Safe anti-falling device of elevator

Abstract

The invention belongs to the technical field of lifting equipment, and relates to a lift safety anti-falling device which comprises a safety stand column, a lifting mechanism, an anti-falling mechanism and an induction control mechanism. The safety upright post is provided with a safety hole site; the lifting mechanism comprises a first driving part, a first transmission part and a lifting seat, the first driving part is installed on the safety stand column, and the first driving part is in transmission connection with the lifting seat through the first transmission part; an avoiding hole is formed in the lifting seat; the anti-falling mechanism comprises a mounting base, a second driving piece, a second transmission piece, two safety pins and a limiting piece, the mounting base is fixed to the lifting base, the second driving piece is connected with the second transmission piece, the second transmission piece is rotationally connected with the two safety pins, and the limiting piece is mounted on the mounting base and movably connected with the two safety pins; the inductive control mechanism comprises a controller; and when the first transmission piece is broken and / or the first driving piece is powered off, the controller is triggered to control the anti-falling mechanism, so that at least one safety pin is inserted into one safety hole site, and reliable anti-falling is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting equipment, and specifically discloses a safety anti-falling device of an elevator. BACKGROUND

[0002] At present, when the elevator suddenly loses power or gas during lifting or the lifting mechanism malfunctions, the elevator will quickly fall downward, which poses a great safety hazard. In order to solve the safety hazard, an anti-falling mechanism is generally designed on the elevator. However, the existing anti-falling mechanism is designed with a single safety pin. If the anti-falling mechanism extends the safety pin and the single safety pin is not in the safety hole position, the elevator cannot immediately stop falling safely, which poses a safety hazard. SUMMARY

[0003] The present application aims to provide a safety anti-falling device of an elevator, which can achieve reliable anti-falling.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] The present application provides a safety anti-falling device of an elevator, which comprises:

[0006] A safety column is provided, which is spaced apart along a vertical direction and has a plurality of safety hole positions. The depth of the safety hole position extends along a first direction perpendicular to the vertical direction.

[0007] A lifting mechanism is provided, which comprises a first driving member, a first transmission member, and a lifting seat. The first driving member is installed on the safety column, and the first driving member is in transmission connection with the lifting seat through the first transmission member. The lifting seat is located on one side of the safety column along the first direction. The lifting seat is provided with an avoidance hole along the first direction, and the avoidance hole is opposite to the area of the safety column provided with the safety hole position.

[0008] An anti-falling mechanism is provided, which comprises a mounting seat, a second driving member, a second transmission member, two safety pins, and a limiting member. The mounting seat is fixed on the lifting seat. The second driving member is installed on the mounting seat and connected with the second transmission member. The second transmission member is in rotational connection with the two safety pins. The limiting member is installed on the mounting seat and in movable connection with the two safety pins to limit the rotational angle of the safety pins.

[0009] The inductive control mechanism comprises a controller and a first inductor connected with the controller for detecting whether the first transmission member is broken; when the first transmission member is broken and / or the first driving member is powered off, the controller is triggered to control the anti-falling mechanism to start: the second driving member drives the second transmission member to move the safety pin along the first direction while rotating relative to the second transmission member, and the limiting member limits the rotation angle of the safety pin, so that at least one safety pin can be inserted into one of the safety hole positions.

[0010] As one of the preferred solutions of the elevator safety anti-falling device, the second transmission member comprises a connecting column, a connecting rod, a first hinged shaft and a second hinged shaft, one end of the connecting column is connected with the output shaft of the second driving member, the other end of the connecting column away from the second driving member is provided with a first mounting groove penetrating the outer wall of the connecting column, the connecting rod is arranged in the first mounting groove and is hinged with the connecting column through the first hinged shaft, the axis of the first hinged shaft extends along the second direction, and the connecting rod can rotate around the first hinged shaft; the safety pin away from the safety column is provided with a second mounting groove penetrating the outer wall of the safety pin, the two ends of the connecting rod along the length direction correspond to the second mounting grooves of the two safety pins, the end of the connecting rod is inserted into the corresponding second mounting groove and is hinged with the corresponding safety pin through the second hinged shaft, the axis of the second hinged shaft extends along the second direction, and the connecting rod and the safety pin can rotate around the corresponding second hinged shaft; the first direction, the second direction and the vertical direction are perpendicular to each other.

[0011] As one of the preferred solutions of the elevator safety anti-falling device, the limiting member comprises two limiting seats arranged on the mounting seat along the first direction, the limiting seat is provided with a limiting hole corresponding to the two safety pins, and the limiting hole has a rotation gap with the safety pin.

[0012] As one of the preferred solutions of the elevator safety anti-falling device, the anti-falling mechanism further comprises a second inductor, a first inductive plate and a bolt, the second inductor is installed on the mounting seat and connected with the controller, and the first inductive plate is further connected with the connecting column through the bolt, the second driving member can drive the connecting column to drive the first inductive plate and the safety pin to move synchronously along the first direction, when the anti-falling mechanism is closed, the first inductive plate is located in the detection position of the second inductor, that is, the first inductive plate faces the second inductor.

