High-falling prevention self-locking device for aerial work safety protection

Abstract

The utility model provides a kind of high fall prevention self-locking device for aerial work safety protection belongs to aerial work safety protection technical field, this high fall prevention self-locking device for aerial work safety protection includes nine main components of device main body, guide slide rail, sliding block, self-locking mechanism, locking claw, spring mechanism, safety rope connecting point, release handle and mounting bracket, through the mechanical engagement locking mechanism of locking claw and guide slide rail sawtooth groove, combined with the automatic response system of spring drive, the instantaneous self-locking function when bearing downward pulling force is realized, while maintaining the operational flexibility of parallel movement, solve the technical problem that aerial work mobile device lacks reliable self-locking mechanism in prior art;Device adopts pure mechanical structure design, without external power source, realize manual unlocking control by release handle, provide safe and reliable anti-falling protection for aerial work personnel, effectively improve the safety and operation efficiency of aerial work.

Description

Technical Field

[0001] This utility model belongs to the field of high-altitude operation safety protection technology, specifically, it relates to a fall-prevention self-locking device for high-altitude operation safety protection. Background Technology

[0002] In existing technologies, workers performing high-altitude operations, such as construction, equipment maintenance, and cleaning, need to move horizontally along building exteriors or structural surfaces. Traditional safety equipment mainly includes basic protective tools such as safety belts, safety ropes, and fixed anchor points. While these devices provide some safety, they are significantly inadequate in work environments requiring frequent movement. Most existing mobile safety devices use pulley systems or simple clamping mechanisms, lacking reliable automatic locking functions. When a worker accidentally slips or experiences a sudden downward pull, the device cannot lock in time, increasing the risk of fall. Furthermore, the locking mechanisms of existing devices often rely on manual operation or complex electronic control systems, resulting in long reaction times and insufficient reliability in emergencies. Electronic systems are also prone to malfunction in harsh high-altitude working environments. In addition, existing mobile devices often limit the worker's mobility and are complex to operate, impacting work efficiency. In other words, existing high-altitude mobile devices lack a rapid-response automatic locking mechanism, failing to provide reliable fall protection while ensuring mobility. Utility Model Content

[0003] In view of this, the present invention provides a self-locking device for preventing falls during high-altitude operations, which can solve the technical problem in the prior art that high-altitude operation devices lack a reliable self-locking mechanism and cannot automatically lock to prevent falls in unexpected situations.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a fall protection self-locking device for high-altitude operations, including a device body, a guide rail installed on the device body, a sliding block disposed in the guide rail, a self-locking mechanism connected to the sliding block, a locking pawl disposed in the self-locking mechanism, a spring mechanism cooperating with the locking pawl, a safety rope connection point connected to the device body, a release handle disposed on one side of the device body, and a mounting bracket installed at the bottom of the device body. The locking pawl engages with the serrated groove of the guide rail through the thrust of the spring mechanism and locks itself. When subjected to downward pulling force, the locking pawl automatically locks.

[0006] The technical effects of the self-locking device for preventing falls during high-altitude operations provided by this utility model are as follows: Through the meshing locking structure of the locking claw and the sawtooth groove of the guide rail, the automatic locking function is realized when subjected to downward pulling force, ensuring the safety of high-altitude workers. At the same time, it allows parallel movement within the guide rail, improving operational flexibility and safety.

[0007] Based on the above technical solution, the anti-fall self-locking device for high-altitude operation safety protection of this utility model can be further improved as follows:

[0008] The inner wall of the guide rail is provided with equally spaced serrated grooves, the inclination angle of which is 30° to 45°, and the depth of which is 1 / 3 to 1 / 2 of the thickness of the rail wall.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the specific tilt angle and depth design of the serrated groove ensures that the locking pawl can reliably engage and withstand sufficient tension, the tilt angle ensures the unidirectional locking, and the depth design ensures structural strength while avoiding excessive wear.

[0010] Furthermore, the shape of the sliding block matches the inner cavity shape of the guide rail, and the top of the sliding block has a mounting cavity to accommodate the self-locking mechanism. The depth of the mounting cavity is 1 / 2 to 2 / 3 of the height of the sliding block.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the precise matching between the sliding block and the guide rail ensures smooth movement; the design of the mounting cavity provides a stable mounting space for the self-locking mechanism; and the proportional design of the cavity depth ensures the installation strength without affecting the overall structure of the sliding block.

[0012] Furthermore, the self-locking mechanism includes a housing and a locking assembly disposed within the housing. The locking assembly includes a locking pawl and a connecting rod connected to the locking pawl. The connecting rod extends through the bottom of the housing into the interior of the sliding block.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the outer shell of the mechanism provides protection and positioning for the locking component, and the extension design of the connecting rod enables the locking pawl to connect with the external operating mechanism, ensuring that the self-locking mechanism can accurately respond to external control signals.

[0014] Furthermore, the locking pawl has a wedge-shaped structure, with a sharp front end for inserting into the serrated groove, and a spring seat connected to the rear end of the locking pawl. A compression spring is provided between the spring seat and the inner wall of the mechanism housing.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the wedge-shaped locking pawl structure provides the best meshing effect, the sharp front end ensures quick insertion into the serrated groove, and the spring seat design provides a stable support point for the compression spring, realizing a reliable elastic reset function.

[0016] Furthermore, the spring mechanism includes a compression spring and a spring seat. The spring constant of the compression spring is 500 N / m to 1200 N / m, and the length of the compression spring in the free state is 1.5 to 2 times the travel distance of the locking pawl.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the elastic coefficient range of the compression spring ensures that sufficient locking force is provided under normal use conditions, and the ratio between the spring length and the stroke of the locking pawl ensures that the spring is always within the effective elastic deformation range during operation.

