An elevator car anti-overshot device

Abstract

The application relates to the technical field of elevators, and discloses an elevator car anti-collision device, which comprises an elevator shaft and a car capable of vertically sliding in the elevator shaft, and further comprises an anti-collision mechanism installed in the elevator shaft, the anti-collision mechanism is located on one side close to the top of the elevator shaft, the anti-collision mechanism comprises a mounting plate fixedly installed in the elevator shaft, an arc-shaped plate is installed on one side of the mounting plate close to the car, two ends of the arc-shaped plate are in sliding connection with the mounting plate, the arc-shaped plate is convex towards one side close to the top of the car, and a buffer assembly capable of absorbing the impact force of the car is installed on one side of the arc-shaped plate close to the mounting plate. The application has the effect of reducing the speed of the elevator car when the elevator car is in failure and collides with the top of the elevator shaft, thereby avoiding damage to the elevator and personal injury of accompanying passengers in the elevator.

Description

Technical Field

[0001] This application relates to the technical field of elevators, and in particular, to an anti-overrun device for an elevator car. Background Art

[0002] Elevators are widely used in buildings with several floors. When an elevator fails, the elevator car may get out of control and rush rapidly towards the top of the elevator shaft. The violent collision during the overrun process not only easily damages the elevator but also easily harms the accompanying passengers in the car.

[0003] Currently, related anti-overrun devices for elevator cars, such as the Chinese patent "An anti-overrun structure for a freight elevator" with the authorization announcement number CN115611112A, disclose an anti-overrun structure for a freight elevator, including an elevator shaft. Inside the elevator shaft, there is a car. On the left and right side surfaces inside the elevator shaft, guide rails are symmetrically fixedly connected front and back. The left and right side surfaces of the car are respectively slidably connected to the guide rails through sliding sleeves. An anti-overrun mechanism is provided above the inside of the elevator shaft. The anti-overrun mechanism includes a "hui"-shaped baffle located directly above the car. On both the front and back sides of the baffle, T-shaped skateboards are symmetrically fixedly connected left and right. On the front and back side surfaces above the inside of the elevator shaft, chutes matching the T-shaped structures at the ends of the skateboards are opened. This anti-overrun structure for a freight elevator阻拦 the ascending car, causing the car to stop when approaching the top of the elevator shaft and reducing the situation of the car overrun.

[0004] This application solves the same technical problem in the related technology, that is, by setting an anti-overrun structure to reduce the situation where the elevator car rushes rapidly towards the top of the elevator shaft when a failure occurs, causing damage to the elevator and personal injury to the accompanying passengers in the elevator. Summary of the Invention

[0005] In order to reduce the situation where the elevator car overruns rapidly when an elevator fails, causing damage to the elevator and personal injury to the passengers in the car, this application provides an anti-overrun device for an elevator car.

[0006] The anti-overrun device for an elevator car provided by this application adopts the following technical solution:

[0007] An anti-overrun device for an elevator car includes an elevator shaft and a car that can slide vertically in the elevator shaft, and further includes an anti-overrun mechanism installed in the elevator shaft. The anti-overrun mechanism is located on one side close to the top of the elevator shaft. The anti-overrun mechanism includes a mounting plate fixedly installed in the elevator shaft. On the side of the mounting plate close to the car, an arc-shaped plate is installed. Both ends of the arc-shaped plate are slidably connected to the mounting plate. The arc-shaped plate bulges towards the side close to the top of the car. On the side of the arc-shaped plate close to the mounting plate, a buffer component capable of absorbing the impact force of the car is installed.

[0008] By adopting the above technical solution, under normal circumstances, the elevator car moves up and down in the elevator shaft under the hoisting of the traction machine and ropes. When the elevator malfunctions and overshoots the top, the anti-overshoot mechanism is set on the side near the top of the elevator shaft. This can reduce the possibility of the car hitting the traction machine at the top of the elevator shaft. When the curved plate is subjected to the impact force of the car sliding upward, the two ends of the curved plate slide away from each other, and the distance between the middle of the curved plate and the mounting plate is shortened, which compresses the buffer component. The curved plate and the buffer component together absorb the impact force of the car, reducing the possibility of damage to the car caused by overshooting and personal injury to passengers in the car.

[0009] Optionally, the buffer assembly includes a buffer rod fixed to the mounting plate and a sleeve fixed to the arc plate. The buffer rod and the sleeve are arranged opposite to each other and are inserted into each other. A buffer spring is also fixed between the buffer rod and the sleeve. One end of the buffer spring is fixedly connected to the buffer rod and the other end is fixedly connected to the sleeve.

