the moving plate 105 from continuing to move downward. The fixed connection assembly 4 is then activated by the triggering mechanism. 3. Release the movement restriction on the movable plate 105. At this time, the car 101 and the fixed plate 103 continue to move downward under the guidance of the guide shaft 104. The movable plate 105 and the fixed plate 103 stretch the shock absorber 110, thereby enabling the shock absorber 110 to play a shock-absorbing role and avoid the impact on the human body caused by the sudden stop of the car 101. When the movable plate 105 moves to the upper end of the guide shaft 104, the first spring 109 on the fixed plate 103 pushes the anti-fall claw 108, thereby causing the fixed plate 103 to... The anti-fall pawl 108 engages with the ratchet groove 112, thereby preventing the fixed plate 103 from moving further downward and the car 101 from moving further downward. At this time, if the car 101 is between two floors, the reciprocating motion assembly 5 controls the moving plate 105 to move cyclically forward and backward relative to the fixed plate 103. When the moving plate 105 moves towards the fixed plate 103, since the anti-fall pawls 108 on both the moving plate 105 and the fixed plate 103 are engaged with the ratchet groove 112, the moving plate 105... Unable to move downwards, the reciprocating moving component 5 pulls the fixed plate 103 upwards, and the fixed plate 103 drives the car 101 upwards. When the moving plate 105 moves away from the fixed plate 103, the fixed plate 103 will not move downwards because the anti-fall claws 108 on both the moving plate 105 and the fixed plate 103 are engaged with the ratchet groove 112. At this time, the moving plate 105 can move upwards, thereby causing the car 101 to slowly move upwards to the elevator entrance of the floor, which is convenient for rescuing the trapped personnel.

[0042] like Figure 1 and Figure 2 As shown, in a preferred embodiment of the present invention, the guide assembly 2 includes a guide protrusion 201, front and rear guide wheels 201, and a side wall guide wheel 202. The T-shaped guide rail 102 is provided with the guide protrusion 201. Two front and rear guide wheels 201 and one side wall guide wheel 202 are rotatably connected to the side wall of the car 101. The two front and rear guide wheels 201 are respectively slidably engaged with the two sides opposite to the guide protrusion 201. The side wall guide wheel 202 is slidably engaged with the side of the guide protrusion 201 away from the T-shaped guide rail 102. There are four T-shaped guide rails 102, and each of the four T-shaped guide rails 102 is provided with a guide protrusion 201. The front and rear guide wheels 201 and the side wall guide wheels 202 are provided in four sets, and the four sets of front and rear guide wheels 201 and side wall guide wheels 202 are respectively engaged with the four guide protrusions 201.

[0043] like Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, in a preferred embodiment of the present invention, the triggering mechanism 3 includes a first slider 302, a pushing wedge 303, a fixing wedge 304, a second spring 305, and a limiting rod 306. Both the fixed plate 103 and the moving plate 105 are provided with two first sliding grooves 301. A first slider 302 is slidably connected to each first sliding groove 301. One end of the first slider 302 is connected to a connecting steel cable 111, and the other end of the first slider 302 is fixed with two pushing wedges 303. The anti-fall claw 1... A fixed wedge 304 that cooperates with the pushing wedge 303 is fixed on the 08. A second spring 305 is provided in the first slide groove 301. The two ends of the second spring 305 are respectively connected to the first slider 302 and the end of the first slide groove 301 near the anti-fall claw 108. An insertion hole 307 is provided on the first slider 302. Two limiting rods 306 are connected to the end of the moving plate 105 near the fixed plate 103. The limiting rods 306 cooperate with the insertion hole 307 of the first slider 302 on the fixed plate 103.

