Elevator maintenance safety device

Abstract

The invention relates to an elevator maintenance safety device, which belongs to the technical field of elevator equipment.The elevator maintenance safety device comprises a mounting bracket, a protective bracket hinged to the exterior of the mounting bracket and a steel wire guide wheel rotationally arranged in the mounting bracket, and a first mounting groove and a second mounting groove are respectively formed in the mounting bracket; the steel wire guide wheel bearing is installed in the first installation groove, an installation table located below the protection support is fixed to the outer portion of the installation support, and a trigger mechanism is arranged on the installation table. And the cleaning structure comprises a scraping block which is arranged in the second mounting groove and is positioned below the steel wire guide wheel. According to the elevator maintenance safety device, automatic response can be carried out through the trigger mechanism when maintenance personnel operate mistakenly or equipment is abnormal, the accident risk is reduced, the cleaning structure automatically scrapes oil stains or dust on the surface of the steel wire guide wheel after being triggered, a steel wire rope is prevented from being stuck or slipping, the operation stability is improved, and the manual cleaning frequency is reduced; the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator equipment, and particularly to an elevator maintenance safety device. Background Art

[0002] As a modern mechanical transportation tool, the lift elevator has become one of the essential devices in people's daily lives and is widely used in shopping malls, high-rise office buildings, and high-rise residential buildings. However, as a transportation tool, the elevator travels between high floors and the ground, and it has certain dangers. Therefore, it needs to be regularly inspected and maintained to ensure the normal operation of the elevator and guarantee the safety of passengers.

[0003] After retrieval, the patent document with the publication number CN214217829U discloses an elevator maintenance safety device, which includes an elevator hoistway. Support crossbeams are provided on the opposite side walls of the elevator hoistway. A protective bracket is hinged on the support crossbeam, and the protective bracket can rotate around its hinge point with the support crossbeam to a position parallel or perpendicular to the elevator hoistway. An electric shock switch for controlling the opening and closing of the electrical circuit of the elevator is provided on the side wall of the support crossbeam. When the protective bracket and the elevator hoistway are in a vertical state, the electric shock switch can be squeezed and triggered. A pulling mechanism for pulling the protective bracket to rotate is provided in the elevator hoistway. This application has the effect of reducing the possibility of falling during elevator maintenance.

[0004] However, the above patent still has the following defects: For example, there is a lack of equipment for cleaning the wire guide wheel. In the current design of elevator maintenance safety devices, the rotating wheel, as a guiding component of the steel wire rope, is exposed to the elevator hoistway environment for a long time, and the surface or bearing of the rotating wheel is contaminated, resulting in jamming or an increase in rotational resistance, affecting the smooth retraction and extension of the steel wire rope. Moreover, hard particles remain in the groove of the rotating wheel, which will rub against the steel wire rope and accelerate its wear. As a result, the service life of the steel wire rope is shortened, there is a risk of fracture, and the reliability of the protective barrier is reduced.

[0005] In view of this, an elevator maintenance safety device is proposed to solve the problems described above. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides an elevator maintenance safety device, which has the advantages of automatic cleaning and lubrication functions, etc., and solves the problem that the surface of the rotating wheel is easily contaminated when it is exposed to the elevator hoistway environment for a long time, resulting in jamming or an increase in rotational resistance, affecting the smooth retraction and extension of the steel wire rope.

[0007] To achieve the above object, the present invention provides the following technical solution: An elevator maintenance safety device includes a mounting bracket, a protective bracket hinged to the outside of the mounting bracket, and a wire guide wheel rotatably arranged inside the mounting bracket. A first mounting groove and a second mounting groove are respectively formed inside the mounting bracket. The wire guide wheel is installed by bearings in the first mounting groove. An installation table is fixed to the outside of the mounting bracket and located below the protective bracket. A triggering mechanism is arranged on the installation table. A driving mechanism is arranged inside the second mounting groove. A cleaning structure for cooperating with the driving mechanism to clean the wire guide wheel is arranged inside the first mounting groove;

