Safety tongs capable of automatically resetting

Abstract

The invention discloses an automatic reset safety clamp, and relates to the field of car elevators, the automatic reset safety clamp comprises a safety clamp main body, a mounting frame is arranged on the safety clamp main body, two symmetrical supporting seats are arranged on the mounting frame, movable clamps are slidably connected to the two supporting seats, a lifting rod is arranged between the two movable clamps, and the lifting rod is arranged on the lifting rod. A lifting head is fixed to the end, away from the two movable tongs bodies, of the lifting rod, a steel wire rope connecting frame is arranged on one side of the safety tongs body, and a connecting reset mechanism is arranged between the steel wire rope connecting frame and the lifting head. The connecting reset mechanism capable of automatically resetting is arranged between the steel wire rope connecting frame and the lifting head, and the movable clamp can be reset through the automatic connecting reset mechanism after the movable clamp clamps a rail in an elevator shaft, so that manual intervention is not needed, the elevator maintenance efficiency is improved, and the safety and the maintenance efficiency of elevator operation are effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the field of compartment elevators, in particular to an automatic reset safety clamp. BACKGROUND

[0002] The compartment elevator is a vital vertical transportation tool in modern high-rise buildings, and the safety and reliability of the operation thereof are the primary goal of design, manufacturing and maintenance work. Among various safety protection devices of the elevator, the safety clamp plays an important role as the last mechanical defense line. The safety clamp is mainly used for clamping and locking on the elevator guide rail to generate a strong braking force when the running speed of the elevator exceeds the limited value or an accident occurs, so that the emergency stop of the car is realized, and serious accidents are effectively prevented.

[0003] At present, the widely used traditional safety clamp mainly relies on a pure mechanical structure to realize the braking function. When the safety system is triggered, the clamp body is driven by a steel wire rope or a lever mechanism to make the wedge or the roller thereof contact and frictionally self-lock with the guide rail, so that the braking is completed. However, after completing the emergency braking once, the braking component is often in the locked state and cannot be automatically separated. The reset process usually needs professional maintenance personnel to arrive at the scene to manually operate through a special tool, so that the safety clamp is released from the clamping on the guide rail and restored to the preparatory state capable of normal work.

[0004] The reset mode depending on manual intervention has a significant response time delay from the occurrence of the fault to the completion of the reset by the maintenance personnel. During the period, the elevator cannot be restored to normal operation, which seriously affects the vertical transportation efficiency and user experience of the building. SUMMARY

[0005] The application aims to solve the problem that the reset mode depending on manual intervention has a significant response time delay from the occurrence of the fault to the completion of the reset by the maintenance personnel, during which the elevator cannot be restored to normal operation, which seriously affects the vertical transportation efficiency and user experience of the building.

[0006] In order to achieve the above-mentioned purpose, the application specifically adopts the following technical scheme: An automatic reset safety clamp comprises a safety clamp body, a mounting frame is arranged on the safety clamp body, two symmetrical supporting seats are arranged on the mounting frame, the two ends of the supporting seat are in sliding connection with the safety clamp body, movable clamps are in sliding connection with the two supporting seats, a pull rod is arranged between the two movable clamps, a pull head is fixed to the end of the pull rod away from the two movable clamps, a steel wire rope connecting frame is arranged on one side of the safety clamp body, and a connecting reset mechanism is arranged between the steel wire rope connecting frame and the pull head.

[0007] By adopting the technical scheme, the connecting reset mechanism capable of automatic reset is arranged between the steel wire rope connecting frame and the lifting head, after the movable clamp is clamped to the track in the elevator shaft, the movable clamp can be reset by the automatic connecting reset mechanism, so that manual intervention is not required, the efficiency of elevator maintenance is improved, and the safety and efficiency of elevator operation are effectively ensured.

[0008] Further, the connecting reset mechanism comprises a connecting seat fixed on the safety clamp body, a reset rod fixed on the connecting seat, a reset block slidingly connected on the reset rod, a reset spring arranged between the reset block and the end of the reset rod away from the connecting seat, a foreign matter prevention assembly arranged on the reset rod, a stroke monitoring assembly arranged on one side of the reset rod, and a connecting assembly arranged between the reset block, the lifting head and the steel wire rope connecting frame.

[0009] By adopting the technical scheme, the connecting reset mechanism capable of automatic reset is arranged between the steel wire rope connecting frame and the lifting head, after the movable clamp is clamped to the track in the elevator shaft, the movable clamp can be reset by the automatic connecting reset mechanism, so that manual intervention is not required, the efficiency of elevator maintenance is improved, and the safety and efficiency of elevator operation are effectively ensured.

