Car elevator locking device

Abstract

The application relates to the elevator safety technical field, in particular to a car elevator locking device, which comprises a car body and a slide rail, a wheel frame is fixed on the car body, a roller is rotationally connected to the wheel frame through a fixed shaft, and the roller rolls on the slide rail; the locking device further comprises: a falling prevention mechanism arranged at the bottom of the car body and used for preventing the car body from falling off; a stopping assembly arranged on the wheel frame and used for stopping the roller; and a clamping mechanism arranged at the side of the car body and used for clamping and locking the falling prevention mechanism, wherein the clamping mechanism is transmissionally connected to the falling prevention mechanism through a pipeline. The car elevator locking device can lock the car body on the slide rail through the falling prevention mechanism and the clamping mechanism, prevent the car body from falling off, and stop the car body from falling off in an emergency, so that the elevator system safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of elevator safety technology, specifically to a car-type elevator locking device. Background Technology

[0002] Elevators, as tools for transporting people and goods, are widely used in high-rise buildings and industrial plants. The reliability of the elevator itself plays a crucial role in ensuring the safety of life and property. Therefore, regular maintenance of elevators is necessary. When inspecting an elevator, the car needs to be raised to a designated position and secured in that position to maintain a safe condition for maintenance work. In view of this, we propose a car-type elevator locking device. Summary of the Invention

[0003] The purpose of this invention is to provide a car-type elevator locking device to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a car-type elevator locking device, comprising a car body and a slide rail, a wheel frame fixed on the car body, and a roller rotatably connected to the wheel frame on a fixed axis, the roller rolling on the slide rail, and further comprising:

[0004] Anti-fall mechanism: The anti-fall mechanism is located at the bottom of the car body and is used to prevent the car body from falling off.

[0005] The stopping component is mounted on the wheel frame and is used to stop the roller. The anti-drop mechanism is connected to the stopping component in a transmission manner.

[0006] The clamping mechanism is located on the side of the car body. The clamping mechanism is used to clamp and lock the anti-detachment mechanism, and the clamping mechanism is connected to the anti-detachment mechanism through a pipeline.

[0007] Preferably, the anti-fall-off mechanism includes a pump cylinder 1 fixed to the bottom of the car body. A partition is fixed to the middle of the inner side of the pump cylinder 1, and the partition divides the interior of the pump cylinder 1 into two identical spaces. An adjusting cylinder is fixed to both end walls of the pump cylinder 1, and the adjusting cylinder is connected to the corresponding space. A sliding plate 3 is slidably connected inside the adjusting cylinder, and the sliding plate 3 is connected to one end of the adjusting cylinder through a spring 3. A sliding plate 1 is slidably connected in both spaces, and the sliding plate 1 is connected to the partition through a spring 1. A top rod is fixed on the sliding plate 1, and the top rod passes through and is slidably connected to the end wall of the corresponding pump cylinder 1. A locking block is fixed to the end of the top rod away from the sliding plate 1. A groove is fixed on the slide rail, and a protrusion structure corresponding to the groove is provided on the locking block.

[0008] Preferably, an electric pump is fixed on the upper part of the car body, and the inlet end of the electric pump is connected to the two spaces through a conduit one, and the outlet end of the electric pump is connected to the clamping mechanism through a conduit two. A trigger switch is provided inside the car body, and the trigger switch is electrically connected to the electric pump.

[0009] Preferably, a manual pump is installed inside the car body. The inlet end of the manual pump is connected to the first conduit via the third conduit, and a check valve is connected to the third conduit. The conduction direction of the check valve is towards the inlet end of the manual pump. The outlet end of the manual pump is connected to the second conduit via the fourth conduit, and a check valve is connected to the fourth conduit. The conduction direction of the check valve is towards the second conduit.

[0010] Preferably, the anti-fall-off mechanism further includes two pump cylinders symmetrically arranged on both sides of the exterior of the car body, and the two pump cylinders are correspondingly arranged with two locking blocks. A cantilever corresponding to the pump cylinder is fixed on the side wall of the car body. A hinge shaft is fixed at the upper end of the pump cylinder, and the hinge shaft is rotatably connected to the corresponding cantilever. A piston plate is slidably connected inside the pump cylinder, and a sliding rod is fixed on the piston plate. The end of the sliding rod away from the piston plate is connected to the corresponding locking block.