[0008] The triggering mechanism consists of a triggering component arranged on the installation table and a piston part fixed to the upper surface of the installation table. A communicating pipe is arranged between the piston part and the driving mechanism;

[0009] The triggering component includes a guide rod slidably penetrating through the inside of the installation table, a circular table fixed to the top end of the guide rod, and a pressure contact block fixed to the upper surface of the circular table;

[0010] The driving mechanism includes a piston cylinder fixed to the bottom wall inside the second mounting groove, a piston block reciprocatingly arranged inside the piston cylinder, a first piston rod arranged above the piston block, a second piston rod rotatably arranged at the top end of the first piston rod, and a pushing structure arranged at the top end of the second piston rod and connected to the cleaning structure. The end of the communicating pipe away from the piston part is fixedly communicated with the lower surface of the piston cylinder;

[0011] The cleaning structure includes a scraping block arranged inside the second mounting groove and located below the wire guide wheel.

[0012] By adopting the above technical solution in this application, the triggering mechanism can automatically respond for power-off processing when maintenance personnel make misoperations or equipment malfunctions, reducing accident risks. The cleaning structure automatically scrapes off the oil stains or dust on the surface of the wire guide wheel after being triggered, avoiding the slipping or jamming of the wire rope, improving the running stability, reducing the manual cleaning frequency, and lowering the maintenance cost.

[0013] Furthermore, two pushing arms are symmetrically arranged on the outer surface of the circular table. Both of the two pushing arms are hinged to the outer surface of the circular table. One end of one of the pushing arms is hinged with a sliding seat. A docking rod is detachably installed on the outer surface of the sliding seat. The end of the other pushing arm away from the circular table extends into the piston part and is hinged with the piston on the piston part.

[0014] The beneficial effect of adopting the above further solution is that through the symmetric hinge of the two pushing arms, when the circular table is pressed and moves downward, the two pushing arms act simultaneously, forming a two-way linkage, ensuring that the response of the triggering mechanism is faster and more reliable. One pushing arm drives the sliding seat to slide, and the other pushing arm directly acts on the piston part, realizing dual power transmission and reducing the risk of jamming.

[0015] Further, a first return spring surrounding the outside of the guide rod is fixed between the circular table and the mounting table, and a steel wire rope that fits the outer surface of the wire guide wheel is hooked to the upper surface of the protective bracket.

[0016] The beneficial effect of adopting the above further solution is that the circular table returns to its original position immediately after the pressure is released through the first return spring, ensuring that the triggering mechanism quickly resumes the standby state, realizing continuous safety monitoring. The design of the spring surrounding the guide rod ensures accurate reset trajectory and avoids deviation and jamming, realizing the automatic reset function and guaranteeing continuous protection.

[0017] Further, a chute is opened inside the mounting table, the sliding seat is slidably mounted in the chute, and the pressure contact block is an electric shock switch.

[0018] The beneficial effect of adopting the above further solution is that the chute provides an accurate linear motion track for the sliding seat, eliminates lateral shaking, ensures the power transmission efficiency of the push arm, and the pressure contact block realizes the circuit cut-off response and integrates the overload protection function, automatically cutting off the power when the pressure exceeds the threshold.

[0019] Further, the second plug rod and the first plug rod are distributed vertically, the first plug rod penetrates inside the piston block, and the piston block is rotatably connected to the first plug rod.

[0020] The beneficial effect of adopting the above further solution is that when the protective bracket is subjected to a large lateral external force, the triggering mechanism drives the piston block to move. Through the rotational connection between the first plug rod and the second plug rod, the cleaning structure can more accurately respond and clean the debris accumulation part on the wire guide wheel that may be generated by the external force.

[0021] Further, the pushing structure includes a pushing seat fixed to the top end of the second plug rod, a connecting block fixed to the lower surface of the scraping block, and a connecting rod fixed to the outer surface of the connecting block. A roller is installed at the end of the connecting rod far from the connecting block by means of a bearing.

