Lift car anti-falling device

Abstract

The lift car anti-falling device comprises an anti-falling mechanism and a sliding contact switch, the anti-falling mechanism comprises a shell, a sliding fit block and an iron core assembly, the shell is used for being fixedly installed on a lift car bracket, the sliding fit block is arranged on one side of a guide rail, and the iron core assembly is arranged on the sliding fit block. The sliding wedging block is movably mounted in the shell and is in transmission connection with the iron core assembly, so as to control the locking / loosening between the sliding wedging block and the guide rail under the driving of the iron core assembly; the sliding contact switch is installed on the car door machine, and the sliding contact switch can be driven by the car door machine to control power-on / power-off of the iron core assembly. Therefore, the lift car can be stopped in time when falling at the leveling position so as to ensure the safety when passengers enter and exit from the lift car, on one hand, the response speed is high, dangers can be prevented in advance, and on the other hand, the lift car anti-falling device can be suitable for an existing lift structure and is safe, simple, convenient and fast. And the effects of reducing the installation cost and the installation time are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to elevator anti-fall protection, and in particular relates to a car anti-fall device and an elevator. Background Art

[0002] In modern buildings, elevators are widely used in various places as an important vertical transportation tool. However, when the elevator is leveled, there is always a potential risk of the car falling when passengers enter and exit the elevator.

[0003] Traditional elevator systems mainly rely on traction machines, wire ropes and other components to ensure the normal operation and fixed position of the car. However, as the elevator is used for a long time, the parts wear and tear, and sudden failures may occur, it may lead to serious problems such as insufficient traction mechanism power or wire rope breakage, which may cause the car to fall. If this situation occurs when the elevator is at the level position and the door is open to let passengers in and out, it will cause extremely serious personal injury accidents. Although there are some safety devices such as speed limiters and safety clamps in the existing elevator system, most of these devices respond passively after the accident has occurred, and it is difficult to completely eliminate the possibility of the car falling. In actual situations, there are still many situations where safety measures cannot be triggered due to failures. Therefore, it is extremely important to have a protective measure that can actively prevent the car from moving. Utility Model Content

[0004] In view of this, it is necessary to provide a car anti-falling device that can actively prevent the car from moving.

[0005] A car anti-falling device, the car anti-falling device comprising:

[0006] The anti-fall mechanism comprises a shell, a sliding engagement block and an iron core assembly, wherein the shell is used to be fixedly mounted on the car bracket, the sliding engagement block is arranged on one side of the guide rail, and the sliding engagement block is movably mounted in the shell and is transmission-connected with the iron core assembly to control the locking / relaxation between the sliding engagement block and the guide rail under the drive of the iron core assembly;

[0007] The sliding contact switch is installed on the car door machine, and the sliding contact switch can control the power on / off of the iron core component under the drive of the car door machine.

[0008] It can be understood that the action of the anti-fall mechanism is controlled by the car door machine, so that the car can stop in time when it falls at the level position, so as to ensure the safety of passengers entering and exiting the car. On the one hand, this has a fast response speed and can prevent the occurrence of danger in advance. On the other hand, the car anti-fall device can be applied to the structure of existing elevators, which is safe, simple and fast, and has the effect of reducing installation costs and installation time.

[0009] In one embodiment, in the height direction of the guide rail, there is a position interference portion between the housing and the sliding fitting block. The sliding fitting block is configured to abut against the guide rail in response to the pushing of the position interference portion, and lock the sliding fitting block and the guide rail together.

[0010] It can be understood that by using the position interference portion between the housing and the sliding fitting block, the housing can provide support for the sliding fitting block when locking the guide rail, thus ensuring the position stability between the two when the sliding fitting block locks the guide rail.

[0011] In one embodiment, a first inclined surface is formed on the housing, and a second inclined surface is formed on the sliding fitting block. In the height direction of the guide rail, the second inclined surface abuts against the first inclined surface to form the position interference portion.