[0013] As a preferred embodiment of the safety anti-fall device for the elevator, the first sensing plate includes a first plate, a second plate, and a third plate connected vertically in sequence. The length of the first plate extends along the first direction, the length of the second plate extends along the vertical direction, and the length of the third plate extends along the second direction and is located on one side of the second sensor along the vertical direction. When the anti-fall mechanism is closed, the third plate is located at the detection position of the second sensor, that is, the third plate is directly facing the second sensor; the first plate is connected to the device by the bolt.

[0014] As one preferred embodiment of the safety anti-fall device for the elevator, the first plate is hinged to the first hinge shaft; and / or, the limiting seat has a through hole for the first plate to pass through, and the first plate passes through the through hole.

[0015] As a preferred embodiment of the safety anti-fall device for the elevator, the second driving component includes a spring cylinder and a solenoid valve connected to the controller. The spring cylinder is connected to an air source via a connecting pipe, and the solenoid valve is installed on the connecting pipe to control the air supply to the spring cylinder. When the first transmission component breaks and / or the first driving component is de-energized, the controller controls the solenoid valve to close, causing the spring cylinder to shut off its air supply. The output shaft of the spring cylinder moves toward the safety column, so that at least one of the safety pins is inserted into one of the safety holes.

[0016] As a preferred embodiment of the safety anti-fall device for the elevator, the first transmission component includes a transmission part and an elastic connecting part, and the first driving component is connected to the transmission part; the lifting seat includes a seat plate and a first end plate, the first end plate is fixed to the upper end of the seat plate, the transmission part passes through the first end plate and is connected to the elastic connecting part, the elastic connecting part elastically abuts against the lower surface of the first end plate, and the first sensor is disposed on the side of the seat plate away from the safety column. When the transmission part breaks, the elastic connecting part is located at the detection position of the first sensor, and the first sensor triggers the controller to control the anti-fall mechanism to start.

[0017] As a preferred embodiment of the safety anti-fall device for a lifting platform, the transmission part includes a chain and two chain seats. The elastic connection part includes a spring seat, a spring, a guide rod, and a second sensing plate. The guide rod passes through the first end plate and is connected to one end of the chain via the chain seat. The lifting platform also includes a second end plate fixed to the lower end of the platform. The other end of the chain is connected to the second end plate via another chain seat. The first driving member is connected to the chain drive. The spring seat is fixed on the guide rod. The second sensing plate is fixed to the end of the spring seat facing the first end plate. The spring is sleeved on the guide rod. One end of the spring in the length direction abuts against the first end plate, and the other end passes through the second sensing plate and extends into the limiting groove of the spring seat. The length of the second sensing plate extends along the second direction between the first sensor and the first end plate. When the transmission part breaks, the spring drives the spring seat to move the second sensing plate vertically until it contacts the first sensor. The first sensor triggers the controller to activate the anti-fall mechanism. The first direction, the second direction, and the vertical direction are perpendicular to each other.

[0018] As a preferred embodiment of the safety anti-fall device for the elevator, the safety column includes a column body and a safety plate. The column body has a groove on the side facing the lifting seat, and the safety plate is fixed to the groove opening. The safety hole penetrates the safety plate along the first direction. The first driving component includes a motor and two gears meshing with the chain. The motor is fixed to the end of the column body and is connected to the gears for transmission. The safety plate has through holes at its two ends in the vertical direction for the chain to pass through. The chain passes through the groove and the corresponding through hole. One end of the chain is connected to the upper end of the lifting seat, and the other end is connected to the lower end of the lifting seat.

[0019] The beneficial effects of this invention are:

[0020] In this invention, the first driving component drives the lifting seat to run smoothly in the vertical direction via the first transmission component. When the fall protection mechanism is not working, the safety pin does not contact the safety column. When the first transmission component breaks and / or the first driving component is de-energized, the controller instantly activates the second driving component of the fall protection mechanism based on the signal. The second driving component pushes the two safety pins toward the safety column (first direction) via the second transmission component. During this process, the safety pins simultaneously generate two movements: one is movement along the first direction, and the other is rotation relative to the second transmission component. When the two safety pins are aligned with a safety hole, the two safety pins will not encounter resistance during their movement along the first direction until they are inserted into the safety hole. When only one safety pin is aligned with a safety hole, the aligned safety pin is inserted into the safety hole, while the other safety pin is blocked by the gap between the two safety holes during its movement along the first direction. At this time, both safety pins rotate slightly relative to the second transmission component. Under the action of the limiting component, the rotation angle of the safety pin is small, and the safety pin aligned with the safety hole can still be inserted into the safety hole after rotation. In this embodiment, when the second driving member drives the two safety pins to move toward the safety column through the second transmission member, at least one safety pin will always be inserted into one of the safety holes, ensuring that the anti-fall mechanism can provide anti-fall protection for the lifting structure when the lifting mechanism descends uncontrollably, so as to ensure the safety of the lifting mechanism.