[0010] By adopting the above technical solution, when the buffer assembly is subjected to the impact force when the car hits the top, the buffer rod retracts into the sleeve and the buffer spring is compressed, thereby absorbing the impact force of the car and reducing the damage to the car caused by the impact and the personal injury to the passengers in the car due to the inertia of impacting the car.

[0011] Optionally, the upper end of the car is fixed with a rope for traction and lifting of the car. The rope passes through the mounting plate. There are multiple arc-shaped plates, which are symmetrically arranged about the mounting plate. Each arc-shaped plate has a first abutment block installed at the end near the rope. When the arc-shaped plate is deformed by an impact force, the adjacent first abutment blocks move closer to each other and abut against the rope.

[0012] By adopting the above technical solution, when the arc plate is subjected to impact force, the end with the first abutment block slides towards the rope and presses against the rope, increasing the friction force of the rope sliding upward, which reduces the rope from continuing to slide upward, thereby slowing down the car and reducing the possibility of the car overshooting the top.

[0013] Optionally, a limiting component is provided between the arc-shaped plate and the mounting plate to reduce the arc-shaped plate from detaching from the mounting plate in the vertical direction. The limiting component includes a limiting block and a limiting groove. The limiting block is fixed to the end of the arc-shaped plate near the mounting plate. The limiting groove is opened on the side of the mounting plate near the arc-shaped plate. The length direction of the limiting groove is parallel to the sliding direction of the first abutment block. The width of the limiting block on the side away from the arc-shaped plate is greater than the width of the limiting block on the side near the arc-shaped plate. The limiting block and the limiting groove are slidably connected.

[0014] By adopting the above technical solution, the limiting component ensures that both ends of the arc plate can slide smoothly on the mounting plate, and the width of the limiting block on the side away from the arc plate is greater than the width of the limiting block on the side close to the arc plate, reducing the possibility of the limiting block disengaging from the limiting groove vertically, thereby reducing the possibility of the arc plate disengaging from the mounting plate.

[0015] Optionally, a stabilizing mechanism is also provided between the elevator shaft and the car to keep the car stably stopped in the elevator shaft in the event of an elevator malfunction.

[0016] By adopting the above technical solution, when the elevator malfunctions and overshoots the top, the anti-overshoot mechanism acts as a buffer, absorbing the impact force of the car. When the car hits the anti-overshoot mechanism, the car may slide downwards due to the reaction force. The stabilizing mechanism stabilizes the car, reducing the possibility of the car sliding down. In addition, the anti-overshoot mechanism absorbs the impact force of the car, reducing the possibility of the car directly impacting the stabilizing mechanism and causing damage to the stabilizing mechanism.

[0017] Optionally, the stabilizing mechanism includes a sliding plate that is slidably installed on the inner wall of the elevator shaft and can automatically return to its initial position. The sliding direction of the sliding plate is perpendicular to the lifting direction of the car. A stabilizing block is fixed on the side of the sliding plate away from the top of the elevator shaft. A locking slot is provided on the stabilizing block, which is located on the side close to the sliding plate. The stabilizing block also has a vertical part and an inclined part. The vertical part is located between the inclined part and the locking slot. The inclined part is gradually inclined downward from the side close to the locking slot. A locking rod is fixedly extended from the side wall of the car facing the elevator shaft. The side wall of the locking rod can slide along the inclined part and the vertical part in sequence and lock into the locking slot.

[0018] By adopting the above technical solution, when the car impacts the anti-collision mechanism upwards, the locking rod slides vertically, and the side wall of the locking rod slides along the inclined part and the vertical part, and finally slides into the locking hole to lock, so that the locking rod cannot continue to slide in the vertical direction, thereby achieving stable fixation of the car; during the process of the locking rod sliding along the inclined part, it drives the sliding plate to slide laterally, and the inclined part reduces the impact speed of the car to a certain extent, playing a buffering effect, thereby reducing the serious collision of the car.

[0019] Optionally, a sliding block is fixed to the side of the sliding plate near the elevator shaft, and a sliding groove is provided on the side wall of the elevator shaft. The length direction of the sliding groove is perpendicular to the lifting direction of the car. The width of the sliding block on the side away from the sliding plate is greater than the width of the sliding block on the side near the sliding plate. The sliding block is slidably connected to the sliding groove. A return spring is fixed between the sliding block and the sliding groove. The length direction of the return spring is parallel to the length direction of the sliding groove.