[0012] It can be understood that by using the abutment between the two inclined surfaces, the housing can support the sliding fitting when locking the guide rail, which can simplify the structure while ensuring the position stability between the sliding fitting block and the guide rail when locking the guide rail.

[0013] In one embodiment, a gap is formed between the housing and the guide rail. When the sliding fitting block moves downward along the height direction of the guide rail, it can be squeezed into the gap so that the sliding fitting block locks the guide rail.

[0014] Wherein, the sliding fitting block has a rough surface, the rough surface faces the guide rail, and the sliding fitting block can abut against the guide rail through the rough surface.

[0015] It can be understood that by using the structural characteristics of the rough surface, the frictional resistance between the sliding fitting block and the guide rail when locking the guide rail can be increased, preventing slipping, and ensuring the position stability between the two when the sliding fitting block locks the guide rail.

[0016] In one embodiment, the iron core assembly includes an electromagnet and a first elastic member. The first elastic member is abutted against the sliding fitting block in a pre-compressed manner for driving the sliding fitting block to abut against the guide rail.

[0017] When the electromagnet is energized, it can adsorb the sliding fitting block, so that the sliding fitting block compresses the first elastic member to move and the sliding fitting block disengages from the guide rail.

[0018] In one embodiment, the number of the sliding fitting blocks is configured to be multiple, and the multiple sliding fitting blocks are arranged at intervals in sequence along the circumferential direction of the guide rail. Moreover, the multiple sliding fitting blocks can simultaneously move towards the direction close to the guide rail to form a locking and fitting structure for clamping the guide rail and lock with the guide rail.

[0019] It can be understood that using multiple sliding fitting blocks to lock the guide rail simultaneously can ensure that the car can stop in time when it drops at the leveling position.

[0020] In one embodiment, the sliding contact switch includes a sliding telescopic rod, and the sliding telescopic rod is installed on the car door machine in a liftable manner. Moreover, the lifting of the sliding telescopic rod can be controlled by the opening and closing of two car door panels on the car door machine to control the energization / de-energization of the iron core assembly.

[0021] It can be understood that using the opening and closing of two car door panels to control the lifting of the sliding telescopic rod to achieve the purpose of controlling the energization / de-energization of the iron core assembly enables the car anti-falling device to perform the operation of stopping the car before the two car door panels are completely closed, which can further ensure the safety of passengers when entering and leaving the car.

[0022] In one embodiment, the sliding contact switch further includes a first conductive sheet, a second conductive sheet, and a third conductive sheet. The second conductive sheet is installed on the sliding telescopic rod, and the second conductive sheet can respectively contact the first conductive sheet and the third conductive sheet under the drive of the sliding telescopic rod to energize the iron core assembly.

[0023] It can be understood that using the lifting of the second conductive sheet driven by the sliding telescopic rod to control the contact between the second conductive sheet and the first conductive sheet and the third conductive sheet to achieve the purpose of controlling the energization / de-energization of the iron core assembly can meet the use requirement of controlling the energization and de-energization of the iron core assembly with the sliding contact switch.

[0024] In one embodiment, the sliding contact switch further includes a partition plate and a second elastic member. The second elastic member is sleeved on the sliding telescopic rod in a pre-compressed manner and abuts against the partition plate for driving the sliding telescopic rod to descend;

[0025] Wherein, the partition plate is fixedly installed in the car door machine.

[0026] It can be understood that using the elastic push of the second elastic member on the sliding telescopic rod can meet the use requirement of the sliding telescopic rod for lifting under the control of the opening and closing of two car door panels.

[0027] In one embodiment, the sliding telescopic rod has a bevel groove, and when the two car door panels are closed, they can push against the bevel groove to drive the sliding telescopic rod to rise and control the energization of the iron core assembly.