[0021] Compared with existing technologies, the elevator safety anti-fall device of this invention requires no manual intervention, automatically detects faults, and automatically executes protection. Whether it's a mechanical fault like "breakage of the first transmission component" or an electrical fault like "power failure of the first drive component," protection can be triggered, covering the main fault modes. Relying on the mechanical method of inserting safety pins into safety holes, combined with spaced safety holes, it ensures rapid and accurate locking and anti-fall at any height, rather than friction or electrical braking, resulting in extremely high reliability. Using two safety pins, even if one safety pin fails to activate, the other safety pin can still lock and prevent fall, meaning at least one safety pin will always be inserted into one of the safety holes, improving the safety of the elevator safety anti-fall device. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the elevator safety anti-fall device in one embodiment;

[0023] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0024] Figure 3 This is a schematic diagram of the fall protection mechanism in one embodiment;

[0025] Figure 4This is a schematic diagram of the fall protection mechanism (excluding the protective cover) in one embodiment;

[0026] Figure 5 This is a schematic diagram of the connection structure between the second transmission component and the safety pin in one embodiment;

[0027] Figure 6 This is a schematic diagram of a structure in one embodiment where both safety pins are inserted into the safety holes;

[0028] Figure 7 This is a schematic diagram of the structure in one embodiment where the safety pin located at the top is inserted into the safety hole;

[0029] Figure 8 This is a schematic diagram of the structure in one embodiment where the safety pin is inserted into the safety hole;

[0030] Figure 9 This is a schematic diagram of the structure of the second driving component (spring extension of the spring cylinder) in one embodiment;

[0031] Figure 10 This is a schematic diagram of the structure of the second driving component (the spring of the spring cylinder is compressed) in one embodiment;

[0032] Figure 11 This is a schematic diagram of the lifting mechanism (connected to the guide rod) in one embodiment;

[0033] Figure 12 This is a structural schematic diagram of the safety column in one embodiment.

[0034] In the picture:

[0035] 100. Safety column; 1001. Safety hole; 110. Column body; 120. Safety plate; 1201. Through hole;

[0036] 200. Lifting mechanism; 210. First driving component; 211. Motor; 212. Gear; 220. First transmission component; 221. Transmission part; 2211. Chain; 2212. Chain seat; 222. Elastic connection part; 2221. Spring seat; 2222. Spring; 2223. Guide rod; 2224. Second sensing plate; 230. Lifting seat; 2301. Clearance hole; 231. Seat plate; 232. First end plate; 233. Second end plate;

[0037] 300. Fall arrestor; 310. Mounting base; 320. Second driving component; 321. Spring cylinder; 322. Solenoid valve; 330. Second transmission component; 331. Connecting column; 3311. First mounting slot; 332. Connecting rod; 333. First hinge shaft; 334. Second hinge shaft; 340. Safety pin; 3401. Second mounting slot; 350. Limiting component; 351. Limiting seat; 3511. Limiting hole; 3512. Through hole; 360. Second sensor; 370. First sensing plate; 371. First plate; 372. Second plate; 373. Third plate; 380. Protective cover;

[0038] 400. Sensing control mechanism; 410. First sensor;

[0039] 500. Guide mechanism; 510. Slide rail; 520. Slider. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] like Figures 1 to 5 As shown, the elevator safety anti-fall device in this embodiment includes a safety column 100, a lifting mechanism 200, an anti-fall mechanism 300, and a sensing control mechanism 400.

[0045] The safety column 100 has multiple safety holes 1001 spaced apart along the vertical direction (Z direction in the diagram), and the depth of the safety holes 1001 extends along a first direction perpendicular to the vertical direction (X direction in the diagram). The lifting mechanism 200 includes a first driving member 210, a first transmission member 220, and a lifting seat 230. The first driving member 210 is mounted on the safety column 100 and is connected to the lifting seat 230 via the first transmission member 220. The lifting seat 230 is located on one side of the safety column 100 along the first direction, and the lifting seat 230 has a through hole 2301 along the first direction, which faces the area of ​​the safety column 100 with the safety holes 1001. The fall protection mechanism 300 includes a mounting base 310, a second driving member 320, a second transmission member 330, two safety pins 340, and a limiting member 350. The mounting base 310 is fixed on the lifting seat 230, the second driving member 320, the second transmission member 330, two safety pins 340, and a limiting member 350. The drive member 320 is mounted on the mounting base 310 and connected to the second transmission member 330. The second transmission member 330 is rotatably connected to two safety pins 340. The limiting member 350 is mounted on the mounting base 310 and movably connected to the two safety pins 340 to limit the rotation angle of the safety pins 340. The sensing control mechanism 400 includes a controller (not shown in the figure) and a first sensor 410. The first sensor 410 is connected to the controller and is used to detect whether the first transmission member 220 is broken. When the first transmission member 220 is broken and / or the first drive member 210 is de-energized, the controller is triggered to control the fall arrest mechanism 300 to start: the second drive member 320 drives the second transmission member 330 to move the safety pins 340 along the first direction while rotating relative to the second transmission member 330. At the same time, the limiting member 350 limits the rotation angle of the safety pins 340 so that at least one safety pin 340 can be inserted into one of the safety holes 1001.