[0022] The beneficial effect of adopting the above further solution is that the air pressure enters the piston cylinder through the connecting pipe. The air pressure pushes the piston block to move upward, driving the first plug rod and the second plug rod to move. The pushing seat at the top end of the second plug rod cooperates with the roller through the rolling groove, converting the linear motion into the lateral movement of the scraping block. The scraping block scrapes along the surface of the wire guide wheel to remove dirt, ensuring the smooth operation of the steel wire rope.

[0023] Further, a rolling groove adapted to the roller is opened inside the pushing seat, and the rolling groove is arc-shaped and inclined.

[0024] The beneficial effects of adopting the above further solution are as follows: The arc design of the rolling groove can guide the roller to move along a specific arc path. In the elevator maintenance safety device, when the second plug rod rotates to drive the pushing seat to move, the roller rolls in the rolling groove, enabling the connecting rod and the scraping block to move along a predetermined arc trajectory.

[0025] Furthermore, the cleaning structure further includes a limiting rod fixed to the outer surface of the scraping block and extending into the second installation groove, and a second return spring fixed between the scraping block and the inner wall of the second installation groove.

[0026] The beneficial effects of adopting the above further solution are as follows: By extending the limiting rod into the second installation groove, a clear positioning reference is provided for the movement of the scraping block. When the elevator maintenance safety device is working, after the scraping block completes the cleaning action on the wire guide wheel, the limiting rod will contact the inner wall of the second installation groove, causing the scraping block to accurately return to its initial position.

[0027] Furthermore, a lubricating structure for lubricating the inside of the piston cylinder is provided at the bottom end of the first plug rod. The lubricating structure includes a liquid storage box detachably installed at the bottom end of the first plug rod and a resistance plate arranged outside the liquid storage box. An outlet is formed inside the liquid storage box, and a shielding plate is slidably arranged in the outlet. A cushion block is threadedly installed between the resistance plate and the shielding plate.

[0028] The beneficial effects of adopting the above further solution are as follows: When the first plug rod makes a reciprocating motion in the piston cylinder, along with the movement process, the lubricating oil can flow out through the outlet to continuously lubricate the inner wall of the piston cylinder and the outer surface of the first plug rod. Continuous lubrication can reduce the friction between the piston cylinder and the first plug rod, reduce the degree of wear, and ensure the normal operation of the driving mechanism.

[0029] Furthermore, a guiding groove for the shielding plate is formed inside the outlet. An elastic rod for driving the first plug rod is arranged on the upper surface of the piston cylinder. A ball is hinged at the end of the elastic rod, and a spiral groove adapted to the ball is formed inside the first plug rod, and the spiral groove is arranged in a spiral shape.

[0030] The beneficial effects of adopting the above further solution are as follows: The guiding groove provides an accurate movement trajectory for the shielding plate. When it is necessary to adjust the position of the shielding plate in the outlet to control the outflow rate of the lubricating oil, the guiding groove can ensure that the shielding plate can only move along a predetermined direction without deviation or shaking. When adjusting the position of the shielding plate by rotating the cushion block, the guiding function of the guiding groove can make the shielding plate accurately move to the required position, ensuring that the opening area of the outlet is accurately controllable, thereby realizing the precise supply of lubricating oil.

[0031] Compared with the prior art, the present invention provides an elevator maintenance safety device, which has the following beneficial effects:

[0032] 1. The elevator maintenance safety device has a triggering mechanism that responds to both mechanical linkage and electrical signals to ensure timely power-off during maintenance. The cleaning structure automatically removes foreign objects on the wire guide pulley after being triggered, avoiding slipping or jamming. At the same time, the lubricating structure lubricates synchronously during the piston movement, reducing wear and extending the life of components.

[0033] 2. For the elevator maintenance safety device, the rotational force of the second plug rod can be more effectively transmitted to the scraping block through the inclined rolling groove. When the second plug rod rotates, the pushing seat moves accordingly. The roller is subjected to the acting force of the inclined groove wall in the rolling groove, and this acting force can be decomposed into component forces in the horizontal and vertical directions and transmitted to the scraping block through the connecting rod, enabling the scraping block to obtain a greater cleaning force. When cleaning stubborn debris, this efficient force transmission allows the scraping block to scrape the debris more powerfully.