[0028] It can be understood that, by using the structural setting of the bevel groove on the sliding telescopic rod, the two car door panels can push the sliding telescopic rod to rise through the bevel groove, which is convenient for the use requirement of the two car door panels to control the rise of the sliding telescopic rod.

[0029] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0030] The car anti-falling device claimed in the present application controls the action of the anti-falling mechanism through the car door machine, so that when the car drops at the leveling position, it can stop in time to ensure the safety of passengers when entering and leaving the car. On the one hand, it has a fast response speed and can prevent danger in advance. On the other hand, the car anti-falling device can be applied to the structure of existing elevators, which is safe, simple and fast, and has the effect of reducing the installation cost and installation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of the anti-falling mechanism provided by an embodiment of the present application when it is released from the guide rail.

[0033] Figure 2 It is a schematic structural diagram of the anti-falling mechanism provided by an embodiment of the present application when it is locked with the guide rail.

[0034] Figure 3 It is a schematic structural diagram of the sliding contact switch provided by an embodiment of the present application when it is assembled on the car door machine, wherein the car door panel is in the open state.

[0035] Figure 4 For Figure 3 the structural diagram of the sliding contact switch.

[0036] Figure 5 It is a schematic structural diagram of the sliding contact switch provided by an embodiment of the present application when it is assembled on the car door machine, wherein the car door panel is in the closed state.

[0037] Figure 6 For Figure 5Schematic structural diagram of the sliding contact switch.

[0038] Reference numerals: 10, anti-falling mechanism; 11, housing; 111, first inclined surface; 12, sliding fitting block; 121, second inclined surface; 122, rough surface; 13, iron core assembly; 131, electromagnet; 132, first elastic member; 133, coil; 20, sliding contact switch; 20, sliding contact switch; 21, sliding telescopic rod; 211, bevel groove; 212, convex platform; 22, first conductive sheet; 23, second conductive sheet; 24, third conductive sheet; 25, partition; 26, second elastic member; 101, position interference portion; 102, gap; 200, guide rail; 300, car door machine; 310, car door panel; 320, sliding groove; 330, connection structure; 340, synchronous belt. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that when an element is referred to as being "provided on" another element, it can be directly provided on the other element or there may also be an intermediate element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there may be an intermediate element at the same time. When an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there may be an intermediate element at the same time.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] The car anti-falling device claimed in this application is applied to an elevator, and specifically provides anti-falling protection for the car at the leveling position.

[0043] Such as Figures 1 to 6As shown, the car anti-fall device provided by one embodiment of the present application includes an anti-fall mechanism 10 and a sliding contact switch 20. The anti-fall mechanism 10 includes a housing 11, a sliding engagement block 12 and an iron core assembly 13. The housing 11 is used to be fixedly installed on a car bracket (not shown in the figure), and the sliding engagement block 12 is arranged on one side of the guide rail 200. In addition, the sliding engagement block 12 is movably installed in the housing 11 and is transmission-connected with the iron core assembly 13 to control the locking / relaxation between the sliding engagement block 12 and the guide rail 200 under the drive of the iron core assembly 13; the sliding contact switch 20 is installed on the car door machine 300, and the sliding contact switch 20 can control the power on / off of the iron core assembly 13 under the drive of the car door machine 300. In other words, the car anti-fall device can use the car door machine 300 to protect the car from falling. Here, the guide rail 200 is a car guide rail or a counterweight guide rail. It should be noted that the above-mentioned car bracket is a conventional structure of existing elevators and is used to carry the car.

[0044] It can be understood that the action of the anti-fall mechanism 10 is controlled by the car door machine 300, so that the car can stop in time when it falls at the level position, so as to ensure the safety of passengers when entering and exiting the car. On the one hand, this has a fast response speed and can prevent the occurrence of danger in advance. On the other hand, the car anti-fall device can be applied to the structure of existing elevators, which is safe, simple and fast, and has the effect of reducing installation costs and installation time.