[0011] Preferably, the stopping assembly includes two arc-shaped rods, which are symmetrically arranged on two wheel frames, with the middle part of the arc-shaped rods rotatably connected to the corresponding wheel frame.

[0012] Preferably, one end of the arc-shaped rod is fixed with a stop plug, and the other end is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to one end of the rack, and the rack is slidably connected to the corresponding cantilever. A gear is coaxially fixedly connected to the hinge shaft, and the gear meshes with the corresponding rack.

[0013] Preferably, the clamping mechanism includes two pressure cylinders, which are correspondingly arranged with two pump cylinders. The pressure cylinders are fixed to the car body by support rods. The end of the conduit away from the electric pump is connected to the two pressure cylinders. The pressure cylinders are connected to the pump cylinders by conduit five. A sliding plate two is slidably connected inside the pressure cylinder, and a rack two is fixed on the bottom surface of the sliding plate two. The sliding plate two is connected to the bottom of the pressure cylinder by spring two.

[0014] Preferably, two hangers are fixed at the bottom of the car body, and the two hangers are correspondingly arranged with two top rods. The top rods pass through and are slidably connected to the corresponding hangers. Two sliding grooves are opened on the hangers, and the two sliding grooves are arranged in a straight line and symmetrically located on both sides of the top rod. Toothed grooves are opened on both sides of the top rod. Two toothed plates are symmetrically slidably connected in the two sliding grooves, and teeth are provided on the opposite surfaces of the two toothed plates.

[0015] Preferably, two shaft brackets are symmetrically fixed on the car body, and the two shaft brackets are correspondingly arranged with two hangers. A screw is rotatably connected to the shaft bracket, and a gear is coaxially fixed to one end of the screw. The rack is meshed with the corresponding gear. Two external threads with opposite directions are opened on the peripheral wall of the screw. Lugs are fixed on the gear plate, and the two lugs are respectively threaded to the two external threads on the screw.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In this invention, by setting an anti-fall-off mechanism and a clamping mechanism, the car body is locked on the slide rail to prevent the car body from falling off for maintenance. At the same time, the anti-fall-off mechanism drives the locking component to lock the rollers, further ensuring the locking of the car body. In addition, this application can stop the car pump body to prevent it from falling off when a sudden situation occurs during the operation of the car body, which greatly improves the safety of the elevator system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall assembly cross-section of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the two-section structure of the pump cylinder in this invention;

[0020] Figure 3 This is a side view of the structure of the two toothed plates and the push rod in this invention;

[0021] Figure 4 This is a schematic diagram of the overall assembly cross-section of the present invention. Figure 2 ;

[0022] Figure 5 for Figure 4 A magnified structural diagram at point A in the diagram.

[0023] In the diagram: 1. Car body; 2. Wheel frame; 3. Roller; 4. Pump cylinder one; 5. Partition; 6. Slide plate one; 7. Spring one; 8. Push rod; 9. Hanger; 10. Slide rail; 11. Groove bar; 12. Pump cylinder two; 13. Gear one; 14. Slide rod; 15. Pressure cylinder; 16. Locking block; 17. Rack one; 18. Connecting rod; 19. Arc rod; 20. Stop plug; 21. Cantilever; 22. Manual pump; 23. Trigger switch; 24. 25. Electric pump; 26. Pipe 1; 27. Pipe 2; 28. Pipe 3; 29. ​​Check valve 1; 30. Pipe 4; 31. Check valve 2; 32. Pipe 5; 33. Support rod; 34. Slide plate 2; 35. Rack 2; 36. Spring 2; 37. Shaft bracket; 38. Screw; 39. Gear 2; 40. Lug; 41. Gear plate; 42. Slide groove; 43. Adjusting cylinder; 44. Spring 3; 45. Slide plate 3. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 5 The present invention provides a technical solution: a car-type elevator locking device, comprising a car body 1 and a slide rail 10, wherein a wheel frame 2 is fixed on the car body 1, and a roller 3 is rotatably connected to the wheel frame 2 on a fixed axis, and the roller 3 rolls on the slide rail 10, and further comprising:

[0026] An anti-fall-off mechanism is installed at the bottom of the car body 1 and is used to prevent the car body 1 from falling off.