[0034] 3. The elevator maintenance safety device has a liquid storage box that is detachably installed at the bottom end of the first plug rod and can store a certain amount of lubricating oil inside. When the first plug rod reciprocates in the piston cylinder, the lubricating oil can flow out through the liquid outlet along with the movement process, continuously lubricating the inner wall of the piston cylinder and the outer surface of the first plug rod. Continuous lubrication can reduce the friction between the piston cylinder and the first plug rod, reduce the degree of wear, and ensure the normal operation of the driving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a structural sectional view of an elevator maintenance safety device of the present invention;

[0036] Figure 2 is a structural schematic diagram of the triggering mechanism in an elevator maintenance safety device of the present invention;

[0037] Figure 3 is in an elevator maintenance safety device of the present invention Figure 2 is an enlarged structural schematic diagram of A shown;

[0038] Figure 4 is a structural schematic diagram of the driving mechanism in an elevator maintenance safety device of the present invention;

[0039] Figure 5 is a structural schematic diagram of the cleaning structure in an elevator maintenance safety device of the present invention;

[0040] Figure 6 is a structural sectional view of the piston cylinder in an elevator maintenance safety device of the present invention;

[0041] Figure 7 is a structural schematic diagram of the lubricating structure in an elevator maintenance safety device of the present invention;

[0042] Figure 8 is in an elevator maintenance safety device of the present inventionFigure 7 Schematic enlarged structure diagram of B shown

[0043] In the figure: 1. Mounting bracket; 11. First mounting groove; 12. Second mounting groove; 2. Wire guide pulley; 3. Protection bracket; 4. Mounting table; 5. Trigger mechanism; 501. Trigger assembly; 5011. Guide rod; 5012. Circular table; 5013. Pressure contact block; 5014. Pushing arm; 5015. Slide base; 5016. Chute; 5017. First return spring; 502. Piston part; 503. Connecting pipe; 504. Docking rod; 6. Driving mechanism; 601. Piston cylinder; 602. Piston block; 603. First piston rod; 604. Second piston rod; 605. Pushing structure; 6051. Pushing seat; 6052. Connecting block; 6053. Connecting rod; 6054. Roller; 6055. Rolling groove; 606. Lubricating structure; 6061. Liquid storage box; 6062. Resistance plate; 6063. Liquid outlet; 6064. Shielding plate; 6065. Spacer block; 6066. Guide groove; 607. Elastic rod; 608. Ball; 609. Spiral groove; 7. Cleaning structure; 701. Scraping block; 702. Limiting rod; 703. Second return spring. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Please refer to Figures 1 to 8 , an elevator maintenance safety device in this embodiment includes a mounting bracket 1, a protection bracket 3 hinged to the outside of the mounting bracket 1, and a wire guide pulley 2 rotatably arranged inside the mounting bracket 1. A first mounting groove 11 and a second mounting groove 12 are respectively formed inside the mounting bracket 1. The wire guide pulley 2 is installed by bearings in the first mounting groove 11. A steel wire rope that fits the outer surface of the wire guide pulley 2 is hooked on the upper surface of the protection bracket 3. A mounting table 4 is fixed outside the mounting bracket 1 and located below the protection bracket 3. It should be noted that the number of both the mounting bracket 1 and the protection bracket 3 is two, and the two protection brackets 3 and the two mounting brackets 1 are symmetrically arranged. The number of wire guide pulleys 2 on the mounting bracket 1 is at least two.