[0045] like Figure 2 As shown, in the height direction of the guide rail 200, there is a position interference portion 101 between the housing 11 and the sliding engagement block 12, and the sliding engagement block 12 is configured to abut against the guide rail 200 in response to the push of the position interference portion 101, and the sliding engagement block 12 and the guide rail 200 are locked. In other words, the housing 11 can provide support for the sliding engagement block 12 when locking the guide rail 200, so as to ensure the stability of the position between the two when the sliding engagement block 12 locks the guide rail 200, that is, when the sliding engagement block 12 locks the guide rail 200, the car bracket, the housing 11, the sliding engagement block 12 and the guide rail 200 are fixed to each other, and the car is parked on the guide rail 200.

[0046] like Figure 1As shown, a first inclined surface 111 is formed on the housing 11, and a second inclined surface 121 is formed on the sliding fitting block 12. In the height direction of the guide rail 200, the second inclined surface 121 abuts against the first inclined surface 111 and forms a position interference portion 101, so that when the first inclined surface 111 on the housing 11 abuts against the second inclined surface 121 on the sliding fitting block 12, the housing 11 can provide an obliquely downward supporting force to the sliding fitting block 12 and realize the support when the sliding fitting block 12 locks the guide rail 200. In this way, on the basis of ensuring the position stability between the sliding fitting block 12 and the guide rail 200 when the sliding fitting block 12 locks the guide rail 200, the structure can be simplified. It should be noted that the first inclined surface 111 and the second inclined surface 121 are arranged in parallel. Among them, the inclination angle of the first inclined surface 111 can be specifically set according to the use requirements and will not be elaborated here.

[0047] As Figure 1 、 Figure 2 shown, a gap 102 is formed between the housing 11 and the guide rail 200. When the sliding fitting block moves downward along the height direction of the guide rail 200, it can be squeezed into the gap 102 so that the sliding fitting block 12 locks the guide rail 200. Among them, the sliding fitting block 12 has a rough surface 122, and the rough surface 122 faces the guide rail 200, and the sliding fitting block 12 can abut against the guide rail 200 through the rough surface 122. Here, the housing 11 pushes the second inclined surface 121 on the sliding fitting block 12 with the first inclined surface 111, so that the sliding fitting block 12 is squeezed into the gap 102 to clamp the guide rail 200, thereby locking the guide rail 200 and the sliding fitting block 12 so that the two no longer move relative to each other. In this way, by using the structural characteristics of the rough surface 122, the frictional resistance between the sliding fitting block 12 and the guide rail 200 when the sliding fitting block 12 locks the guide rail 200 can be increased, preventing slipping, and ensuring the position stability between the sliding fitting block 12 and the guide rail 200 when the sliding fitting block 12 locks the guide rail 200. It should be noted that the shape of the above-mentioned rough surface 122 can specifically be serrated, wavy, or other irregular shapes.

[0048] Preferably, as Figure 1 、 Figure 2As shown, the number of sliding fitting blocks 12 is configured to be multiple, and the multiple sliding fitting blocks 12 are arranged at intervals in sequence along the circumferential direction of the guide rail 200. Moreover, the multiple sliding fitting blocks 12 can move towards the direction close to the guide rail 200 simultaneously to form a locking and matching structure for clamping the guide rail 200. That is to say, when the anti-falling mechanism 10 locks the car bracket to the guide rail 200, there are multiple sliding fitting blocks 12 to provide the locking force simultaneously, so as to ensure that the car can stop in time when it drops at the leveling position. Here, the number of sliding fitting blocks 12 is configured to be two, and the two sliding fitting blocks 12 are symmetrically arranged on both sides of the guide rail 200. Moreover, a core component 13 is respectively arranged between the shells 11 corresponding to each sliding fitting block 12. Of course, in other embodiments, the number of sliding fitting blocks 12 can also be three, four, or even more.