[0044] In this embodiment of the invention, when the traction cable 107 loses its traction force, the connecting cable 111 also loses its traction force. At this time, the first slider 302 on the moving plate 105 loses the tension of the connecting cable 111, and the second spring 305 on the moving plate 105 pulls the first slider 302 to move. The first slider 302 drives the pushing wedge 303 to move, and then the pushing wedge 303 does not engage with the fixed wedge 304. At this time, the first spring 109 on the moving plate 105 pushes the anti-fall pawl 108, and then the anti-fall pawl 108 on the moving plate 105 engages with the ratchet groove 112, so that the moving plate 105 does not continue to move downward. At this time, the moving plate 105 moves upward relative to the car 101, the fixed plate 103 and the guide shaft 104. The moving plate 105 and the fixed plate 103 stretch the shock absorber 110, thereby reducing the shock absorption. Device 110 acts as a shock absorber to prevent the sudden stop of the car 101 from impacting the human body. When the moving plate 105 moves to the upper end of the guide shaft 104, the moving plate 105 drives the limiting rod 306 to disengage from the insertion hole 307 of the first slider 302 on the fixed plate 103. At this time, the first slider 302 on the fixed plate 103 loses the limiting effect of the limiting rod 306. The second spring 305 on the fixed plate 103 pulls the first slider 302, and the first slider 302 drives the pushing wedge 303 to move. Then, the pushing wedge 303 is not engaged with the fixed wedge 304. At this time, the first spring 109 on the fixed plate 103 pushes the anti-fall pawl 108, which in turn makes the anti-fall pawl 108 on the fixed plate 103 engage with the ratchet groove 112, so that the fixed plate 103 does not continue to move downward, and the car 101 does not continue to move downward.

[0045] like Figure 11 As shown, in a preferred embodiment of the present invention, the fixed connection assembly 4 includes a ratchet rack 402 and a first meshing tooth 403. The guide shaft 104 is provided with a mounting groove 401. The ratchet rack 402 is fixed in the mounting groove 401. The first meshing tooth 403 is slidably connected to the moving plate 105, and one end of the first meshing tooth 403 engages with the ratchet rack 402. The other end of the first meshing tooth 403 is fixed on the first slider 302.

[0046] In this embodiment of the invention, when the first slider 302 on the moving plate 105 moves, the first slider 302 drives the first meshing tooth 403 to move, thereby making the first meshing tooth 403 not mesh with the ratchet rack 402. At this time, the guide shaft 104 can move freely relative to the moving plate 105.

[0047] like Figure 4 , Figure 5 and 9 As shown, in a preferred embodiment of the present invention, the reciprocating moving component 5 includes a mounting block 501, a motor 502, a rotating disk 503, a push shaft 505, and a transmission component 6. The mounting block 501 is fixed to the top of the car 101. The motor 502 is fixed to one end of the mounting block 501. The rotating disk 503 is rotatably connected to the other end of the mounting block 501. The push shaft 505 is fixed on the rotating disk 503. The moving plate 105 is provided with a long groove 504. The push shaft 505 is slidably connected to the long groove 504. The rotating end of the motor 502 is connected to the rotating disk 503 through the transmission component 6. The transmission component 6 is used to control the unidirectional transmission connection between the rotating end of the motor 502 and the rotating disk 503.

[0048] In this embodiment of the invention, the motor 502 drives the rotating disk 503 to rotate counterclockwise through the transmission component 6, the rotating disk 503 drives the push shaft 505 to revolve counterclockwise, and the push shaft 505 drives the moving plate 105 to move up and down relative to the car 101 and the fixed plate 103 through the long groove 504.

[0049] like Figure 4 , Figure 9 and Figure 12As shown, in a preferred embodiment of the present invention, the transmission assembly 6 includes a rotating sleeve 601, a ratchet 602, a second slider 604, a third spring 605, and a second meshing tooth 606. The ratchet 602 is fixed on the rotating end of the motor 502. The rotating sleeve 601 is rotatably connected to the mounting block 501. The rotating sleeve 601 is provided with a second sliding groove 603. The second slider 604 is slidably connected to the second sliding groove 603. The two ends of the second slider 604 are respectively connected to the third spring 605 and the second meshing tooth 606, and the second meshing tooth 606 cooperates with the ratchet 602. The third spring 605 is disposed in the second sliding groove 603.