[0046] In order to improve the safety of elevator maintenance, a trigger mechanism 5 is provided on the mounting platform 4, a driving mechanism 6 is provided inside the second mounting groove 12, and a cleaning structure 7 is provided inside the first mounting groove 11 to cooperate with the driving mechanism 6 to clean the wire guide wheel 2; specifically, the trigger mechanism 5 is composed of a trigger assembly 501 provided on the mounting platform 4 and a piston member 502 fixed on the upper surface of the mounting platform 4, and a connecting pipe 503 is provided between the piston member 502 and the driving mechanism 6; the connecting pipe 503 is made of a high-pressure resistant material. Among them, the trigger assembly 501 includes a guide rod 5011 sliding through the interior of the mounting platform 4, a circular platform 5012 fixed on the top of the guide rod 5011, and a pressure contact block 5013 fixed on the upper surface of the circular platform 5012. A first return spring 5017 surrounding the outside of the guide rod 5011 is fixed between the circular platform 5012 and the mounting platform 4. The first reset spring 5017 allows the circular platform 5012 to return to its original position immediately after the pressure is released, ensuring that the trigger mechanism 5 quickly returns to the standby state and realizes continuous safety monitoring. The design of the spring surrounding the guide rod 5011 ensures the accuracy of the reset trajectory, avoids deflection and jamming, and realizes the automatic reset function to ensure continuous protection.

[0047] It should be noted that two push arms 5014 are symmetrically arranged on the outer surface of the circular platform 5012. Both push arms 5014 are hinged to the outer surface of the circular platform 5012. A slide seat 5015 is hinged at the end of one of the push arms 5014. A docking rod 504 is detachably mounted on the outer surface of the slide seat 5015. Another push arm 5014 extends away from one end of the circular platform 5012 into the interior of the piston member 502 and is hinged to the piston on the piston member 502. The piston on the piston member 502 is provided with a valve. In this embodiment, the two push arms 5014 are symmetrically hinged. When the circular platform 5012 is pressed and moved downward, the two push arms 5014 act simultaneously to form a two-way linkage, ensuring that the response of the trigger mechanism 5 is faster and more reliable. One push arm 5014 drives the slide seat 5015 to slide, and the other push arm 5014 directly acts on the piston member 502, realizing dual power transmission and reducing the risk of jamming. The mounting platform 4 is provided with a slide groove 5016 inside which the slide seat 5015 is slidably mounted. The slide groove 5016 provides a precise linear motion track for the slide seat 5015, thereby eliminating lateral shaking and ensuring the power transmission efficiency of the push arm 5014. The pressure contact block 5013 is an electric contact switch, and the pressure contact block 5013 realizes a circuit cut-off response integrated overload protection function, and automatically cuts off the power when the pressure exceeds the threshold.

[0048] In this embodiment, the driving mechanism 6 includes a piston cylinder 601 fixed to the inner bottom wall of the second installation groove 12, a piston block 602 reciprocatingly arranged inside the piston cylinder 601, a first piston rod 603 arranged above the piston block 602, a second piston rod 604 rotatably connected to the top end of the first piston rod 603, and a pushing structure 605 arranged at the top end of the second piston rod 604 and connected to the cleaning structure 7. One end of the connecting pipe 503 far from the piston member 502 is fixedly communicated with the lower surface of the piston cylinder 601; the second piston rod 604 and the first piston rod 603 are distributed vertically, the first piston rod 603 penetrates through the inside of the piston block 602, and the piston block 602 is rotatably connected to the first piston rod 603. When the protective bracket 3 is subjected to a large lateral external force, the triggering mechanism 5 drives the piston block 602 to move. Through the rotational connection between the first piston rod 603 and the second piston rod 604, the cleaning structure 7 can more accurately respond to and clean the parts where debris may accumulate on the wire guide wheel 2 due to external forces. Specifically, the pushing structure 605 includes a pushing seat 6051 fixed to the top end of the second piston rod 604, a connecting block 6052 fixed to the lower surface of the scraping block 701, and a connecting rod 6053 fixed to the outer surface of the connecting block 6052. One end of the connecting rod 6053 far from the connecting block 6052 is installed with a roller 6054 by means of a bearing.