[0049] As Figure 1 , Figure 2 shown, the core component 13 includes an electromagnet 131 and a first elastic member 132. The first elastic member 132 abuts against the sliding fitting block 12 in a pre-compressed manner, and is used to drive the sliding fitting block 12 to abut against the guide rail 200 or to drive the sliding fitting block 12 to move towards the direction close to the guide rail 200; when the electromagnet 131 is energized, it can adsorb the sliding fitting block 12, so that the sliding fitting block 12 compresses the first elastic member 132 to move, and the sliding fitting block 12 is separated from the guide rail 200. Here, the sliding fitting block 12 is made of iron block or other ferromagnetic metals; the first elastic member 132 is configured as a spring, a rubber sleeve, or other highly elastic fittings. It should be noted that a coil 133 is wound around the electromagnet 131, and when the coil 133 is energized, it can generate a strong magnetic field and realize the adsorption of the sliding fitting block 12.

[0050] As can be seen from the above, when the core component 13 is powered off, the sliding fitting block 12 can abut against the guide rail 200 under the elastic push of the first elastic member 132, and generate a frictional force between the rough surface 122 on the sliding fitting block 12 and the guide rail 200. In this way, when the car drops due to certain reasons, it can prevent or delay the sliding of the sliding fitting block 12 on the guide rail 200 until the second inclined surface 121 on the sliding fitting block 12 fits with the first inclined surface 111 on the shell 11, and finally realizes the locking of the car on the guide rail 200; when the core component 13 is powered on, the electromagnet 131 can adsorb the sliding fitting block 12, so that the sliding fitting block 12 is separated from the guide rail 200, and unlocks the locking of the car on the guide rail 200, so that the car can normally move up and down in the elevator shaft.

[0051] As Figures 3 to 6As shown, the sliding contact switch 20 includes a sliding telescopic rod 21, which is installed on the car door machine 300 in a lifting manner, and the lifting and lowering of the sliding telescopic rod 21 can be controlled by the opening and closing of the two car door panels 310 on the car door machine 300, so as to control the power on / off of the iron core assembly 13, and achieve the control of the locking / release of the guide rail 200 by the sliding engagement block 12. That is to say, when the car anti-falling device is used in an elevator, the opening and closing of the two car door panels 310 can be used to control the lifting and lowering of the sliding telescopic rod 21, so as to achieve the purpose of controlling the power on / off of the iron core assembly 13, so that the car anti-falling device can play the role of parking the car before the two car door panels 310 are not completely closed, which can further ensure the safety of passengers when entering and exiting the car. It should be noted that the car door panel 310 is slidably installed in the slide groove 320 of the car door machine 300, and is connected to the synchronous belt 340 through the connection structure 330. The connection structure 330 includes a car door hanging plate and a synchronous belt clamp. When the car door panel 310 moves, the door motor drives the synchronous belt 340 to rotate forward and reverse to control the opening and closing of the car door panel 310. Of course, in other embodiments, the synchronous belt 340 can also be used to control the power on / off of the core assembly 13.

[0052] As preferably, Figure 4 , Figure 6 As shown, the sliding telescopic rod 21 has a groove 211, and the two car door panels 310 can push the groove 211 when closing to drive the sliding telescopic rod 21 to rise, and control the iron core assembly 13 to be energized, so that the sliding engagement block 12 is retracted and the clamping and locking of the guide rail 200 is released. In other words, the two car door panels 310 can push the sliding telescopic rod 21 to rise through the groove 211, which can facilitate the use of the two car door panels 310 to control the rise of the sliding telescopic rod 21.