[0020] By adopting the above technical solution, the sliding block and the sliding groove cooperate to reduce the situation where the sliding plate is dislodged from the elevator shaft, and the return spring provides a pulling force to restore the sliding block to its initial position, so that the stabilizing block fixed on the sliding plate can engage with the locking rod, thereby realizing automatic locking during the car's top-rushing process.

[0021] Optionally, a second abutment block is fixed at the end of the arc-shaped plate away from the first abutment block. The second abutment block is disposed opposite to the sliding plate. When the arc-shaped plate is subjected to the impact force of the car, the second abutment block slides towards the sliding plate and can abut against the sliding plate.

[0022] By adopting the above technical solution, the arc plate can be transformed into a lateral force after being subjected to the vertical compression force of the elevator car, so that the second abutment block presses against the sliding plate, reducing the sliding speed of the sliding plate and buffering the process of the locking rod engaging the locking slot. This reduces damage to the stabilizing mechanism and better absorbs the impact force of the car hitting the top, reducing damage to the car and passengers.

[0023] Optionally, the sliding plate is also fixed with a reset rod for moving the sliding plate within the elevator shaft, and the side wall of the elevator shaft is provided with a reset port through which the reset rod extends.

[0024] By adopting the above technical solution, when the elevator is restored to normal after maintenance, the reset rod can be manually moved to slide laterally, thereby causing the sliding plate to slide laterally and thus realizing the locking rod disengaging from the lock.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The curved plate and the buffer assembly work together to absorb the impact force of the car, reducing damage to the car and personal injury to passengers inside the car;

[0027] 2. When the curved plate is subjected to impact force, the end with the first abutment block slides towards the rope and presses against the rope, increasing the friction of the rope sliding upward, thereby slowing down the car and reducing the possibility of the car overshooting the top.

[0028] 3. When the car hits the anti-collision mechanism, the car may slide downwards due to the reaction force. The stabilizing mechanism stabilizes the car and reduces the possibility of the car sliding down. The anti-collision mechanism also absorbs the impact force of the car, reducing the direct impact of the car on the stabilizing mechanism and preventing damage to the stabilizing mechanism. Attached Figure Description

[0029] Figure 1 This is a structural diagram of the anti-collision mechanism, the elevator car, and the elevator shaft.

[0030] Figure 2This is an exploded view of the buffer assembly.

[0031] Figure 3 This is a structural diagram of the stabilizing mechanism, elevator shaft, and anti-collision mechanism.

[0032] Figure 4 This is a schematic diagram of the stabilizing mechanism.

[0033] Explanation of reference numerals in the attached drawings: 1. Elevator shaft; 11. Guide block; 12. Sliding groove; 13. Reset port; 2. Car; 21. Guide rail; 22. Rope; 23. Locking rod; 3. Anti-collision mechanism; 31. Mounting plate; 311. Through hole; 32. Arc plate; 321. First abutment block; 322. Second abutment block; 33. Buffer assembly; 331. Buffer rod; 332. Sleeve; 333. Buffer spring; 34. Limiting assembly; 341. Limiting block; 342. Limiting groove; 4. Stabilizing mechanism; 41. Sliding plate; 411. Sliding block; 412. Reset spring; 42. Stabilizing block; 421. Locking port; 422. Vertical part; 423. Inclined part; 5. Reset rod. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail.

[0035] This application discloses an elevator car anti-collision device.

[0036] Reference Figure 1 An elevator car anti-collision device includes a hollow elevator shaft 1, which is vertically arranged. A car 2 is installed inside the elevator shaft 1 and can move up and down inside the elevator shaft 1. An anti-collision mechanism 3 and a stabilizing mechanism 4 are installed inside the elevator shaft 1. The anti-collision mechanism 3 is located near the top of the elevator shaft 1 to absorb damage to the car 2 caused by the car 2 hitting the top and personal injury to passengers inside the car 2 due to inertia. The stabilizing mechanism 4 further stabilizes the car 2 and reduces the possibility of the car 2 falling back down due to gravity after moving upward.

[0037] Two guide rails 21 are fixed at intervals on each of the two parallel side walls of the car 2. The guide rails 21 are vertically arranged. Guide blocks 11 are fixed on the side wall of the elevator shaft 1. The guide blocks 11 are opposite to the guide rails 21 one by one, and the guide blocks 11 can slide vertically in the guide rails 21, so that the car 2 can only slide vertically in the elevator shaft 1.