[0049] It should be noted that a rolling groove 6055 adapted to the roller 6054 is provided inside the pushing seat 6051, and the rolling groove 6055 is arc-shaped and inclined. The arc-shaped design of the rolling groove 6055 can guide the roller 6054 to move along a specific arc path. In the elevator maintenance safety device, when the second piston rod 604 rotates to drive the pushing seat 6051 to move, the roller 6054 rolls in the rolling groove 6055, so that the connecting rod 6053 and the scraping block 701 can move along a predetermined arc trajectory.

[0050] To increase the displacement of the piston block 602, a lubricating structure 606 for lubricating the inside of the piston cylinder 601 is provided at the bottom end of the first piston rod 603. The lubricating structure 606 includes a liquid storage box 6061 detachably installed at the bottom end of the first piston rod 603 and a resistance plate 6062 arranged outside the liquid storage box 6061. An outlet 6063 is provided inside the liquid storage box 6061, and a shielding plate 6064 is slidably arranged in the outlet 6063. A spacer block 6065 is installed between the resistance plate 6062 and the shielding plate 6064 by means of a thread. When the first piston rod 603 reciprocates in the piston cylinder 601, as the movement progresses, the lubricating oil can flow out through the outlet 6063 to continuously lubricate the inner wall of the piston cylinder 601 and the outer surface of the first piston rod 603. The continuous lubrication can reduce the friction between the piston cylinder 601 and the first piston rod 603, reduce the wear degree, and ensure the normal operation of the driving mechanism 6.

[0051] It is worth mentioning that effective lubrication can significantly reduce the wear between the piston cylinder 601 and the first piston rod 603, extending the service life of these two components. Due to the reduced friction, the surface damage of the components is reduced, and problems such as the decrease in dimensional accuracy and the increase in mating clearance caused by wear are minimized, thus ensuring the long-term stable operation of the driving mechanism 6.

[0052] In this embodiment, a guide groove 6066 for the use of the baffle 6064 is provided in the liquid outlet 6063. An elastic rod 607 for driving the first piston rod 603 is arranged on the upper surface of the piston cylinder 601. A ball 608 is hinged to the end of the elastic rod 607. A spiral groove 609 adapted to the ball 608 is provided inside the first piston rod 603. Specifically, the spiral groove 609 is arranged in a spiral shape. The guide groove 6066 provides an accurate movement trajectory for the baffle 6064. When it is necessary to adjust the position of the baffle 6064 in the liquid outlet 6063 to control the outflow rate of the lubricating oil, the guide groove 6066 can ensure that the baffle 6064 can only move along a predetermined direction without deviation or shaking. When adjusting the position of the baffle 6064 by rotating the spacer 6065, the guiding effect of the guide groove 6066 can make the baffle 6064 accurately move to the required position, ensuring that the opening area of the liquid outlet 6063 is accurately controllable, thereby realizing the precise supply of the lubricating oil.

[0053] In addition, the spiral shape of the spiral groove 609 enables the movement speed and stroke of the first piston rod 603 to be adjusted as needed. By changing the elastic force of the elastic rod 607 or adjusting parameters such as the pitch of the spiral groove 609, different movement effects can be achieved. This adaptability enables the device to better adapt to different working environments and working requirements, improving the versatility and reliability of the device.

[0054] In this embodiment, the cleaning structure 7 includes a scraping block 701 disposed inside the second installation groove 12 and below the wire guide wheel 2. The cleaning structure 7 further includes a limiting rod 702 fixed to the outer surface of the scraping block 701 and extending into the second installation groove 12, and a second return spring 703 fixed between the scraping block 701 and the inner wall of the second installation groove 12. By extending the limiting rod 702 into the second installation groove 12, a clear positioning reference is provided for the movement of the scraping block 701. When the elevator maintenance safety device is working, after the scraping block 701 completes the cleaning action on the wire guide wheel 2, the limiting rod 702 will contact the inner wall of the second installation groove 12, causing the scraping block 701 to accurately return to its initial position. When this embodiment is in use, air pressure enters the piston cylinder 601 through the connecting pipe 503. The air pressure pushes the piston block 602 upward, driving the first piston rod 603 and the second piston rod 604 to move. The pushing seat 6051 at the top of the second piston rod 604 cooperates with the roller 6054 through the rolling groove 6055, converting the linear motion into the lateral movement of the scraping block 701. The scraping block 701 scrapes along the surface of the wire guide wheel 2 to remove dirt, ensuring the smooth operation of the wire rope.