[0053] like Figure 4 , Figure 6As shown, the sliding contact switch 20 further includes a first conductive sheet 22, a second conductive sheet 23, and a third conductive sheet 24. The second conductive sheet 23 is mounted on the sliding telescopic rod 21, and the second conductive sheet 23 can contact the first conductive sheet 22 and the third conductive sheet 24 respectively under the drive of the sliding telescopic rod 21 to energize the iron core assembly 13. That is to say, the sliding contact switch 20 can use the lifting and lowering of the second conductive sheet 23 driven by the sliding telescopic rod 21 to control whether the second conductive sheet 23 contacts the first conductive sheet 22 and the third conductive sheet 24, so as to achieve the purpose of controlling the energization / de-energization of the iron core assembly 13, thus meeting the use requirement of controlling the energization and de-energization of the iron core assembly 13 with the sliding contact switch 20. Here, the first conductive sheet 22 and the third conductive sheet 24 are electrically connected to the coil 133 in the iron core assembly 13. In this way, when the first conductive sheet 22 contacts the third conductive sheet 24 through the second conductive sheet 23, the coil 133 can be energized and generate a magnetic field capable of attracting the sliding engagement block 12.

[0054] As Figure 4 , Figure 6 As shown, the sliding contact switch 20 further includes a partition 25 and a second elastic member 26. The partition 25 is fixedly installed in the car door machine 300. The second elastic member 26 is sleeved on the sliding telescopic rod 21 in a pre-compressed manner and abuts against the partition 25, and is used to drive the sliding telescopic rod 21 to descend, so as to meet the use requirement of the sliding telescopic rod 21 for lifting and lowering under the control of the opening and closing of the two car door panels 310. Here, the second elastic member 26 is configured as a spring, a rubber sleeve, or other accessories with high elasticity. It should be noted that the sliding telescopic rod 21 of the present application further has a convex platform 212, and one end of the second elastic member 26 away from the partition 25 abuts against the convex platform 212, so that the pre-compressed second elastic member 26 can drive the sliding telescopic rod 21 to move downward.

[0055] As can be seen from the above, when the elevator equipped with the car anti-falling device is working, when the elevator car is leveled, the car door panel 310 opens to both sides, triggering the sliding contact switch 20 to act. The sliding telescopic rod 21 slides downward under the action of the second elastic member 26, driving the second conductive sheet 23 to separate from the first conductive sheet 22 and the third conductive sheet 24, disconnecting the electrical circuit. The electromagnet 131 loses power and does not generate an electromagnetic field. At this time, the sliding fitting block 12 approaches the guide rail 200 under the pushing of the first elastic member 132, and the rough surface 122 on the sliding fitting block 12 lightly touches the guide rail 200. When the car door panel 310 is closed, the car door panel 310 jacks up the sliding telescopic rod 21, driving the sliding telescopic rod 21 to drive the second conductive sheet 23 to contact the first conductive sheet 22 and the third conductive sheet 24, connecting the electrical circuit. The electromagnet 131 is energized to generate an electromagnetic field, and the sliding fitting block 12 is adsorbed on the electromagnet 131, and the elevator runs normally. However, when the elevator car or the counterweight is displaced, the sliding fitting block 12 can move upward relative to the guide rail 200 driven by the friction force between the rough surface 122 and the guide rail 200. The pushing of the housing 11 on the sliding fitting block 12 can clamp the guide rail 200 to ensure that the elevator car stops and guarantee the safety of passengers. After the car anti-falling device is used, the maintenance personnel can reset the sliding fitting block 12. It should be noted that the car anti-falling device of the present application can also be installed on the counterweight side to prevent the elevator counterweight from falling.

[0056] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0057] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as it is within the scope of the essential spirit of the present invention, appropriate changes and variations made to the above embodiments fall within the scope of protection required by the present invention.

Claims

1. A car anti-fall device, characterized in that: The car anti-fall device includes: The anti-fall mechanism (10) comprises a shell (11), a sliding engagement block (12) and an iron core assembly (13), wherein the shell (11) is used to be fixedly mounted on a car bracket, the sliding engagement block (12) is arranged on one side of a guide rail (200), and the sliding engagement block (12) is movably mounted in the shell (11) and is transmission-connected to the iron core assembly (13) so as to control the locking / loosening between the sliding engagement block (12) and the guide rail (200) under the drive of the iron core assembly (13); The sliding contact switch (20) is installed on the car door machine (300), and the sliding contact switch (20) can control the power on / off of the iron core component (13) under the drive of the car door machine (300).