[0010] Further, the connecting assembly comprises a connecting arm one fixed on the lifting head, a connecting arm two fixed on the connecting arm one, a support arm fixed on the end of the connecting arm one close to the connecting arm two, a support arm fixedly connected with the reset block, and the steel wire rope connecting frame fixedly connected with the end of the connecting arm two away from the connecting arm one.

[0011] By adopting the technical scheme, the connecting arm one, the connecting arm two and the support arm are used to connect the lifting head, the steel wire rope connecting frame and the reset block, so that the synchronism and timeliness of clamping and resetting actions are ensured, the connecting arm one and the support arm optimize the force transmission path, reduce energy loss, and significantly improve the braking response speed and resetting reliability of the safety clamp.

[0012] Further, a limiting arm is fixed on the connecting seat, a limiting groove is formed on the limiting arm, and the connecting arm one penetrates through the limiting groove on the limiting arm and moves in the limiting groove.

[0013] By adopting the technical scheme, when the connecting arm one moves in the limiting groove, the two side walls of the limiting groove can limit the lateral deviation of the connecting arm one, so that the connecting arm one is prevented from shaking or mispositioning during force receiving, and the connecting arm one is ensured to always drive the lifting rod and the movable clamp to move along the preset direction.

[0014] Further, an inclined surface is arranged on the movable direction of the connecting arm one, and the inclined surface arranged on the connecting arm one corresponds to the limiting groove of the limiting arm.

[0015] By adopting the above technical solution, when foreign objects appear in the limiting groove, during the movement of the connecting arm, the inclined surface of the connecting arm will push the foreign objects out of the limiting groove of the limiting arm, thereby effectively preventing the accumulation of foreign objects from hindering the smooth movement of the connecting arm, ensuring the cleanliness of the inside of the limiting groove, and reducing the frictional wear between the connecting arm and the limiting groove.

[0016] Furthermore, the foreign object prevention assembly includes two symmetrical support rings fixed on the reset block, and support rings are fixed at both ends of the reset rod. A corrugated rubber sleeve is provided between the support rings and the support rings. The two ends of the corrugated rubber sleeve are fixedly connected to the support rings and the support rings. A vent hole is provided on the support ring.

[0017] By adopting the above technical solution, when the reset block slides along the reset rod, the corrugated rubber sleeve is stretched or compressed synchronously with the movement of the reset block. This allows it to maintain a good sealing effect even when exposed to the humid and high-temperature environment of the elevator shaft for a long time, which greatly reduces the failure rate of the connection reset mechanism and provides a solid guarantee for the long-term reliable operation of the safety clamp.

[0018] Furthermore, the travel monitoring component includes a support block 1 disposed on one side of the reset rod, the support block 1 being fixedly connected to a support ring 2 near the reset spring, the support block 2 being disposed on one side of the reset rod, the support block 2 being fixedly connected to the corresponding support ring 1, and a laser rangefinder being fixed on the support block 1, the output end of the laser rangefinder facing the support block 2.

[0019] By adopting the above technical solution, the laser rangefinder collects the distance data between support block one and support block two in real time, which can significantly improve the accuracy and reliability of travel monitoring, remind maintenance personnel to check whether the elasticity of the reset spring is stuck, and provide precise support for the intelligent early warning and preventive maintenance of the elevator safety system.

[0020] Furthermore, a dustproof sleeve is fixed on the support block 1, the laser rangefinder is located inside the dustproof sleeve 1, a dustproof sleeve 2 is slidably connected to the end of the dustproof sleeve 1 near the support block 2, a dustproof sleeve 3 is slidably connected to the end of the dustproof sleeve 2 near the support block 2, and the end of the dustproof sleeve 3 away from the dustproof sleeve 2 is fixedly connected to the support block 2.

[0021] By adopting the above technical solution, the coordinated expansion and contraction of the nested dustproof sleeve one, dustproof sleeve two, and dustproof sleeve three creates a fully enclosed protective channel for the detection optical path of the laser rangefinder. This ensures that the emitting end of the laser rangefinder and the reflective surface of the support block two remain clean even in the harsh environment of elevator shafts that are often damp and dusty.

[0022] Furthermore, the mounting bracket is provided with two symmetrical pads, which abut against the support base and the mounting bracket, and the side of the pads near the mounting bracket is arc-shaped.

[0023] By adopting the above technical solution, the arc-shaped pad is placed between the support base and the mounting bracket. The arc-shaped pad is used to transmit force, which is conducive to the stability of the force and the stability of the horizontal component force, thereby making the moving clamp stable during braking.

[0024] Furthermore, the mounting bracket is a U-shaped spring, and the mounting bracket is fixedly connected to the safety clamp body by at least three fixing bolts. The mounting holes of the safety clamp body near the two ends of the mounting bracket corresponding to the fixing bolts are elongated. An adjusting bolt is fixed on the side of the support base away from the movable clamp. The adjusting bolt passes through the pad, the mounting bracket and the safety clamp body, and the hole passing through the safety clamp body is elongated. An adjusting nut is threaded to the end of the adjusting bolt away from the support base.