[0027] The stopping component is mounted on the wheel frame 2 and is used to stop the roller 3. The anti-drop mechanism is connected to the stopping component in a transmission manner.

[0028] The clamping mechanism is located on the side of the car body 1. The clamping mechanism is used to clamp and lock the anti-detachment mechanism, and the clamping mechanism is connected to the anti-detachment mechanism through a pipeline.

[0029] In this embodiment, the anti-fall-off mechanism includes a pump cylinder 4 fixed to the bottom of the car body 1. A partition 5 is fixed to the middle of the inner side of the pump cylinder 4, and the partition 5 divides the interior of the pump cylinder 4 into two identical spaces. An adjusting cylinder 43 is fixed to each of the two end walls of the pump cylinder 4, and the adjusting cylinder 43 is connected to the corresponding space. A sliding plate 45 is slidably connected inside the adjusting cylinder 43, and the sliding plate 45 is connected to one end of the adjusting cylinder 43 through a spring 44. A sliding plate 6 is slidably connected to each of the two spaces, and the sliding plate 6 is connected to the partition 5 through a spring 7. A top rod 8 is fixed on the sliding plate 6, and the top rod 8 passes through and is slidably connected to the end wall of the corresponding pump cylinder 4. A locking block 16 is fixed to the end of the top rod 8 away from the sliding plate 6. A groove 11 is fixed on the slide rail 10, and a protrusion structure corresponding to the groove 11 is opened on the locking block 16. An electric pump 24 is fixed on the upper part of the car body 1, and the inlet end of the electric pump 24 is connected to the two spaces through a conduit 25. The spaces and the regulating cylinder 43 are filled with oil. The outlet end of the electric pump 24 is connected to the clamping mechanism through a conduit 26. A trigger switch 23 is provided inside the car body 1, and the trigger switch 23 is electrically connected to the electric pump 24. After the locking block 16 and the groove 11 are engaged, the electric pump 24 continues to apply suction force to the space. At this time, the slide plate 45 in the regulating cylinder 43 will push the oil in the regulating cylinder 43 into the space so that there is enough oil in the pressure cylinder 15 to generate pressure.

[0030] In this embodiment, a manual pump 22 is provided inside the car body 1. The inlet end of the manual pump 22 is connected to the first conduit 25 through the third conduit 27, and a check valve 28 is connected to the third conduit 27. The conduction direction of the check valve 28 is towards the inlet end of the manual pump 22. The outlet end of the manual pump 22 is connected to the second conduit 26 through the fourth conduit 29, and a check valve 30 is connected to the fourth conduit 29. The conduction direction of the check valve 30 is towards the second conduit 26.

[0031] In this embodiment, the anti-fall-off mechanism also includes two pump cylinders 12 symmetrically arranged on both sides of the exterior of the car body 1, and the two pump cylinders 12 are correspondingly arranged with two locking blocks 16. A cantilever 21 corresponding to the pump cylinder 12 is fixed on the side wall of the car body 1. A hinge shaft is fixed at the upper end of the pump cylinder 12, and the hinge shaft is rotatably connected to the corresponding cantilever 21. A piston plate 31 is slidably connected inside the pump cylinder 12, and a slide rod 14 is fixed on the piston plate 31. The end of the slide rod 14 away from the piston plate 31 is connected to the corresponding locking block 16.

[0032] In this embodiment, the stopping component includes two arc-shaped rods 19, which are symmetrically arranged on two wheel frames 2. The middle part of the arc-shaped rod 19 is rotatably connected to the corresponding wheel frame 2. One end of the arc-shaped rod 19 is fixed with a stop plug 20, and the other end is hinged to one end of a connecting rod 18. The other end of the connecting rod 18 is hinged to one end of a rack 17, and the rack 17 is slidably connected to the corresponding cantilever 21. A gear 13 is coaxially fixedly connected to the hinge shaft, and the gear 13 meshes with the corresponding rack 17.