[0046] In this embodiment, the first driving member 210 drives the lifting seat 230 to run smoothly in the vertical direction via the first transmission member 220. When the fall protection mechanism 300 is not working, the safety pins 340 do not contact the safety column 100. When the first transmission member 220 breaks and / or the first driving member 210 is de-energized, the controller instantly activates the second driving member 320 of the fall protection mechanism 300 according to the signal. The second driving member 320 pushes the two safety pins 340 towards the safety column 100 (first direction) via the second transmission member 330. During this process, the safety pins 340 simultaneously generate two movements: one is movement along the first direction, and the other is rotation relative to the second transmission member 330; Figure 6 As shown, when the two safety pins 340 are respectively aligned with a safety hole 1001, the two safety pins 340 will not encounter resistance during their movement in the first direction until they are inserted into the corresponding safety hole 1001; as Figure 7 and Figure 8 As shown, when only one safety pin 340 is aligned with one of the safety holes 1001, the aligned safety pin 340 is inserted into the safety hole 1001. During the movement of the other safety pin 340 in the first direction, it is blocked by the gap between the two safety holes 1001. At this time, both safety pins 340 rotate slightly relative to the second transmission member 330. Under the action of the limiting member 350, the rotation angle of the safety pin 340 is small, and the aligned safety pin 340 can still be inserted into the safety hole 1001 after rotation. In this embodiment, when the second driving member 320 drives the two safety pins 340 to move towards the safety column 100 through the second transmission member 330, at least one safety pin 340 will always be inserted into one of the safety holes 1001, ensuring that the anti-fall mechanism 300 can provide anti-fall protection for the lifting structure when the lifting mechanism 200 descends uncontrollably, thus ensuring the safety of the lifting mechanism 200.

[0047] Compared with existing technologies, the elevator safety anti-fall device in this embodiment requires no manual intervention, automatically detects faults, and automatically executes protection. Whether it's a mechanical fault like "breakage of the first transmission component 220" or an electrical fault like "power failure of the first drive component 210," protection can be triggered, covering the main fault modes. Relying on the mechanical method of inserting the safety pin 340 into the safety hole 1001, combined with the spaced safety holes 1001, it ensures that locking and anti-fall can be completed quickly and accurately at any height, rather than by friction or electrical braking, resulting in extremely high reliability. By using two safety pins 340, even if one safety pin 340 fails to successfully insert into the safety hole 1001 for any reason, the other safety pin 340 can still insert into the safety hole 1001 to complete the locking and anti-fall, improving the safety of the elevator safety anti-fall device.

[0048] Furthermore, such asFigures 3 to 5 As shown, the second transmission component 330 includes a connecting column 331, a connecting rod 332, a first hinge shaft 333, and a second hinge shaft 334. One end of the connecting column 331 is connected to the output shaft of the second driving component 320. The end of the connecting column 331 away from the second driving component 320 is provided with a first mounting groove 3311 that penetrates the outer wall of the connecting column 331. The connecting rod 332 passes through the first mounting groove 3311 and is hinged to the connecting column 331 through the first hinge shaft 333. The axis of the first hinge shaft 333 extends along the second direction (Y direction in the figure). The connecting rod 332 can rotate around the first hinge shaft 333. The safety pin 340 has a second mounting groove 3401 that penetrates the outer wall of the safety pin 340 at one end away from the safety column 100. The two ends of the connecting rod 332 along its length direction correspond one-to-one with the second mounting grooves 3401 of the two safety pins 340. The end of the connecting rod 332 is inserted into the corresponding second mounting groove 3401 and is hinged to the corresponding safety pin 340 through a second hinge shaft 334. The axis of the second hinge shaft 334 extends along the second direction. The connecting rod 332 and the safety pin 340 can rotate around the corresponding second hinge shaft 334. The first direction, the second direction and the vertical direction are perpendicular to each other.

[0049] Understandably, when the fall arrestor 300 is triggered, the second drive member 320 drives the connecting column 331 to move along the first direction toward the safety column 100. When the two safety pins 340 are aligned with a certain safety hole 1001 and inserted into the safety hole 1001 at the same time, the connecting rod 332 remains vertical. When one of the safety pins 340 is blocked, the connecting rod 332 rotates around the first hinge axis 333, and at the same time drives the two safety pins 340 to naturally rotate around the corresponding second hinge axis 334. Thus, with the cooperation of the limiting member 350, they adjust their own angle to accurately insert into the safety hole 1001 and achieve reliable mechanical locking.