[0025] By adopting the above technical solution, the adjusting bolt is connected to the pad, and the adjusting nut is rotated to allow the adjusting bolt to move the support base, thereby making it easy to adjust the distance between the movable clamps on the two support bases and adapt to different tracks.

[0026] In summary, this application includes at least one of the following beneficial effects; 1. In this application, in the initial state, the return spring is in its naturally extended state, the return block is located at the end of the return rod near the connecting seat, and the movable clamp is in the open position, not in contact with the elevator guide rail. When the elevator is running at overspeed or there is a risk of accidental fall, the elevator control system triggers the safety device. The wire rope connecting frame is subjected to the emergency tension of the wire rope, which drives the return block to slide along the return rod away from the main body of the safety clamp. The return spring is compressed and stores elastic potential energy. At the same time, the movable clamp quickly clamps the elevator guide rail, and the anti-foreign object component protects the return rod. The stroke monitoring component monitors the movement position of the return block in real time. When the elevator fault is cleared, the tension of the wire rope disappears, the return spring releases the stored elastic potential energy, and pushes the return block along the return rod towards the main body of the safety clamp. Sliding towards the connecting seat, the reset block pulls the lifting rod and movable clamp to reset via the connecting assembly. The movable clamp separates from the elevator guide rail, returning to its initial open state, ready for the next work cycle. This achieves automatic reset of the safety clamp without manual intervention, significantly shortening the recovery time after elevator malfunctions and greatly improving elevator maintenance efficiency and operational continuity. Simultaneously, the synergistic effect of the foreign object prevention component and the stroke monitoring component effectively avoids interference from external impurities, monitors the reset stroke status in real time, and provides accurate status feedback and early warning support for the elevator safety system. This comprehensively ensures the safety, reliability, and intelligence level of elevator operation, meeting the dual needs of modern elevators for safety protection and efficient operation and maintenance.

[0027] 2、The application matches the length of the limiting groove with the maximum sliding stroke of the reset block, when the connecting arm one moves in the limiting groove, the two side inner walls of the limiting groove can limit the lateral deviation of the connecting arm one, avoid the connecting arm one from shaking or mispositioning during the force process, ensure that the connecting arm one always drives the pull rod and the movable clamp to move along the preset direction, achieve the purpose of further ensuring the position accuracy when the movable clamp clamps the guide rail, at the same time, prevent the reset spring from uneven force due to the deviation of the connecting arm one, prolong the service life of the reset spring, improve the stability of the overall structure of the safety clamp, at the same time, the setting of the limiting arm can also constrain the limit position of the connecting arm one, avoid the reset block from excessive sliding beyond the effective stroke range of the reset rod, prevent the reset spring from being damaged due to excessive compression, provide the purpose of double protection for the operation of the safety clamp.

[0028] 3、The application adopts high-strength wear-resistant engineering plastic for the dustproof sleeve one, two and three, which are integrally injection molded, the surface is polished to reduce the sliding friction resistance, the matching gap between adjacent sleeves is controlled within 0.1-0.2mm, ensure smooth extension and not easy to enter dust, when the reset block slides along the reset rod, the supporting block two drives the dustproof sleeve three to move synchronously, the dustproof sleeve three slides along the inner wall of the dustproof sleeve two, the dustproof sleeve two slides along the inner wall of the dustproof sleeve one, the three always maintain a nested state, completely cover the detection light path area of the laser range finder, achieve the purpose of effectively blocking the dust, water vapor and oil stains in the elevator shaft from adhering to the emission lens of the laser range finder or the reflecting surface of the supporting block two, avoid the laser signal from being blocked or scattered, ensure the accuracy of the ranging data, provide reliable protection for the braking and reset state judgment of the safety clamp. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is the first three-dimensional structure schematic diagram of the safety clamp with automatic reset in the application; Figure 2 is the second three-dimensional structure schematic diagram of the safety clamp with automatic reset in the application; Figure 3 is the split structure schematic diagram of the connecting reset mechanism in the application; Figure 4 is the first part structure schematic diagram of the connecting reset mechanism in the application; Figure 5 is the second part structure schematic diagram of the connecting reset mechanism in the application; Figure 6 is the partial split schematic diagram of the safety clamp with automatic reset in the application.