[0038] A rope 22 is fixed to the upper end of the car 2. The rope 22 is fixedly connected to the center of the car 2. The end of the rope 22 away from the car 2 is connected to the traction equipment (not shown in the figure). The car 2 slides up and down by the traction of the rope 22.

[0039] The anti-collision mechanism 3 includes a mounting plate 31. A through hole 311 for the vertical passage of the rope 22 is provided in the middle of the mounting plate 31. The mounting plate 31 is horizontally fixed on one side near the upper end of the elevator shaft 1. The car 2 is always located below the mounting plate 31. Multiple arc-shaped plates 32 are fixed on the lower surface of the mounting plate 31. In this embodiment, there are two arc-shaped plates 32. The two arc-shaped plates 32 are symmetrically arranged about the through hole 311. The arc-shaped plates 32 are made of elastic material. Both ends of each arc-shaped plate 32 are slidably connected to the mounting plate 31. The arc-shaped plates 32 are raised towards one side of the car 2. Multiple buffer components 33 are fixed in the middle of the arc-shaped plates 32. The multiple buffer components 33 are spaced apart along the length direction of the arc-shaped plates 32.

[0040] The buffer assembly 33 includes a buffer rod 331 and a sleeve 332. One end of the buffer rod 331 is fixedly connected to the mounting plate 31, and the other end is inserted into the sleeve 332 fixed on the arc plate 32. A buffer spring 333 is also fixed inside the sleeve 332. One end of the buffer spring 333 is fixedly connected to the end of the buffer rod 331 near the sleeve 332, and the other end is fixedly connected to the bottom wall of the sleeve 332. When the arc plate 32 is subjected to an upward impact force from the car 2, the arc plate 32 deforms, and the two ends of the arc plate 32 slide horizontally in a direction away from each other. At the same time, the buffer rod 331 and the sleeve 332 move closer to each other, and the buffer spring 333 is compressed to absorb the impact force of the car 2.

[0041] Reference Figure 1 and Figure 2 Multiple limiting components 34 are provided between the arc-shaped plate 32 and the mounting plate 31. These limiting components 34 are spaced apart between the arc-shaped plate 32 and the mounting plate 31. The limiting components 34 ensure that when the arc-shaped plate 32 deforms, the two sides of the arc-shaped plate 32 parallel to the mounting plate 31 can slide horizontally on the mounting plate 31. Each limiting component 34 includes a limiting block 341 and a limiting groove 342. The limiting block 341 is fixedly installed on the side of the arc-shaped plate 32 closest to the mounting plate 31. The width of the end of the limiting block 341 away from the arc-shaped plate 32 is greater than the width of the end closest to the arc-shaped plate 32. The limiting groove 342 is formed on the side of the mounting plate 31 closest to the arc-shaped plate 32. The length direction of the limiting groove 342 is perpendicular to the upward direction of the car 2. The limiting block 341 and the limiting groove 342 are arranged opposite each other, and the limiting block 341 can slide horizontally within the limiting groove 342, reducing the possibility of the limiting block 341 disengaging from the limiting groove 342 in the vertical direction.

[0042] A first abutment block 321 is fixed on the side of the arc-shaped plate 32 closest to the rope 22, and a second abutment block 322 is fixed on the side of the arc-shaped plate 32 away from the rope 22. When the arc-shaped plate 32 is deformed by the impact force of the car 2, the first abutment blocks 321 on the adjacent arc-shaped plates 32 move closer to each other and abut against the rope 22, increasing the friction force of the rope 22 sliding upward, thereby reducing the impact force of the car 2 sliding upward; the second abutment block 322 slides towards the side wall of the elevator shaft 1.

[0043] Reference Figure 3 and Figure 4 The stabilizing mechanism 4 includes a sliding plate 41, which is slidably installed on the side wall of the elevator shaft 1. The sliding plate 41 is disposed opposite to the second abutment block 322. The second abutment block 322 can slide horizontally out of the mounting plate 31 and abut against the sliding plate 41, thereby reducing the sliding speed of the sliding plate 41.