[0033] In this embodiment, the clamping mechanism includes two pressure cylinders 15, which are correspondingly arranged with two pump cylinders 12. The pressure cylinders 15 are fixed to the car body 1 by support rods 33. The end of the conduit 26 away from the electric pump 24 is connected to the two pressure cylinders 15. The pressure cylinders 15 are connected to the pump cylinders 12 by conduit 32. A sliding plate 34 is slidably connected inside the pressure cylinder 15, and a rack 35 is fixed to the bottom surface of the sliding plate 34. The sliding plate 34 is connected to the bottom of the pressure cylinder 15 by a spring 36. Two hangers 9 are fixed to the bottom of the car body 1, which are correspondingly arranged with two top rods 8. The top rods 8 pass through and are slidably connected to the corresponding hangers 9. Two grooves are provided on the hangers 9. 42, and the two slide grooves 42 are arranged in a straight line and symmetrically located on both sides of the top rod 8. The top rod 8 has toothed grooves on both sides. Two toothed plates 41 are symmetrically slidably connected in the two slide grooves 42. The opposite surfaces of the two toothed plates 41 are provided with teeth. Two shaft brackets 37 are symmetrically fixed on the car body 1. The two shaft brackets 37 are correspondingly arranged with two hangers 9. A screw 38 is rotatably connected to the shaft bracket 37. One end of the screw 38 is coaxially fixedly connected to a gear 39. A rack 35 meshes with the corresponding gear 39. Two external threads with opposite directions are opened on the peripheral wall of the screw 38. Lugs 40 are fixed on the toothed plates 41. The two lugs 40 are respectively threaded to the two external threads on the screw 38.

[0034] Working principle and advantages of this invention: The working process of this elevator car locking device is as follows:

[0035] like Figures 1 to 5As shown, when elevator system maintenance is required, pressing the trigger switch 23 starts the electric pump 24, causing the electric pump 24 to draw oil from the pump cylinder 4 through the first conduit 25 and transport it to the pressure cylinder 15 through the second conduit 26. Then, it is transported to the second pump cylinder 12 through the fifth conduit 32. After the oil in the pump cylinder 4 is drawn out, it is subjected to the force of the spring 7, which causes the slide plate 6 to drive the push rod 8 closer to the slide rail 10. In turn, the push rod 8 drives the locking block 16 closer to the groove 11, and the oil entering the second pump cylinder 12 increases its internal pressure. This causes the piston plate 31 to apply a pushing force to the locking block 16 through the slide rod 14. When the protrusion mechanism on the locking block 16 engages with the groove on the groove 11, the locking block 16 does not... The movement continues, increasing the internal pressure of the pressure cylinder 15. This causes the slide plate 2 34 to move the rack 2 35 downwards. Simultaneously, the slide plate 2 34 compresses the spring 2 36, giving the spring 2 36 a restoring force. As the rack 2 35 moves downwards, it drives the screw 38 to rotate via the gear 2 39. This causes the screw 38 to move the two lugs 40 closer together via two external threads. Consequently, the two lugs 40 move the two toothed plates 41 to slide and move closer together within the groove 42. This causes the teeth on the two toothed plates 41 to engage with the corresponding toothed grooves on the side of the top rod 8, thereby clamping and locking the top rod 8. This ensures that the locking block 16 is securely engaged with the groove 11, preventing the car body 1 from falling off and locking the car body 1.

[0036] As described above, during the process of the locking block 16 approaching the groove bar 11, it drives the pump barrel 12 to rotate upward through the slide rod 14, thereby causing the pump barrel 12 to drive the gear 13 to rotate through the hinge shaft, which in turn causes the gear 13 to drive the rack 17 to move downward. At the same time as the rack 17 moves downward, it applies a pulling force to the end of the arc rod 19 away from the stop plug 20 through the connecting rod 18, thereby causing the arc rod 19 to drive the stop plug 20 to be inserted from the lower side of the corresponding roller 3 between it and the slide rail 10, so that the roller 3 cannot roll, thereby further locking the car body 1.