[0050] In this embodiment of the invention, at the initial position, the push shaft 505 is located at the left-middle end of the elongated groove 504. When the moving plate 105 is connected to the T-shaped guide rail 102 via the anti-fall claw 108 and ratchet groove 112, and the car 101 and the fixed plate 103 overcome the spring force of the shock absorber 110 and continue to move downward, the moving plate 105 moves upward relative to the car 101. The moving plate 105 pushes the push shaft 505 through the elongated groove 504, and the push shaft 505 drives the rotating disk 503 to rotate clockwise. The rotating disk 503 drives... When the rotating sleeve 601 rotates clockwise, it will not drive the motor 502 to rotate, thus protecting the motor 502. When the moving plate 105 needs to move back and forth linearly relative to the fixed plate 103, the motor 502 drives the ratchet 602 to rotate counterclockwise. The third spring 605 pushes the second slider 604, and the second slider 604 drives the second meshing tooth 606 to mesh with the ratchet 602. The ratchet 602 drives the rotating disk 503 to rotate counterclockwise through the second meshing tooth 606 and the second slider 604.

[0051] The above embodiments of the present invention provide an elevator car safety protection device. When the traction cable 107 loses its traction force and the car 101 drops suddenly, the connecting cable 111 also loses its traction force. At this time, the first slider 302 on the moving plate 105 loses the tension of the connecting cable 111, and the second spring 305 on the moving plate 105 pulls the first slider 302 to move. The first slider 302 drives the pushing wedge 303 to move, and then the pushing wedge 303 does not engage with the fixed wedge 304. At this time, the first spring 109 on the moving plate 105 pushes the anti-fall pawl 108, thereby causing the anti-fall pawl 108 on the moving plate 105 to engage with the ratchet groove 112, so that the moving plate 105 does not... As the car continues to move downwards, the movable plate 105 moves upwards relative to the car 101, the fixed plate 103, and the guide shaft 104. The movable plate 105 and the fixed plate 103 stretch the shock absorber 110, thereby enabling the shock absorber 110 to absorb shocks and prevent the car 101 from coming to a sudden stop and impacting the people. When the movable plate 105 moves to the upper end of the guide shaft 104, the movable plate 105 drives the limiting rod 306 to disengage from the insertion hole 307 of the first slider 302 on the fixed plate 103. At this time, the first slider 302 on the fixed plate 103 loses the limiting effect of the limiting rod 306, and the second spring 305 on the fixed plate 103 pulls the first slider 302, which in turn drives the first slider 302 to push... When wedge 303 moves, it pushes wedge 303 away from fixed wedge 304. At this time, the first spring 109 on fixed plate 103 pushes anti-fall pawl 108, causing anti-fall pawl 108 on fixed plate 103 to engage with ratchet groove 112, thereby preventing fixed plate 103 from moving further downward and preventing car 101 from moving further downward. At this time, if car 101 is between two floors, motor 502 drives rotating disk 503 to rotate counterclockwise through transmission assembly 6. Rotating disk 503 drives push shaft 505 to revolve counterclockwise. Push shaft 505 drives moving plate 105 to move up and down reciprocally relative to car 101 and fixed plate 103 through long groove 504. When the moving plate 105 moves toward the fixed plate 103, the anti-fall claws 108 on both the moving plate 105 and the fixed plate 103 are engaged with the ratchet groove 112, preventing the moving plate 105 from moving downwards. This causes the reciprocating moving assembly 5 to pull the fixed plate 103 upwards, and the fixed plate 103 drives the car 101 upwards. When the moving plate 105 moves away from the fixed plate 103, the anti-fall claws 108 on both the moving plate 105 and the fixed plate 103 are engaged with the ratchet groove 112, preventing the fixed plate 103 from moving downwards. At this time, the moving plate 105 can move upwards, allowing the car 101 to slowly move upwards to the elevator entrance of the floor, facilitating the rescue of trapped personnel.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An elevator car safety protection device, comprising a car and traction cables, characterized in that, Also includes: T-shaped guide rail, fixed plate, guide shaft, moving plate, connecting plate, anti-fall claw, first spring, shock absorber, connecting steel cable, guide assembly, triggering mechanism, fixed connection assembly and reciprocating moving assembly; The T-shaped guide rail is provided with multiple ratchet grooves. The T-shaped guide rail is installed in the elevator shaft. The car is slidably connected to the T-shaped guide rail through a guide assembly. The guide assembly is used to guide the car's lifting and lowering. The fixed plate is fixed to the top of the car, and four guide shafts are fixed on the fixed plate. The movable plate is slidably connected to the guide shafts, and the two ends of the shock absorber are respectively connected to the fixed plate and the movable plate. Both ends of the fixed plate and the movable plate are rotatably connected to two anti-fall claws, and a first spring is connected to the anti-fall claw. The end of the first spring is connected to the fixed plate or the movable plate. Two connecting steel cables are slidably connected to the movable plate. One end of each connecting steel cable is connected to the connecting plate, which is connected to the traction steel cable. The other end of the connecting steel cables is connected to a trigger mechanism. The fixed connection assembly is installed on the movable plate. When the car is running normally, the trigger mechanism is used to limit the engagement of the anti-fall pawl with the ratchet groove, and the fixed connection assembly is used to limit the movement of the movable plate away from the fixed plate. When the connecting steel cable loses traction, the trigger mechanism releases the restriction on the anti-fall pawl by the loss of traction of the connecting steel cable, and the fixed connection assembly releases the movement restriction on the movable plate by the trigger mechanism. The reciprocating moving component is installed on the top of the car, and the reciprocating moving component is used to control the moving plate to move in the forward and reverse directions cyclically relative to the fixed plate; The triggering mechanism includes a first slider, a pushing wedge, a fixed wedge, a second spring, and a limiting rod. Both the fixed plate and the movable plate are provided with two first sliding grooves. A first slider is slidably connected to each first sliding groove. One end of the first slider is connected to a connecting steel cable, and the other end of the first slider is fixed with two pushing wedges. A fixed wedge that cooperates with the pushing wedges is fixed to the anti-fall claw. A second spring is provided inside the first sliding groove, with both ends of the second spring connected to the first slider and the end of the first sliding groove near the anti-fall claw, respectively. The first slider is provided with an insertion hole. Two limiting rods are connected to the end of the movable plate near the fixed plate, and the limiting rods cooperate with the insertion hole of the first slider on the fixed plate.