[0044] A sliding block 411 is fixed on the side of the sliding plate 41 near the side wall of the elevator shaft 1. The width of the side of the sliding block 41 away from the sliding plate 41 is greater than the width of the side near the sliding plate 41. A sliding groove 12 is provided on the side wall of the elevator shaft 1. The length direction of the sliding groove 12 is perpendicular to the length direction of the limiting groove 342. The sliding block 411 is slidably connected to the sliding groove 12, and the sliding block 411 can slide along the length direction of the sliding groove 12, so that the sliding plate 41 can slide horizontally along the side wall of the elevator shaft 1.

[0045] A reset spring 412 is also fixed inside the sliding groove 12. One end of the reset spring 412 is fixedly connected to the sliding block 411, and the other end of the reset spring 412 is fixedly connected to the inner wall of the sliding groove 12. The reset spring 412 causes the sliding plate 41, which has been sliding horizontally, to automatically return to its initial position.

[0046] Reference Figure 4 The lower end of the sliding plate 41 is fixed with a plurality of stabilizing blocks 42, and in this embodiment there are three. Each stabilizing block 42 has a locking slot 421 on the side near the sliding plate 41. Each stabilizing block 42 also has a vertical part 422 and an inclined part 423. The vertical part 422 is located between the inclined part 423 and the locking slot 421. The vertical part 422 is set vertically, and the inclined part 423 is set inclined downward from the side near the vertical part 422 to the side away from the vertical part 422.

[0047] Reference Figure 3 and Figure 4A locking rod 23 is fixed on the car 2, which is opposite to the stabilizing block 42. The locking rod 23 corresponds to the stabilizing block 42 one by one. One end of the locking rod 23 is fixedly connected to the side wall of the car 2, and the other end of the locking rod 23 extends horizontally toward the side wall of the elevator shaft 1. The circumferential surface of the locking rod 23 can slide along the inclined part 423 and the vertical part 422 in sequence and slide into the locking slot 421 to achieve locking. When the circumferential surface of the locking rod 23 slides vertically along the inclined part 423, it drives the sliding plate 41 to slide horizontally. The vertical part 422 provides the return spring 412 with the time to return the sliding plate 41 to the lock. When the locking rod 23 slides to the locking slot 421, the return spring 412 drives the sliding plate 41 to the lock and makes the locking rod 23 and the locking slot 421 lock each other, reducing the possibility of the car 2 falling in the elevator shaft 1.

[0048] Reference Figure 3 The elevator shaft 1 is also provided with a reset port 13 through the side wall. The reset port 13 is connected to the sliding groove 12. The length direction of the reset port 13 is parallel to the length direction of the sliding groove 12. A reset rod 5 is fixed on the side of the sliding block 411 away from the sliding plate 41. The reset rod 5 extends horizontally out of the reset port 13. When the elevator car 2 is restored to normal after maintenance, the sliding plate 41 is slid horizontally by moving the reset rod 5 horizontally. At the same time, the stabilizing block 42 is slid horizontally, so that the locking port 421 is away from the locking rod 23, thereby realizing the restoration of normal operation of the car 2.

[0049] The implementation principle of the elevator car anti-overhead device in this embodiment is as follows: The anti-overhead mechanism 3 is located on one side near the top of the elevator shaft 1. When the elevator malfunctions and overhead occurs, the anti-overhead mechanism 3 absorbs the impact force of the car 2. After being impacted, the two ends of the arc plate 32 slide horizontally in a direction away from each other, so that the adjacent first abutment block 321 abuts against the rope 22, which plays a role in deceleration. The second abutment block 322 can abut against the sliding plate 41. During the ascent of the car 2, the locking rod 23 slides along the inclined part 423. When the sliding plate 41 slides horizontally, the second abutting block 322 abuts against the sliding plate 41, reducing the sliding speed of the sliding plate 41, thereby protecting the stabilizing mechanism 4 and preventing the car 2 from impacting upwards and causing damage to the stabilizing mechanism 4. The stabilizing mechanism 4 locks the car 2, reducing the possibility of the car 2 falling due to the reaction force after impacting the anti-collision mechanism 3. The stabilizing mechanism 4 enhances the stability of the car 2 in case of failure, reducing the possibility of damage to the car 2 and personal injury to passengers in the car 2.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An elevator car anti-overhead device, comprising an elevator shaft (1) and a car (2) capable of vertically sliding within the elevator shaft (1), characterized in that: It also includes an anti-impact mechanism (3) installed in the elevator shaft (1). The anti-impact mechanism (3) is located on the side near the top of the elevator shaft (1). The anti-impact mechanism (3) includes a mounting plate (31) fixedly installed in the elevator shaft (1). An arc plate (32) is installed on the side of the mounting plate (31) near the car (2). The two ends of the arc plate (32) are slidably connected to the mounting plate (31). The arc plate (32) bulges towards the side near the top of the car (2). A buffer component (33) capable of absorbing the impact force of the car (2) is installed on the side of the arc plate (32) near the mounting plate (31). The buffer assembly (33) includes a buffer rod (331) fixed on the mounting plate (31) and a sleeve (332) fixed on the arc plate (32). The buffer rod (331) and the sleeve (332) are arranged opposite to each other and are inserted into each other. A buffer spring (333) is also fixed between the buffer rod (331) and the sleeve (332). One end of the buffer spring (333) is fixedly connected to the buffer rod (331) and the other end is fixedly connected to the sleeve (332). The upper end of the car (2) is fixed with a rope (22) for pulling the car (2) up and down. The rope (22) passes through the mounting plate (31). There are multiple arc plates (32), which are symmetrically arranged about the mounting plate (31). Each arc plate (32) has a first abutment block (321) installed on one end near the rope (22). When the arc plate (32) is deformed by impact force, the adjacent first abutment blocks (321) approach each other and abut against the rope (22).