[0055] In addition, due to the positioning of the limiting rod 702 and the reset function of the second return spring 703, the starting position and movement trajectory of the scraping block 701 for each cleaning of the wire guide wheel 2 can be kept consistent. This makes the cleaning effect more stable each time, capable of evenly removing the debris on the surface of the wire guide wheel 2, and avoiding problems such as incomplete cleaning or local over-cleaning caused by the position deviation of the scraping block 701.

[0056] The working principle of the above embodiment is as follows:

[0057] The protective bracket 3 is unfolded during maintenance through the hinge structure to prevent personnel from falling. The wire rope thereon fits with the wire guide wheel 2. When the triggering mechanism 5 acts, it can be emergently braked. When the maintenance personnel or equipment apply pressure to the circular platform 5012, the guide rod 5011 moves downward, compressing the first return spring 5017, and the pressure contact block 5013 contacts the installation platform 4 to trigger a signal for power-off;

[0058] At the same time, the push arms 5014 are linked. One of the push arms 5014 drives the slide seat 5015 to slide, and the other push arm 5014 drives the piston in the piston member 502 to move, causing air pressure to enter the piston cylinder 601 through the connecting pipe 503. The air pressure pushes the piston block 602 upward, driving the first piston rod 603 and the second piston rod 604 to move. The pushing seat 6051 at the top of the second piston rod 604 cooperates with the roller 6054 through the rolling groove 6055, converting the linear motion into the lateral movement of the scraping block 701. The scraping block 701 scrapes along the surface of the wire guide wheel 2 to remove dirt, ensuring the smooth operation of the wire rope. The limiting rod 702 and the second return spring 703 ensure the reset of the scraping block 701;

[0059] Through the cooperation of the spiral groove 609 and the ball 608, the first plug rod 603 rotates. When the first plug rod 603 moves, it drives the liquid storage box 6061 to move. The resistance plate 6062 is pushed by the fluid resistance to drive the cushion block 6065, so that the shielding plate 6064 opens the liquid outlet 6063, releasing the lubricant to the inner wall of the piston cylinder 601.

[0060] The installation method, connection method or setting method disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can realize the control of the electrical components through simple programming, and the existing publicly disclosed power connection technology also belongs to the common knowledge in this field. Therefore, the specific structural composition and working principle will not be elaborated too much in this embodiment.

[0061] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator maintenance safety device, comprising a mounting bracket (1), a protective bracket (3) hinged to the outside of the mounting bracket (1), and a wire guide wheel (2) rotatably arranged inside the mounting bracket (1), characterized in that: The installation bracket (1) is internally provided with a first installation groove (11) and a second installation groove (12) respectively. The wire guide wheel (2) is installed in the first installation groove (11) by bearings. An installation platform (4) located below the protective bracket (3) is fixed to the outside of the installation bracket (1). A trigger mechanism (5) is arranged on the installation platform (4). A driving mechanism (6) is arranged inside the second installation groove (12). A cleaning structure (7) for cleaning the wire guide wheel (2) in cooperation with the driving mechanism (6) is arranged inside the first installation groove (11). The trigger mechanism (5) is composed of a trigger component (501) arranged on the installation platform (4) and a piston member (502) fixed to the upper surface of the installation platform (4). A communication pipe (503) is arranged between the piston member (502) and the driving mechanism (6). The trigger component (501) includes a guide rod (5011) slidably penetrating through the inside of the installation platform (4), a circular platform (5012) fixed to the top end of the guide rod (5011), and a pressure contact block (5013) fixed to the upper surface of the circular platform (5012). The driving mechanism (6) includes a piston cylinder (601) fixed to the inner bottom wall of the second installation groove (12), a piston block (602) reciprocatingly arranged inside the piston cylinder (601), a first piston rod (603) arranged above the piston block (602), a second piston rod (604) rotatably arranged at the top end of the first piston rod (603), and a pushing structure (605) arranged at the top end of the second piston rod (604) and connected to the cleaning structure (7). The end of the communication pipe (503) far from the piston member (502) is fixedly communicated with the lower surface of the piston cylinder (601). The cleaning structure (7) includes a scraping block (701) arranged inside the second installation groove (12) and located below the wire guide wheel (2).