[0050] Furthermore, such as Figure 4 As shown, the limiting member 350 includes two limiting seats 351 spaced apart on the mounting base 310 along the first direction. The limiting seats 351 have limiting holes 3511 that correspond one-to-one with the two safety pins 340. There is a rotational clearance between the limiting holes 3511 and the safety pins 340.

[0051] In this embodiment, the limiting member 350 provides precise two-point constraint for the safety pin 340 through two spaced-apart limiting seats 351 and limiting holes 3511 thereon: the limiting holes 3511 guide the safety pin 340 to move stably along the first direction, ensuring that it is accurately aligned with the safety hole 1001; at the same time, the rotation gap between the limiting holes 3511 and the safety pin 340 allows the safety pin 340 to make necessary angle fine adjustments to smoothly insert into the safety hole 1001, while effectively limiting its excessive rotation and preventing the mechanism from jamming, thereby reliably achieving rapid and accurate locking of the safety pin 340 in an emergency.

[0052] Furthermore, the fall protection mechanism 300 also includes a second sensor 360, a first sensor plate 370, and bolts (not shown in the figure). The second sensor 360 is mounted on the mounting base 310 and connected to the controller, and the first sensor plate 370 is also connected to the connecting column 331 by bolts. The second driving member 320 can drive the connecting column 331 to move the first sensor plate 370 and the safety pin 340 synchronously in the first direction. When the fall protection mechanism 300 is closed, the first sensor plate 370 is located at the detection position of the second sensor 360, that is, the first sensor plate 370 is facing the second sensor 360.

[0053] The fall arrestor 300 achieves precise real-time monitoring of the position of the safety pin 340 by adding a second sensor 360 and a first sensor plate 370 fixed on the connecting column 331. When the fall arrestor 300 is closed, the first sensor plate 370 is in the detection position, and the system can confirm that the safety pin 340 has been fully retracted. This status signal is fed back to the controller, forming a closed-loop detection circuit, which can effectively prevent false start or operational interference caused by the safety pin 340 not being reset, and greatly improve the intelligence and operational reliability of the entire system.

[0054] Furthermore, the first sensing plate 370 includes a first plate 371, a second plate 372, and a third plate 373 connected vertically in sequence. The length of the first plate 371 extends along a first direction, the length of the second plate 372 extends along a vertical direction, and the length of the third plate 373 extends along a second direction and is located on one side of the second sensor 360 along the vertical direction. When the fall protection mechanism 300 is closed, the third plate 373 is located at the detection position of the second sensor 360, that is, the third plate 373 is directly facing the second sensor 360; the first plate 371 is connected by bolts.

[0055] In this embodiment, the third plate 373 is designed on one side of the second sensor 360 along the vertical direction. When the fall protection mechanism 300 is closed, the third plate 373 can accurately enter the detection area of ​​the second sensor 360 from the side, thus reliably confirming the closed state of the fall protection mechanism 300. The structural design of the first sensing plate 370 in this embodiment allows the first sensing plate 370 to avoid the movement direction of the second transmission member 330, which not only enhances the rigidity and anti-interference ability of the overall structure, but also improves the flexibility of equipment integration and the stability of the detection signal.

[0056] Furthermore, the first plate 371 is hinged to the first hinge shaft 333; and / or, the limiting seat 351 has a through hole 3512 for the first plate 371 to pass through, and the first plate 371 passes through the through hole 3512.

[0057] In this embodiment, the first plate 371 is directly hinged to the first hinge shaft 333, so that the first sensing plate 370 and the connecting column 331 move synchronously, realizing high precision and no hysteresis feedback of the fall protection mechanism 300. At the same time, the through hole 3512 on the limit seat 351 provides axial guidance and radial constraint for the first plate 371, effectively suppressing the vibration and displacement of the first sensing plate 370 in complex movements, ensuring the extreme stability and reliability of the position detection signal, thereby comprehensively improving the accuracy and anti-interference capability of the status monitoring system.

[0058] Furthermore, such as Figure 9 and Figure 10 As shown, the second drive unit 320 includes a spring cylinder 321 and a solenoid valve 322 connected to the controller. The spring cylinder 321 is connected to an air source (not shown in the figure) through a connecting pipe. The solenoid valve 322 is installed on the connecting pipe to control the air supply of the spring cylinder 321. When the first transmission unit 220 breaks and / or the first drive unit 210 is de-energized, the controller controls the solenoid valve 322 to close, thereby cutting off the air supply to the spring cylinder 321. The output shaft (i.e., piston rod) of the spring cylinder 321 moves toward the safety column 100 so that at least one safety pin 340 is inserted into one of the safety holes 1001.

[0059] The combination of spring cylinder 321 and solenoid valve 322 forms a safe drive system: in case of emergency such as the breakage of the first transmission component 220 or the power failure of the first drive component 210, the controller can depressurize the spring cylinder 321 by cutting off the solenoid valve 322. The output shaft and safety pin 340 are directly driven by the preload of the built-in spring, and mechanical locking can be completed instantly without external power. This greatly improves the speed and reliability of the fall protection response and ensures that the device can still automatically trigger protection even under extreme conditions of complete power loss.