2. The car anti-fall device according to claim 1, characterized in that: In the height direction of the guide rail (200), a position interference portion (101) is provided between the shell (11) and the sliding engagement block (12), and the sliding engagement block (12) is configured to abut against the guide rail (200) in response to the pushing of the position interference portion (101), and to lock the sliding engagement block (12) and the guide rail (200).

3. The car anti-falling device according to claim 2, characterized in that: A first inclined surface (111) is formed on the shell (11), and a second inclined surface (121) is formed on the sliding engagement block (12); in the height direction of the guide rail (200), the second inclined surface (121) is in contact with the first inclined surface (111) and forms the position interference portion (101).

4. The car anti-fall device according to claim 1, characterized in that: A gap (102) is formed between the housing (11) and the guide rail (200), and the sliding engagement block (12) can be squeezed into the gap (102) when descending along the height direction of the guide rail (200), so that the sliding engagement block (12) locks the guide rail (200); The sliding engagement block (12) has a rough surface (122), the rough surface (122) is arranged facing the guide rail (200), and the sliding engagement block (12) abuts against the guide rail (200) via the rough surface (122).

5. The car anti-fall device according to claim 1, characterized in that: The iron core assembly (13) comprises an electromagnet (131) and a first elastic member (132), wherein the first elastic member (132) abuts against the sliding engagement block (12) in a pre-compressed manner, and is used to drive the sliding engagement block (12) to abut against the guide rail (200); When the electromagnet (131) is energized, it can absorb the sliding engagement block (12), so that the sliding engagement block (12) compresses the first elastic member (132) to move, and the sliding engagement block (12) is separated from the guide rail (200).

6. The car anti-falling device according to any one of claims 1 to 5, characterized in that: The number of the sliding engaging blocks (12) is configured to be multiple, and the multiple sliding engaging blocks (12) are arranged in sequence and spaced apart along the circumferential direction of the guide rail (200), and the multiple sliding engaging blocks (12) can simultaneously move in a direction close to the guide rail (200) to form a locking fitting structure for clamping the guide rail (200).

7. The car anti-fall device according to claim 1, characterized in that: The sliding contact switch (20) comprises a sliding telescopic rod (21), the sliding telescopic rod (21) being mounted on the car door machine (300) in a liftable manner, and the lifting and lowering of the sliding telescopic rod (21) can be controlled by opening and closing two car door panels (310) on the car door machine (300) to control the power on / off of the iron core assembly (13).

8. The car anti-falling device according to claim 7, characterized in that: The sliding contact switch (20) further comprises a first conductive sheet (22), a second conductive sheet (23) and a third conductive sheet (24); the second conductive sheet (23) is mounted on the sliding telescopic rod (21), and the second conductive sheet (23) can be driven by the sliding telescopic rod (21) to contact the first conductive sheet (22) and the third conductive sheet (24) respectively, and energize the iron core assembly (13).

9. The car anti-falling device according to claim 7, characterized in that: The sliding contact switch (20) further comprises a partition (25) and a second elastic member (26), wherein the second elastic member (26) is mounted on the sliding telescopic rod (21) in a pre-compressed manner and abuts against the partition (25) to drive the sliding telescopic rod (21) to descend; Wherein, the partition plate (25) is fixedly installed in the car door machine (300).

10. The car anti-falling device according to claim 7, characterized in that: The sliding telescopic rod (21) has a groove (211), and the two car door panels (310) can push the groove (211) when closing to drive the sliding telescopic rod (21) to rise and control the iron core assembly (13) to be energized.

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