2. The elevator maintenance safety device according to claim 1, wherein: Two pushing arms (5014) are symmetrically arranged on the outer surface of the circular platform (5012). Both of the two pushing arms (5014) are hinged to the outer surface of the circular platform (5012). One end of one of the pushing arms (5014) is hinged with a sliding seat (5015). A docking rod (504) is detachably installed on the outer surface of the sliding seat (5015). The end of the other pushing arm (5014) far from the circular platform (5012) extends into the piston member (502) and is hinged with the piston on the piston member (502).

3. An elevator maintenance safety device according to claim 1, characterized in that: A first return spring (5017) surrounding the outside of the guide rod (5011) is fixed between the circular platform (5012) and the installation platform (4). A steel wire rope that fits the outer surface of the wire guide wheel (2) is hooked on the upper surface of the protective bracket (3).

4. An elevator maintenance safety device according to claim 2, wherein: A chute (5016) is opened inside the installation platform (4). The sliding seat (5015) is slidably installed in the chute (5016). The pressure contact block (5013) is an electric contact switch.

5. The elevator maintenance safety device according to claim 1, characterized in that: The second piston rod (604) and the first piston rod (603) are distributed up and down. The first piston rod (603) penetrates through the inside of the piston block (602). The piston block (602) is rotatably connected to the first piston rod (603).

6. The elevator maintenance safety device according to claim 1, characterized in that: The pushing structure (605) includes a pushing seat (6051) fixed to the top end of the second plug rod (604), a connecting block (6052) fixed to the lower surface of the scraping block (701), and a connecting rod (6053) fixed to the outer surface of the connecting block (6052). A roller (6054) is installed at one end of the connecting rod (6053) away from the connecting block (6052) by means of a bearing.

7. An elevator maintenance safety device according to claim 6, characterized in that: A rolling groove (6055) adapted to the roller (6054) is formed inside the pushing seat (6051). The rolling groove (6055) is arc-shaped and inclined.

8. The elevator maintenance safety device according to claim 1, characterized in that: The cleaning structure (7) further includes a limiting rod (702) fixed to the outer surface of the scraping block (701) and extending into the second installation groove (12), and a second return spring (703) fixed between the scraping block (701) and the inner wall of the second installation groove (12).

9. The safety device for elevator maintenance according to claim 1, characterized in that: A lubricating structure (606) for lubricating the inside of the piston cylinder (601) is provided at the bottom end of the first plug rod (603). The lubricating structure (606) includes a liquid storage box (6061) detachably installed at the bottom end of the first plug rod (603), and a resistance plate (6062) provided outside the liquid storage box (6061). A liquid outlet (6063) is formed inside the liquid storage box (6061). A shielding plate (6064) is slidably arranged in the liquid outlet (6063). A cushion block (6065) is installed between the resistance plate (6062) and the shielding plate (6064) by means of a thread.

10. The elevator maintenance safety device according to claim 9, characterized in that: A guiding groove (6066) for the shielding plate (6064) is formed in the liquid outlet (6063). An elastic rod (607) for driving the first plug rod (603) is provided on the upper surface of the piston cylinder (601). A ball (608) is hinged to the end of the elastic rod (607). A spiral groove (609) adapted to the ball (608) is formed inside the first plug rod (603). The spiral groove (609) is spiral-shaped.

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