[0060] In other embodiments, when the air supply is cut off without the first drive member 210 being de-energized and the first transmission member 220 being broken, the output shaft (i.e., piston rod) of the spring cylinder 321 will also move toward the safety column 100 so that at least one safety pin 340 is inserted into one of the safety holes 1001.

[0061] In this embodiment, as Figure 3 As shown, the fall arrestor 300 also includes a protective cover 380, which is disposed on the mounting base 310 and is used to protect the second transmission component 330, the safety pin 340, and the limiting component 350.

[0062] Furthermore, the first transmission component 220 includes a transmission part 221 and an elastic connection part 222, and the first driving component 210 is connected to the transmission part 221; the lifting seat 230 includes a seat plate 231 and a first end plate 232, the first end plate 232 is fixed to the upper end of the seat plate 231, the transmission part 221 passes through the first end plate 232 and is connected to the elastic connection part 222, the elastic connection part 222 elastically abuts against the lower surface of the first end plate 232, and the first sensor 410 is located on the side of the seat plate 231 away from the safety column 100. When the transmission part 221 breaks, the elastic connection part 222 is located at the detection position of the first sensor 410, and the first sensor 410 triggers the controller to control the anti-fall mechanism 300 to start.

[0063] In this embodiment, when the lifting mechanism 200 is operating normally, the elastic connecting part 222 contracts under the tension of the transmission part 221. The transmission part 221 passes through the first end plate 232 and connects to the elastic connecting part 222, so that the elastic connecting part 222 elastically abuts against the lower surface of the first end plate 232. At this time, the elastic connecting part 222 is located in the non-detection position of the first sensor 410. When the transmission part 221 breaks, the tension of the transmission part 221 on the elastic connecting part 222 is released, and the elastic connecting part 222 rebounds to the detection position of the first sensor 410, thereby realizing direct and rapid detection of the fracture fault of the first transmission component 220 and triggering the start of the fall protection mechanism 300. This embodiment converts mechanical faults into reliably perceptible electrical signals, greatly improving the system's response speed to transmission failures and overall safety.

[0064] Furthermore, such as Figure 2 and Figure 11As shown, the transmission part 221 includes a chain 2211 and two chain seats 2212. The elastic connection part 222 includes a spring seat 2221, a spring 2222, a guide rod 2223, and a second sensing plate 2224. The guide rod 2223 passes through the first end plate 232 and is connected to one end of the chain 2211 through the chain seat 2212. The lifting seat 230 also includes a second end plate 233 fixed to the lower end of the seat plate 231. The other end of the chain 2211 is connected to the second end plate 233 through another chain seat 2212. The first driving member 210 is connected to the chain 2211 in a transmission connection. The spring seat 2221 is fixed on the guide rod 2223, and the second sensing plate 2224 is fixed on the spring seat 2221 facing the direction of the chain 2211. At one end of the first end plate 232, a spring 2222 is sleeved on the guide rod 2223. One end of the spring 2222 in the length direction abuts against the first end plate 232, and the other end passes through the second sensing plate 2224 and extends into the limiting groove (not shown in the figure) of the spring seat 2221. The length of the second sensing plate 2224 extends along the second direction between the first sensor 410 and the first end plate 232. When the transmission part 221 breaks, the spring 2222 drives the spring seat 2221 to move the second sensing plate 2224 in the vertical direction to contact the first sensor 410. The first sensor 410 triggers the controller to control the anti-fall mechanism 300 to start. The first direction, the second direction and the vertical direction are perpendicular to each other.

[0065] When the chain 2211 is in normal transmission, the spring 2222 is compressed, and the entire transmission part 221 remains stable. Once the chain 2211 breaks, the guide rod 2223 connected to the broken end will lose tension, and the spring 2222 will immediately release its elastic potential energy, driving the spring seat 2221 and causing the second sensing plate 2224 to move rapidly and accurately away from the first end plate 232 along the guide rod 2223 until the second sensing plate 2224 contacts the first sensor 410. This process directly and without delay transforms the mechanical failure of the chain 2211 breakage into a change in the position of the second sensing plate 2224, which is reliably detected by the first sensor 410, thereby instantly sending a signal to the controller to activate the fall protection mechanism 300. The entire detection and triggering mechanism is driven entirely by the built-in spring 2222, requiring no external power. Its mechanical direct transmission ensures ultra-high speed and ultra-high reliability of response, providing crucial passive safety protection for the elevator.

[0066] Furthermore, such as Figure 12As shown, the safety column 100 includes a column body 110 and a safety plate 120. The column body 110 has a groove on the side facing the lifting seat 230. The safety plate 120 is fixed in the groove. The safety hole 1001 passes through the safety plate 120 along the first direction. The first driving member 210 includes a motor 211 and two gears 212 that mesh with the chain 2211. The motor 211 is fixed at the end of the column body 110. The drive shaft of the motor 211 is connected to the gears 212. The safety plate 120 has through holes 1201 at its two ends in the vertical direction for the chain 2211 to pass through. The chain 2211 passes through the groove and through the corresponding through hole 1201. One end of the chain 2211 is connected to the upper end of the lifting seat 230, and the other end is connected to the lower end of the lifting seat 230.