[0030] BRIEF DESCRIPTION OF DRAWINGS 1, safety tongs main body; 2, support seat; 3, movable tongs; 4, lifting rod; 5, lifting head; 6, steel wire rope connecting frame; 7, connecting reset mechanism; 71, reset rod; 72, reset block; 73, reset spring; 74, connecting assembly; 741, connecting arm one; 742, connecting arm two; 743, support arm; 744, limiting arm; 75, foreign matter prevention assembly; 751, support ring one; 752, support ring two; 753, corrugated rubber sleeve; 76, stroke monitoring assembly; 761, support block one; 762, support block two; 763, laser range finder; 764, dustproof sleeve one; 765, dustproof sleeve two; 766, dustproof sleeve three; 77, connecting seat; 8, mounting frame; 9, cushion block; 10, adjusting bolt. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying drawings. Figure 1 The present application is further described in detail.

[0032] The present application discloses an automatic reset safety tongs.

[0033] Referring to Figure 1 , Figure 2 and Figure 3 , an automatic reset safety tongs, comprising a safety tongs main body 1, the safety tongs main body 1 is provided with a mounting frame 8, the mounting frame 8 is provided with two symmetrical support seats 2, the two ends of the support seat 2 are slidably connected with the safety tongs main body 1, two movable tongs 3 are slidably connected on the two support seats 2, a lifting rod 4 is installed between the two movable tongs 3, a lifting head 5 is fixed on the end of the lifting rod 4 away from the two movable tongs 3, a steel wire rope connecting frame 6 is arranged on one side of the safety tongs main body 1, and a connecting reset mechanism 7 is arranged between the steel wire rope connecting frame 6 and the lifting head 5.

[0034] In addition, the connecting reset mechanism 7 comprises a connecting seat 77 fixed on the safety tongs main body 1, a reset rod 71 is fixed on the connecting seat 77, a reset block 72 is slidably connected on the reset rod 71, a reset spring 73 is arranged between the reset block 72 and the end of the reset rod 71 away from the connecting seat 77, a foreign matter prevention assembly 75 is arranged on the reset rod 71, a stroke monitoring assembly 76 is arranged on one side of the reset rod 71, and a connecting assembly 74 is arranged between the reset block 72 and the lifting head 5 and the steel wire rope connecting frame 6.

[0035] The automatic reset safety clamp is installed by fixing the safety clamp body 1 to the corresponding position on the bottom of the elevator car, connecting the steel wire rope connecting frame 6 with the safety steel wire rope of the elevator, and arranging the movable clamp 3 corresponding to the elevator guide rail. In the initial state, the reset spring 73 is in the natural elongation state, the reset block 72 is located at one end of the reset rod 71 close to the connecting seat 77, and the movable clamp 3 is in the open position and does not contact the elevator guide rail. When the elevator runs at a high speed or there is a risk of accidental falling, the elevator control system triggers the safety device, the steel wire rope connecting frame 6 is subjected to the emergency tension of the steel wire rope, the reset block 72 is driven to slide along the reset rod 71 to move away from the safety clamp body 1, the reset spring 73 is compressed and stores elastic potential energy, and at the same time, the connecting assembly 74 drives the lifting rod 4 and the two movable clamps 3 to slide along the support seat 2 towards each other, so that the movable clamp 3 quickly clamps the elevator guide rail to realize the emergency braking of the elevator through friction. During braking, the foreign matter prevention assembly 75 expands and contracts synchronously with the sliding of the reset block 72, always wrapping the sliding area of the reset rod 71, avoiding dust, oil stains or small debris from entering the gap between the reset rod 71 and the reset block 72, ensuring long-term stable operation, and the travel monitoring assembly 76 detects the movement distance data of the reset block 72 in real time, calculates the sliding stroke of the reset block 72 through the distance change value, and then feeds back the clamping degree of the movable clamp 3. At the same time, according to the monitoring of the travel monitoring assembly 76, whether the reset block 72 is completely reset, when the elevator fault is eliminated, the steel wire rope tension disappears, the reset spring 73 releases the stored elastic potential energy, and drives the reset block 72 to slide along the reset rod 71 towards the connecting seat 77. The reset block 72 pulls the lifting rod 4 and the movable clamp 3 through the connecting assembly 74, the movable clamp 3 is separated from the elevator guide rail, and returns to the initial open state, waiting for the next working cycle. Through the connection of the reset mechanism 7, the automatic reset function of the safety clamp is realized, so that manual intervention is not required, the efficiency of elevator maintenance is improved, and the reliability and intelligent level of the safety clamp are further improved through the setting of the foreign matter prevention assembly 75 and the travel monitoring assembly 76.

[0036] Referring to Figure 2 , Figure 3 and Figure 4 , the connecting assembly 74 includes a connecting arm one 741 fixed on the lifting head 5, a connecting arm two 742 fixed on the connecting arm one 741, a supporting arm 743 fixed at one end of the connecting arm one 741 close to the connecting arm two 742, the supporting arm 743 is fixedly connected with the reset block 72, and the steel wire rope connecting frame 6 is fixedly connected with one end of the connecting arm two 742 away from the connecting arm one 741.