[0037] After maintenance, the electric pump 24 is started in reverse by trigger switch 23. This causes the electric pump 24 to draw oil from the pressure cylinder 15 through conduit 26 and transport it to the pump cylinder 4 through conduit 25. This reduces the amount of oil in the pressure cylinder 15. Under the action of spring 36, slide plate 34 drives rack 35 to move upward. This causes rack 35 to drive gear 39 and screw 38 to rotate in the opposite direction. As a result, screw 38 drives two lugs 40 away from each other through two external threads. At the same time, the two lugs 40 move away from each other, causing the two toothed plates 41 to move away from each other, thus releasing the lock on the push rod 8. After the oil in the aforementioned space increases, slide plate 6 compresses spring 7 and drives the locking block through push rod 8. As the 16 moves away from the groove 11, the sliding rod 14 of the locking block 16 drives the piston plate 31 to apply a compressive force to the oil in the second pump cylinder 12. This compressive force causes the oil in the second pump cylinder 12 to enter the pressure cylinder 15 through the fifth conduit 32 and be extracted. As the locking block 16 moves away from the groove 11, it drives the second pump cylinder 12 to rotate downward through the sliding rod 14. This causes the second pump cylinder 12 to drive the gear 13 to rotate in the opposite direction through the hinge shaft. This causes the gear 13 to drive the rack 17 to move upward. As the rack 17 moves downward, it applies a thrust to the end of the arc rod 19 away from the stop plug 20 through the connecting rod 18. This causes the arc rod 19 to drive the stop plug 20 away from the corresponding roller 3, releasing the limit on the roller 3 and restoring the normal operation of the car body 1.

[0038] When the electric pump 24 is damaged or loses power, the manual pump 22 is operated to extract the oil in the aforementioned space through the conduit 3 27 and the conduit 1 25, and output it to the pressure cylinder 15 through the conduit 4 29 and the conduit 2 26, thereby manually completing the above-mentioned locking operation of the car body 1. In the event of an emergency, the car body 1 can be stopped in an emergency by the electric pump 24 or the manual pump 22, thereby improving the safety of the elevator system.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A car-type elevator locking device, comprising a car body (1) and a slide rail (10), wherein a wheel frame (2) is fixed on the car body (1), and a roller (3) is rotatably connected to the wheel frame (2) on a fixed axis, and the roller (3) rolls on the slide rail (10), characterized in that: Also includes: An anti-fall mechanism is provided at the bottom of the car body (1) and is used to prevent the car body (1) from falling off. A stop assembly is mounted on the wheel frame (2) and used to stop the roller (3). The anti-drop mechanism is connected to the stop assembly in a transmission manner. The clamping mechanism is located on the side of the car body (1). The clamping mechanism is used to clamp and lock the anti-detachment mechanism, and the clamping mechanism is connected to the anti-detachment mechanism through a pipeline. The anti-fall-off mechanism includes a pump cylinder (4) fixed to the bottom of the car body (1). A partition (5) is fixed to the middle of the inner side of the pump cylinder (4), and the partition (5) divides the interior of the pump cylinder (4) into two identical spaces. An adjusting cylinder (43) is fixed to each of the two end walls of the pump cylinder (4), and the adjusting cylinder (43) is connected to the corresponding space. A sliding plate (45) is slidably connected inside the adjusting cylinder (43), and the sliding plate (45) is connected to the adjusting cylinder (43) by a spring (44). One end is connected to the other end, and two sliding plates (6) are slidably connected in both spaces. The sliding plate (6) is connected to the partition (5) through the spring (7). A top rod (8) is fixed on the sliding plate (6), and the top rod (8) passes through and is slidably connected to the end wall of the corresponding pump cylinder (4). A locking block (16) is fixed on the end of the top rod (8) away from the sliding plate (6). A groove (11) is fixed on the slide rail (10), and a protrusion structure corresponding to the groove (11) is opened on the locking block (16). The anti-fall-off mechanism also includes two pump cylinders (12) symmetrically arranged on both sides of the exterior of the car body (1), and the two pump cylinders (12) are correspondingly arranged with two locking blocks (16). The side wall of the car body (1) is fixed with a cantilever (21) corresponding to the pump cylinder (12). The upper end of the pump cylinder (12) is fixed with a hinge shaft, and the hinge shaft is rotatably connected to the corresponding cantilever (21) with a fixed axis. A piston plate (31) is slidably connected inside the pump cylinder (12), and a slide rod (14) is fixed on the piston plate (31). The end of the slide rod (14) away from the piston plate (31) is connected to the corresponding locking block (16). The stop assembly includes two arc-shaped rods (19), and the two arc-shaped rods (19) are symmetrically arranged on two wheel frames (2). The middle part of the arc-shaped rods (19) is rotatably connected to the corresponding wheel frame (2) with a fixed axis. One end of the arc-shaped rod (19) is fixed with a stop plug (20), and the other end is hinged to one end of the connecting rod (18). The other end of the connecting rod (18) is hinged to one end of the rack (17), and the rack (17) is slidably connected to the corresponding cantilever (21). A gear (13) is coaxially fixedly connected to the hinge shaft, and the gear (13) meshes with the corresponding rack (17).