[0067] In this embodiment, the groove on the column body 110 forms a protective channel for the built-in chain 2211, effectively preventing external interference and collisions; the safety plate 120 fixed in the groove not only serves as a functional component for supporting the safety hole 1001, making it easy to process and replace separately, but also forms a sturdy guide and load-bearing frame together with the column body 110; the motor 211 synchronously drives the chain 2211 that runs through the upper and lower ends of the lifting seat 230 through the double gear 212, forming a stable and reliable closed-loop transmission system with a compact layout, efficient power transmission, and built-in main moving parts, which not only beautifies the appearance but also greatly improves the safety of equipment operation.

[0068] Furthermore, the elevator safety anti-fall device in this embodiment also includes a guide mechanism 500 that guides in the vertical direction, and the lifting seat 230 is slidably connected to the safety column 100 through the guide mechanism 500.

[0069] In this embodiment, the guide mechanism 500 enables a stable and smooth vertical sliding fit between the lifting seat 230 and the safety column 100. This not only effectively limits the lateral swaying and torsion that the lifting seat 230 may generate during operation, ensuring that it always rises and falls smoothly along the predetermined trajectory, but also significantly improves the smoothness of operation and positioning accuracy. At the same time, the guide mechanism 500 can effectively share the overturning moment caused by the load, significantly reducing the lateral load on the transmission chain 2211 and extending its service life. More importantly, the stable guide provides a fundamental guarantee for the precise alignment of the safety pin 340 and the safety hole 1001 in the fall arrest mechanism 300, avoiding the risk that the safety pin 340 may not be able to be smoothly inserted into the locking hole due to excessive shaking of the lifting seat 230, thereby ensuring the absolutely reliable triggering of the fall arrest function in an emergency.

[0070] Specifically, the guide mechanism 500 includes two slide rails 510 spaced apart along the second direction and a plurality of sliders 520 corresponding to the slide rails 510 (one slide rail 510 corresponds to a plurality of sliders 520). The slide rails 510 are fixed on the side of the safety column 100 facing the lifting seat 230, and the sliders 520 are fixed on the side of the seat plate 231 of the lifting seat 230 facing the safety column 100. The sliders 520 slide in cooperation with the slide rails 510.

[0071] The guide mechanism 500 in this embodiment adopts a structural design that combines a sliding rail 510 and multiple sliders 520. It can form a wide support surface in the second direction. Combined with the precise sliding of the sliders 520 on the sliding rail 510, it provides a highly stable vertical guide for the lifting seat 230, effectively suppressing sway and torsion during operation, significantly improving the lifting stability and positioning accuracy. At the same time, it reduces the lateral load on the transmission chain 2211 by distributing the load, providing a reliable guarantee for the precise alignment of the safety pin 340 and the hole of the fall arrest mechanism 300.

[0072] The elevator safety anti-fall device in this embodiment has a simple and compact overall structure and is easy to install.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A safety anti-fall device for an elevator, characterized in that, include: A safety column, wherein the safety column is provided with a plurality of safety holes spaced apart in the vertical direction, and the depth of the safety holes extends in a first direction perpendicular to the vertical direction; The lifting mechanism includes a first driving component, a first transmission component, and a lifting seat. The first driving component is mounted on the safety column and is connected to the lifting seat via the first transmission component. The lifting seat is located on one side of the safety column along the first direction and has a clearance hole through it along the first direction. The clearance hole is directly opposite the area on the safety column where the safety hole is located. A fall protection mechanism includes a mounting base, a second driving component, a second transmission component, two safety pins, and a limiting component. The mounting base is fixed on the lifting seat. The second driving component is mounted on the mounting base and connected to the second transmission component. The second transmission component is rotatably connected to the two safety pins. The limiting component is mounted on the mounting base and movably connected to the two safety pins to limit the rotation angle of the safety pins. A sensing control mechanism includes a controller and a first sensor connected to the controller for detecting whether the first transmission component is broken. When the first transmission component is broken and / or the first drive component is de-energized, the controller is triggered to activate the fall arrest mechanism: the second drive component drives the second transmission component to move the safety pin along the first direction while rotating it relative to the second transmission component, and the limiting component restricts the rotation angle of the safety pin so that at least one of the safety pins can be inserted into one of the safety holes.