[0037] When the steel wire rope connecting frame 6 is subjected to an emergency tension, the connecting arm two 742 transmits the tension to the connecting arm one 741, while the supporting arm 743 drives the reset block 72 to slide along the reset rod 71 to compress the reset spring 73. During the reset stage, when the reset block 72 slides under the pushing force of the reset spring 73, the supporting arm 743 pulls the connecting arm one 741 to move reversely, the connecting arm two 742 drives the steel wire rope connecting frame 6 to reset, and the connecting arm one 741 drives the lifting rod 4 and the movable clamp 3 to reset synchronously through the lifting head 5. By connecting the lifting head 5, the steel wire rope connecting frame 6 and the reset block 72 through the connecting arm one 741, the connecting arm two 742 and the supporting arm 743, the synchronization and timeliness of the clamping and resetting actions are ensured, the connecting arm one 741 and the supporting arm 743 optimize the force transmission path, reduce energy loss, and significantly improve the braking response speed and reset reliability of the safety clamp.

[0038] With reference to Figure 2 and Figure 3 , the connecting seat 77 is fixed with a limiting arm 744, a limiting slot is formed in the limiting arm 744, and the connecting arm one 741 penetrates through the limiting slot in the limiting arm 744 and moves in the limiting slot.

[0039] The length of the limiting slot matches the maximum sliding stroke of the reset block 72. When the connecting arm one 741 moves in the limiting slot, the two side walls of the limiting slot can limit the lateral deviation of the connecting arm one 741, avoid the connecting arm one 741 from shaking or mispositioning during the force process, ensure that the connecting arm one 741 always drives the lifting rod 4 and the movable clamp 3 to move along the preset direction, further guarantee the position accuracy when the movable clamp 3 clamps the guide rail, prevent the reset spring 73 from being unevenly stressed due to the deviation of the connecting arm one 741, prolong the service life of the reset spring 73, and improve the stability of the overall structure of the safety clamp. In addition, the limiting arm 744 can also constrain the limit position of the connecting arm one 741, avoid the reset block 72 from excessively sliding out of the effective stroke range of the reset rod 71, prevent the reset spring 73 from being damaged due to excessive compression, and provide double protection for the operation of the safety clamp. Through the cooperative action of the limiting arm 744 and the limiting slot, the accurate guidance of the movement of the connecting arm one 741 is ensured, the vibration interference generated during the operation of the elevator is effectively offset, it is ensured that the movable clamp 3 can stably and uniformly clamp the guide rail during emergency braking, and the problem of accelerated wear of the guide rail or the movable clamp 3 due to excessive unilateral stress is avoided.

[0040] With reference to Figure 2 and Figure 3 , a slope is arranged in the moving direction of the connecting arm one 741, and the slope arranged on the connecting arm one 741 corresponds to the limiting slot of the limiting arm 744.

[0041] The slope is matched with the inner wall edge of the limiting groove. When the connecting arm 741 moves along the limiting groove, the slope of the connecting arm 741 pushes out the foreign matter in the limiting groove of the limiting arm 744 in the process of movement, effectively avoids the foreign matter accumulation from hindering the smooth movement of the connecting arm 741, guarantees the internal cleaning of the limiting groove, reduces the friction loss between the connecting arm 741 and the limiting groove, further ensures the movement precision and stability of the connecting arm 741 in the limiting groove, sets the slope in the movable range of the connecting arm 741 in the limiting groove, so that the clamping and resetting actions of the movable clamp 3 are always kept accurate and controllable, reduces the fault risk of the safety clamp response delay or the resetting failure caused by the foreign matter jamming, and improves the long-term reliable operation ability of the safety clamp.

[0042] With reference to Figure 1 , Figure 3 and Figure 5 , the anti-foreign-matter assembly 75 includes two symmetrical supporting rings one 751 fixed on the resetting block 72, the two ends of the resetting rod 71 are fixed with supporting rings two 752, the supporting ring one 751 and the supporting ring two 752 are provided with a corrugated rubber sleeve 753, the two ends of the corrugated rubber sleeve 753 are fixedly connected with the supporting ring one 751 and the supporting ring two 752, and the supporting ring two 752 is provided with a vent hole.