2. The elevator car anti-overrush device according to claim 1, characterized in that: A limiting component (34) is provided between the arc plate (32) and the mounting plate (31) to reduce the arc plate (32) from detaching from the mounting plate (31) in the vertical direction. The limiting component (34) includes a limiting block (341) and a limiting groove (342). The limiting block (341) is fixed at one end of the arc plate (32) near the mounting plate (31). The limiting groove (342) is opened on the side of the mounting plate (31) near the arc plate (32). The length direction of the limiting groove (342) is parallel to the sliding direction of the first abutment block (321). The width of the limiting block (341) on the side away from the arc plate (32) is greater than the width of the limiting block (341) on the side near the arc plate (32). The limiting block (341) and the limiting groove (342) are slidably connected.

3. The elevator car anti-overrush device according to claim 1, characterized in that: A stabilizing mechanism (4) is also provided between the elevator shaft (1) and the car (2) to ensure that the car (2) stops stably in the elevator shaft (1) when the elevator malfunctions.

4. The elevator car anti-overrush device according to claim 3, characterized in that: The stabilizing mechanism (4) includes a sliding plate (41) that is slidably installed on the inner wall of the elevator shaft (1) and can automatically return to its initial position. The sliding direction of the sliding plate (41) is perpendicular to the lifting direction of the car (2). A stabilizing block (42) is fixed on the side of the sliding plate (41) away from the top of the elevator shaft (1). A locking slot (421) is provided on the stabilizing block (42). The locking slot (421) is located on the side close to the sliding plate (41). The stabilizing block (42) also has It has a vertical part (422) and an inclined part (423). The vertical part (422) is located between the inclined part (423) and the lock (421). The inclined part (423) is gradually inclined downward from the side near the lock (421). A locking rod (23) is fixedly extended from the side wall of the car (2) facing the elevator shaft (1). The side wall of the locking rod (23) can slide along the inclined part (423) and the vertical part (422) in sequence and be inserted into the lock (421).

5. The elevator car anti-overrush device according to claim 4, characterized in that: A sliding block (411) is fixed on the side of the sliding plate (41) near the elevator shaft (1). A sliding groove (12) is provided on the side wall of the elevator shaft (1). The length direction of the sliding groove (12) is perpendicular to the lifting direction of the car (2). The width of the side of the sliding block (411) away from the sliding plate (41) is greater than the width of the side of the sliding block (411) near the sliding plate (41). The sliding block (411) is slidably connected to the sliding groove (12). A return spring (412) is fixed between the sliding block (411) and the sliding groove (12). The length direction of the return spring (412) is parallel to the length direction of the sliding groove (12).

6. The elevator car anti-overrush device according to claim 1, characterized in that: The arc plate (32) is fixed with a second abutment block (322) at one end away from the first abutment block (321). The second abutment block (322) is arranged opposite to the sliding plate (41). When the arc plate (32) is subjected to the impact force of the car (2), the second abutment block (322) slides toward the sliding plate (41) and can abut against the sliding plate (41).

7. The elevator car anti-overrush device according to claim 4, characterized in that: The sliding plate (41) is also fixed with a reset rod (5) for moving the sliding plate (41) to slide in the elevator shaft (1). The side wall of the elevator shaft (1) is provided with a reset port (13), and the reset rod (5) extends through the reset port (13).

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