2. The elevator safety anti-fall device according to claim 1, characterized in that, The second transmission component includes a connecting column, a connecting rod, a first hinge shaft, and a second hinge shaft. One end of the connecting column is connected to the output shaft of the second driving component. The end of the connecting column away from the second driving component has a first mounting groove penetrating through the outer wall of the connecting column. The connecting rod passes through the first mounting groove and is hinged to the connecting column via the first hinge shaft. The axis of the first hinge shaft extends along a second direction, and the connecting rod can rotate around the first hinge shaft. The end of the safety pin away from the safety column has a second mounting groove penetrating through the outer wall of the safety pin. The two ends of the connecting rod along its length direction correspond one-to-one with the second mounting grooves of the two safety pins. The end of the connecting rod is inserted into the corresponding second mounting groove and is hinged to the corresponding safety pin via a second hinge shaft. The axis of the second hinge shaft extends along the second direction, and the connecting rod and the safety pin can rotate around the corresponding second hinge shaft. The first direction, the second direction, and the vertical direction are perpendicular to each other.

3. The elevator safety anti-fall device according to claim 2, characterized in that, The limiting component includes two limiting seats spaced apart on the mounting base along the first direction. Each limiting seat has a limiting hole corresponding to one of the two safety pins, and there is a rotational clearance between the limiting hole and the safety pin.

4. The elevator safety anti-fall device according to claim 3, characterized in that, The fall protection mechanism further includes a second sensor, a first sensing plate, and a bolt. The second sensor is mounted on the mounting base and connected to the controller. The first sensing plate is also connected to the connecting column via the bolt. The second driving component can drive the connecting column to move the first sensing plate and the safety pin synchronously along the first direction. When the fall protection mechanism is closed, the first sensing plate is located at the detection position of the second sensor, that is, the first sensing plate is facing the second sensor.

5. The elevator safety anti-fall device according to claim 4, characterized in that, The first sensing plate includes a first plate, a second plate, and a third plate connected vertically in sequence. The length of the first plate extends along the first direction, the length of the second plate extends along the vertical direction, and the length of the third plate extends along the second direction and is located on one side of the second sensor along the vertical direction. When the fall protection mechanism is closed, the third plate is located at the detection position of the second sensor, that is, the third plate is directly facing the second sensor. The first plate is connected to the mechanism by the bolt.

6. The elevator safety anti-fall device according to claim 5, characterized in that, The first plate is hinged to the first hinge shaft; and / or, the limiting seat has a through hole through which the first plate passes, and the first plate passes through the through hole.

7. The elevator safety anti-fall device according to claim 1, characterized in that, The second driving component includes a spring cylinder and a solenoid valve connected to the controller. The spring cylinder is connected to an air source via a connecting pipe, and the solenoid valve is mounted on the connecting pipe to control the air supply to the spring cylinder. When the first transmission component breaks and / or the first driving component is de-energized, the controller controls the solenoid valve to close, causing the spring cylinder to stop supplying air. The output shaft of the spring cylinder moves toward the safety column, so that at least one of the safety pins is inserted into one of the safety holes.

8. The elevator safety anti-fall device according to any one of claims 1 to 7, characterized in that, The first transmission component includes a transmission part and an elastic connecting part, and the first driving component is connected to the transmission part; the lifting seat includes a seat plate and a first end plate, the first end plate is fixed to the upper end of the seat plate, the transmission part passes through the first end plate and is connected to the elastic connecting part, the elastic connecting part elastically abuts against the lower surface of the first end plate, and the first sensor is disposed on the side of the seat plate away from the safety column. When the transmission part breaks, the elastic connecting part is located at the detection position of the first sensor, and the first sensor triggers the controller to control the fall protection mechanism to start.

9. The elevator safety anti-fall device according to claim 8, characterized in that, The transmission unit includes a chain and two chain seats. The elastic connection unit includes a spring seat, a spring, a guide rod, and a second sensing plate. The guide rod passes through the first end plate and is connected to one end of the chain via the chain seat. The lifting seat also includes a second end plate fixed to the lower end of the seat plate. The other end of the chain is connected to the second end plate via another chain seat. The first driving member is connected to the chain drive. The spring seat is fixed on the guide rod. The second sensing plate is fixed to the end of the spring seat facing the first end plate. The spring is sleeved on the guide rod. One end of the spring in the length direction abuts against the first end plate, and the other end passes through the second sensing plate and extends into the limiting groove of the spring seat. The length of the second sensing plate extends along the second direction between the first sensor and the first end plate. When the transmission unit breaks, the spring drives the spring seat to move the second sensing plate vertically until it contacts the first sensor. The first sensor triggers the controller to activate the fall protection mechanism. The first direction, the second direction, and the vertical direction are perpendicular to each other.

10. The elevator safety anti-fall device according to claim 9, characterized in that, The safety column includes a column body and a safety plate. The column body has a groove on the side facing the lifting seat. The safety plate is fixed to the groove opening. The safety hole penetrates the safety plate along the first direction. The first driving component includes a motor and two gears that mesh with the chain. The motor is fixed to the end of the column body and is connected to the gears for transmission. The safety plate has through holes at its two ends in the vertical direction for the chain to pass through. The chain passes through the groove and the corresponding through hole. One end of the chain is connected to the upper end of the lifting seat, and the other end is connected to the lower end of the lifting seat.

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