[0043] The corrugated rubber sleeve 753 is made of oil-resistant and high-temperature-resistant fluororubber material, has excellent stretchability and anti-aging performance, and is stretched or compressed synchronously with the movement of the reset block 72 when the reset block 72 slides along the reset rod 71, always completely covers the matching area of the reset rod 71 and the reset block 72, forms a sealed protective barrier, effectively blocks dust, metal debris, lubricating oil mist and other foreign matters in the elevator shaft from entering the inside of the connecting reset mechanism 7, avoids scratches or rust on the surface of the reset rod 71, ensures the smoothness of the sliding of the reset block 72, and the air vent hole with a diameter of 2-3 mm is arranged on the support ring two 752, which can balance the pressure difference inside and outside the rubber sleeve when the corrugated rubber sleeve 753 stretches and contracts, prevent the rubber sleeve from deforming or being damaged due to uneven internal and external pressure, ensure that the stretching action of the corrugated rubber sleeve 753 is synchronous with the sliding of the reset block 72, and will not generate additional resistance to the movement of the connecting reset mechanism 7. In addition, the two ends of the corrugated rubber sleeve 753 are firmly bonded with the support ring one 751 and the support ring two 752 through high-temperature-resistant sealing glue, which can maintain good protection for a long time even in a humid or heavily oiled elevator shaft environment, significantly prolong the maintenance cycle of the connecting reset mechanism 7, reduce the use cost of the safety gear, and effectively isolate the erosion of external pollutants on the sliding pair of the reset rod 71 by sleeving the corrugated rubber sleeve 753 on the reset rod 71 and supporting the corrugated rubber sleeve 753 by the support ring one 751 and the support ring two 752. At the same time, the design of the air vent hole eliminates the air pressure resistance when the corrugated rubber sleeve 753 stretches and contracts, ensures that the connecting reset mechanism 7 can maintain stable sliding performance in various harsh environments, maintains good sealing effect even if it is exposed to the humid and high-temperature environment of the elevator shaft for a long time, greatly reduces the failure rate of the connecting reset mechanism 7, and provides a solid guarantee for the long-term reliable operation of the safety gear.

[0044] With reference to Figure 2 and Figure 5 The stroke monitoring assembly 76 includes a support block one 761 arranged on one side of the reset rod 71, the support block one 761 is fixedly connected with the support ring two 752 close to the reset spring 73, one side of the reset rod 71 is provided with a support block two 762, the support block two 762 is fixedly connected with the corresponding support ring one 751, and the support block one 761 is fixedly connected with a laser range finder 763, and the output end of the laser range finder 763 faces the support block two 762.

[0045] The laser range finder 763 adopts high-precision pulse laser technology and can collect distance data between the support block one 761 and the support block two 762 in real time. When the reset block 72 slides along the reset rod 71, the support block two 762 moves synchronously with the reset block 72. The laser range finder 763 emits a laser pulse and receives the reflection signal on the surface of the support block two 762, accurately calculates the real-time distance difference between the two, and the distance difference directly corresponds to the sliding stroke of the reset block 72, which can be converted into the clamping displacement of the movable clamp 3. The output signal of the laser range finder 763 can be received by the elevator control system in real time. When the stroke reaches the preset braking threshold, it is determined that the safety clamp has completed effective braking. In the reset stage, if the distance is not restored to the initial reference value, the system can immediately issue a reset abnormality alarm to remind the maintenance personnel to check whether the elasticity of the reset spring 73 is stuck. By using the laser range finder 763 to monitor the position of the reset block 72 in real time, the accuracy and reliability of the stroke monitoring can be significantly improved, and accurate support is provided for the intelligent early warning and preventive maintenance of the elevator safety system.

[0046] With reference to Figure 2 and Figure 5 A dust sleeve one 764 is fixed on the support block one 761, and the laser range finder 763 is located in the dust sleeve one 764. The dust sleeve one 764 is slidably connected with a dust sleeve two 765 at one end close to the support block two 762. The dust sleeve two 765 is slidably connected with a dust sleeve three 766 at one end close to the support block two 762. The dust sleeve three 766 is fixedly connected with the support block two 762 at one end away from the dust sleeve two 765.

[0047] The dustproof sleeve one 764, the dustproof sleeve two 765 and the dustproof sleeve three 766 are integrally injection molded by high-strength wear-resistant engineering plastic, the surface is polished to reduce the sliding friction resistance, the matching gap between adjacent sleeves is controlled within 0.1-0.2mm, ensuring smooth extension and contraction and preventing dust from entering, when the reset block 72 slides along the reset rod 71, the support block two 762 drives the dustproof sleeve three 766 to move synchronously, the dustproof sleeve three 766 slides along the inner wall of the dustproof sleeve two 765, the dustproof sleeve two 765 slides along the inner wall of the dustproof sleeve one 764, the three always maintain a nested state, completely covering the detection light path area of the laser range finder 763, effectively preventing dust, water vapor and oil stains in the elevator shaft from adhering to the transmitting lens of the laser range finder 763 or the reflecting surface of the support block two 762, avoiding the laser signal from being blocked or scattered, ensuring the accuracy of the ranging data, through the coordinated extension and contraction of the nested dustproof sleeve one 764, the dustproof sleeve two 765 and the dustproof sleeve three 766, a fully enclosed protective channel is constructed for the detection light path of the laser range finder 763, so that the transmitting end of the laser range finder 763 and the reflecting surface of the support block two 762 can always maintain a clean state even in a long-term humid and dusty environment, avoiding ranging errors or signal loss caused by light path pollution, providing reliable protection for the braking and reset state judgment of the safety clamp.