2. The elevator car locking device according to claim 1, characterized in that: An electric pump (24) is fixed on the upper part of the car body (1), and the inlet end of the electric pump (24) is connected to the two spaces through a conduit (25). The outlet end of the electric pump (24) is connected to the clamping mechanism through a conduit (26). A trigger switch (23) is provided inside the car body (1), and the trigger switch (23) is electrically connected to the electric pump (24).

3. The elevator car locking device according to claim 2, characterized in that: A manual pump (22) is installed inside the car body (1). The inlet end of the manual pump (22) is connected to the first conduit (25) through the third conduit (27). A check valve (28) is connected to the third conduit (27). The conduction direction of the check valve (28) is towards the inlet end of the manual pump (22). The outlet end of the manual pump (22) is connected to the second conduit (26) through the fourth conduit (29). A check valve (30) is connected to the fourth conduit (29). The conduction direction of the check valve (30) is towards the second conduit (26).

4. The elevator car locking device according to claim 3, characterized in that: The clamping mechanism includes two pressure cylinders (15), which are correspondingly arranged with two pump cylinders (12). The pressure cylinders (15) are fixed on the car body (1) by a support rod (33). The end of the conduit (26) away from the electric pump (24) is connected to the two pressure cylinders (15). The pressure cylinders (15) are connected to the pump cylinders (12) by a conduit (32). The inside of the pressure cylinder (15) is slidably connected to a slide plate (34), and a rack (35) is fixed on the bottom surface of the slide plate (34). The slide plate (34) is connected to the bottom of the pressure cylinder (15) by a spring (36).

5. A car-type elevator locking device according to claim 4, characterized in that: The bottom of the car body (1) is fixed with two hangers (9). The two hangers (9) are correspondingly arranged with two top rods (8), and the top rods (8) pass through and are slidably connected to the corresponding hangers (9). Two sliding grooves (42) are opened on the hangers (9), and the two sliding grooves (42) are arranged in a straight line and symmetrically located on both sides of the top rods (8). Toothed grooves are opened on both sides of the top rods (8). Two toothed plates (41) are symmetrically slidably connected in the two sliding grooves (42). The opposite surfaces of the two toothed plates (41) are provided with teeth.

6. The elevator car locking device according to claim 5, characterized in that: Two shaft brackets (37) are symmetrically fixed on the car body (1). The two shaft brackets (37) are correspondingly arranged with two hangers (9). A screw (38) is rotatably connected to the shaft bracket (37). A gear (39) is coaxially fixed to one end of the screw (38). The rack (35) meshes with the corresponding gear (39). Two external threads with opposite directions are opened on the peripheral wall of the screw (38). Lugs (40) are fixed on the tooth plate (41). The two lugs (40) are threaded to the two external threads on the screw (38).

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