2. The elevator car safety protection device according to claim 1, characterized in that, The guiding assembly includes a guide protrusion, front and rear guide wheels, and side wall guide wheels. The T-shaped guide rail is provided with a guide protrusion. Two front and rear guide wheels and one side wall guide wheel are rotatably connected to the side wall of the car. The two front and rear guide wheels are slidably engaged with the two sides opposite to the guide protrusion, and the side wall guide wheel is slidably engaged with the side of the guide protrusion away from the T-shaped guide rail.

3. The elevator car safety protection device according to claim 2, characterized in that, The T-shaped guide rails are provided with four, and each of the four T-shaped guide rails is provided with a guide protrusion. The front and rear guide wheels and the side wall guide wheels are provided with four sets, and the four sets of front and rear guide wheels and the side wall guide wheels respectively cooperate with the four guide protrusions.

4. The elevator car safety protection device according to claim 1, characterized in that, The fixed connection assembly includes a ratchet rack and a first meshing tooth. The guide shaft is provided with a mounting groove. The ratchet rack is fixed in the mounting groove. The first meshing tooth is slidably connected to the moving plate, and one end of the first meshing tooth engages with the ratchet rack. The other end of the first meshing tooth is fixed on the first slider.

5. The elevator car safety protection device according to claim 1, characterized in that, The reciprocating moving assembly includes a mounting block, a motor, a rotating disk, a push shaft, and a transmission assembly. The mounting block is fixed to the top of the car, the motor is fixed to one end of the mounting block, the rotating disk is rotatably connected to the other end of the mounting block, the push shaft is fixed on the rotating disk, the moving plate is provided with a long groove, the push shaft is slidably connected to the long groove, and the rotating end of the motor is connected to the rotating disk through the transmission assembly. The transmission assembly is used to control the unidirectional transmission connection between the rotating end of the motor and the rotating disk.

6. The elevator car safety protection device according to claim 5, characterized in that, The transmission assembly includes a rotating sleeve, a ratchet, a second slider, a third spring, and a second meshing tooth. The ratchet is fixed to the rotating end of the motor. The rotating sleeve is rotatably connected to the mounting block. The rotating sleeve is provided with a second sliding groove. A second slider is slidably connected to the second sliding groove. The two ends of the second slider are respectively connected to the third spring and the second meshing tooth, and the second meshing tooth cooperates with the ratchet. The third spring is disposed in the second sliding groove.

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