[0048] With reference to Figure 1 , Figure 2 and Figure 6 , two symmetrical pads 9 are arranged on the mounting bracket 8, the pads 9 abut against the support seat 2 and the mounting bracket 8, and the side of the pads 9 close to the mounting bracket 8 is arc-shaped.

[0049] The arc-shaped side of the pads 9 abuts against the inner wall of the mounting bracket 8, the pads 9 are made of high-strength alloy material, and their thickness is designed according to the load parameters of the elevator car, forming a rigid support between the support seat 2 and the mounting bracket 8, effectively dispersing the impact force generated when the movable clamp 3 clamps the guide rail, and the arc-shaped pads 9 arranged between the support seat 2 and the mounting bracket 8 can help stabilize the force and horizontal component, making the movable clamp 3 stable when braking and prolonging the service life of the mounting bracket 8.

[0050] With reference to Figure 1 , Figure 2 and Figure 6 , the mounting bracket 8 is a U-shaped spring, the mounting bracket 8 is fixedly connected to the safety clamp body 1 by at least three fixing bolts, the safety clamp body 1 close to the two ends of the mounting bracket 8 has long strip-shaped mounting holes corresponding to the fixing bolts, and the side of the support seat 2 away from the movable clamp 3 is fixedly provided with an adjusting bolt 10, the adjusting bolt 10 penetrates the pads 9, the mounting bracket 8 and the safety clamp body 1, and the hole penetrating the safety clamp body 1 is long strip-shaped, and the end of the adjusting bolt 10 away from the support seat 2 is threadedly connected with an adjusting nut.

[0051] The mounting frame 8 is a U-shaped spring, the mounting frame 8 is fixedly connected with the safety tongs body 1 by at least three fastening bolts, the mounting holes near the two ends of the mounting frame 8 are long holes, the adjusting nut abuts against the safety tongs body 1, the adjusting nut is rotated to drive the adjusting bolt 10 to move on the adjusting nut, the pad 9 is driven to slide along the safety tongs body 1, and the horizontal positions of the support seat 2 and the movable tongs 3 are finely adjusted, the pad 9 drives the support seat 2 and the movable tongs 3 through the adjusting bolt 10, and thus the installation position of the safety tongs is finely adjusted, and different rails are conveniently adapted.

[0052] Working principle: the automatic reset safety tongs is in the natural elongation state of the reset spring 73 in the normal operation stage of the elevator, the reset block 72 is located at the initial position of the reset rod 71 close to the connecting seat 77, and the movable tongs 3 keep the open posture and leave a reasonable safety gap from the elevator guide rail, without contact friction, when the elevator appears emergency conditions such as overspeed operation or accidental falling, the elevator safety control system triggers the steel wire rope connecting frame 6, the emergency tension of the steel wire rope is transmitted to the connecting arm one 741 through the connecting arm two 742, and then the support arm 743 drives the reset block 72 to slide along the reset rod 71 away from the connecting seat 77, the reset spring 73 is compressed and stores elastic potential energy, at the same time, the connecting arm one 741 drives the two movable tongs 3 to slide along the support seat 2 towards each other through the lifting rod 4, the movable tongs 3 are quickly clamped on the elevator guide rail, and the elevator is rapidly braked by means of friction, in this process, the corrugated rubber sleeve 753 of the foreign matter prevention assembly 75 is compressed synchronously with the sliding of the reset block 72, a sealing protection barrier is formed to block foreign matters from invading the sliding pair of the reset rod 71, the laser range finder 763 of the stroke monitoring assembly 76 collects distance data between the support block one 761 and the support block two 762 in real time, and accurately feeds back the sliding stroke of the reset block 72 and the clamping degree of the movable tongs 3, after the elevator fault is eliminated, the tension of the steel wire rope disappears, the reset spring 73 releases the stored elastic potential energy, and drives the reset block 72 to slide reversely along the reset rod 71 to the initial position, the reset block 72 drives the movable tongs 3 to reset synchronously through the support arm 743, the connecting arm one 741 and the lifting rod 4, the movable tongs 3 are separated from the elevator guide rail and restored to the open state, in this reset process, the nested dustproof sleeve one 764, two and three are synchronously extended and retracted with the movement of the support block two 762, and the detection light path of the laser range finder 763 is always protected, so that accurate data feedback is ensured, the whole working cycle does not need manual intervention, the automatic response and reset of the safety tongs are realized, and the safety and maintenance efficiency of the elevator operation are effectively ensured.

[0053] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. An automatic reset safety clamp, comprising a safety clamp body (1), characterized in that: The safety clamp body (1) is provided with a mounting bracket (8), and the mounting bracket (8) is provided with two symmetrical support seats (2). The two ends of the support seats (2) are slidably connected to the safety clamp body (1). Movable clamps (3) are slidably connected to the two support seats (2). A lifting rod (4) is installed between the two movable clamps (3). A lifting head (5) is fixed at the end of the lifting rod (4) away from the two movable clamps (3). A wire rope connecting frame (6) is provided on one side of the safety clamp body (1). A connection and reset mechanism (7) is provided between the wire rope connecting frame (6) and the lifting head (5).

2. The automatic reset safety clamp according to claim 1, characterized in that: The connection reset mechanism (7) includes a connecting seat (77) fixed on the safety clamp body (1), a reset rod (71) fixed on the connecting seat (77), a reset block (72) slidably connected on the reset rod (71), a reset spring (73) provided between the reset block (72) and the end of the reset rod (71) away from the connecting seat (77), an anti-foreign object component (75) provided on the reset rod (71), a travel monitoring component (76) provided on one side of the reset rod (71), and a connecting component (74) provided between the reset block (72) and the lifting head (5) and the wire rope connecting frame (6).

3. The automatic reset safety clamp according to claim 2, characterized in that: The connecting assembly (74) includes a connecting arm one (741) fixed on the lifting head (5), a connecting arm two (742) fixed on the connecting arm one (741), a support arm (743) fixed at the end of the connecting arm one (741) near the connecting arm two (742), the support arm (743) being fixedly connected to the reset block (72), and the wire rope connecting frame (6) being fixedly connected to the end of the connecting arm two (742) away from the connecting arm one (741).

4. The automatic reset safety clamp according to claim 3, characterized in that: A limiting arm (744) is fixed on the connecting seat (77), and a limiting groove is formed on the limiting arm (744). The connecting arm (741) passes through the limiting groove on the limiting arm (744) and moves within the limiting groove.

5. The automatic reset safety clamp according to claim 3, characterized in that: The connecting arm (741) is provided with inclined surfaces in the direction of movement, and the inclined surfaces provided on the connecting arm (741) correspond to the limiting grooves of the limiting arm (744).

6. The automatic reset safety clamp according to claim 2, characterized in that: The foreign object prevention component (75) includes two symmetrical support rings (751) fixed on the reset block (72). Both ends of the reset rod (71) are fixed with support rings (752). A corrugated rubber sleeve (753) is provided between the support rings (751) and the support rings (752). Both ends of the corrugated rubber sleeve (753) are fixedly connected to the support rings (751) and the support rings (752). A vent hole is provided on the support rings (752).

7. The automatic reset safety clamp according to claim 6, characterized in that: The travel monitoring component (76) includes a support block 1 (761) disposed on one side of the reset rod (71). The support block 1 (761) is fixedly connected to a support ring 2 (752) near the reset spring (73). The support block 2 (762) is disposed on one side of the reset rod (71). The support block 2 (762) is fixedly connected to the corresponding support ring 1 (751). A laser rangefinder (763) is fixed on the support block 1 (761). The output end of the laser rangefinder (763) faces the support block 2 (762).

8. The automatic reset safety clamp according to claim 7, characterized in that: A dustproof sleeve (764) is fixed on the support block (761). The laser rangefinder (763) is located inside the dustproof sleeve (764). A dustproof sleeve (765) is slidably connected to the end of the dustproof sleeve (764) near the support block (762). A dustproof sleeve (766) is slidably connected to the end of the dustproof sleeve (765) near the support block (762). The end of the dustproof sleeve (766) away from the dustproof sleeve (765) is fixedly connected to the support block (762).

9. The automatic reset safety clamp according to claim 1, characterized in that: The mounting bracket (8) is provided with two symmetrical pads (9). The pads (9) abut against the support base (2) and the mounting bracket (8). The side of the pads (9) near the mounting bracket (8) is arc-shaped.

10. The automatic reset safety clamp according to claim 9, characterized in that: The mounting bracket (8) is a U-shaped spring. The mounting bracket (8) is fixedly connected to the safety clamp body (1) by at least three fixing bolts. The mounting holes of the safety clamp body (1) near the mounting bracket (8) at both ends are elongated. An adjusting bolt (10) is fixed on the side of the support base (2) away from the movable clamp (3). The adjusting bolt (10) passes through the pad (9), the mounting bracket (8) and the safety clamp body (1), and the hole passing through the safety clamp body (1) is elongated. An adjusting nut is threaded to the end of the adjusting bolt (10) away from the support base (2).

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