[0018] Furthermore, the safety rope connection point is a ring structure, and the safety rope connection point is fixed to the geometric center of the main body of the device by welding. The inner diameter of the safety rope connection point is 8mm to 12mm.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the ring-shaped safety rope connection point provides a standardized safety rope connection interface, the installation position of the geometric center ensures uniform force distribution, the inner diameter size is compatible with standard safety rope specifications, and the welding fixing method ensures connection strength.

[0020] Furthermore, the release handle is connected to the main body of the device via a hinge shaft, and the end of the release handle is connected to the connecting rod of the locking pawl via a connecting rope. When the release handle is pulled, the locking pawl disengages from the serrated groove to unlock the device.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the release handle is connected by a hinge to achieve flexible operation, the connecting rope transmits the operating force to the locking pawl, realizes the unlocking function controlled manually, and provides the operator with the ability to actively control the status of the device.

[0022] Furthermore, the mounting bracket has a U-shaped structure, and the two support arms of the mounting bracket are connected to the bottom surface of the device body by bolts. The support arms are provided with mounting holes for fixing to the building structure.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the U-shaped mounting bracket provides a stable mounting foundation, the double-arm support design distributes the installation load, the bolt connection ensures reliable fixation between the bracket and the main body, and the mounting hole design adapts to the installation needs of different building structures.

[0024] Furthermore, the main body of the device is made of aluminum alloy, the surface of the guide rail is anodized, the sliding block is made of high-strength engineering plastic, and anti-loosening thread adhesive is provided at each connection part.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: aluminum alloy material provides lightweight and corrosion resistance, anodizing treatment enhances the wear resistance of guide rails, engineering plastic sliding blocks reduce frictional resistance, and anti-loosening thread adhesive ensures the reliability of connection for long-term use.

[0026] Compared with the prior art, the beneficial effects of the self-locking device for preventing falls during high-altitude operations provided by this utility model are as follows: This utility model achieves instantaneous locking when subjected to downward pulling force through the meshing locking mechanism of the locking claw and the sawtooth groove, combined with the spring-driven automatic locking system, while maintaining the flexibility of parallel movement. It effectively solves the technical problems of insufficient safety protection and excessive movement restrictions in high-altitude operations in the prior art, significantly improves the safety and efficiency of high-altitude operations, and provides reliable safety protection for workers. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a structural schematic diagram of a fall-prevention self-locking device for safety protection during high-altitude operations.

[0029] Figure 2 This is a schematic diagram of the internal structure of the guide rail;

[0030] Figure 3 This is a schematic diagram of an embodiment 2 of a fall-prevention self-locking device for safety protection during high-altitude operations;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Main body of the device; 2. Guide rail; 3. Sliding block; 4. Self-locking mechanism; 5. Locking claw; 6. Spring mechanism; 7. Safety rope connection point; 8. Release handle; 9. Mounting bracket; 10. Serrated groove; 11. Mechanism housing; 12. Locking assembly; 13. Connecting rod; 14. Spring seat; 15. Compression spring; 16. Mounting cavity; 17. Hinge shaft; 18. Connecting rope; 19. Support arm; 20. Mounting hole; 21. Bolt; 22. Inner cavity; 23. Sharp front end; 24. Wedge structure; 25. Welding point. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-2The diagram shows a structural schematic of a fall-prevention self-locking device for high-altitude work safety provided by this utility model. The overall structure includes core components such as the device body 1, guide rail 2, sliding block 3, self-locking mechanism 4, locking claw 5, spring mechanism 6, safety rope connection point 7, release handle 8, and mounting bracket 9. The device body 1 is made of high-strength aluminum alloy, which has good corrosion resistance and lightweight characteristics. The guide rail 2 is installed on the upper part of the body 1. The guide rail 2 is a hollow structure with a rectangular cross-section, and the dimensions of the inner cavity 22 are precisely matched with the shape of the sliding block 3. The inner sidewall of the guide rail 2 is provided with equally spaced serrated grooves 10. The inclination angle of the serrated grooves 10 is designed to be 30° to 45°. This angle design ensures that a reliable wedge-shaped locking effect is formed after the locking claw 5 is inserted. The depth of the serrated grooves 10 is 1 / 3 to 1 / 2 of the thickness of the rail wall, which ensures the meshing strength while avoiding excessive weakening of the rail structure. The sliding block 3 is installed in the inner cavity 22 of the guide rail 2. The sliding block 3 is made of high-strength engineering plastic with a smooth surface to reduce frictional resistance. The top of the sliding block 3 has a mounting cavity 16 for accommodating the self-locking mechanism 4. The cavity depth is 1 / 2 to 2 / 3 of the height of the sliding block 3. The self-locking mechanism 4 includes a mechanism housing 11 and a locking assembly 12. The mechanism housing 11 is fixedly installed in the mounting cavity 16 of the sliding block 3. The locking assembly 12 includes a locking pawl 5 and a connecting rod 13. The locking pawl 5 has a wedge-shaped structure 24 with a sharp front end 23 for quick insertion into the serrated groove 10. The rear end of the locking pawl 5 is connected to a spring seat 14. A compression spring 15 is provided between the spring seat 14 and the inner wall of the mechanism housing 11. The spring mechanism 6 consists of a compression spring 15 and a spring seat 14. The elastic coefficient of the compression spring 15 is selected to be between 500 N / m and 1200 N / m. This parameter range ensures sufficient locking force under normal operating conditions. The length of the compression spring 15 in its free state is 1.5 to 2 times the stroke distance of the locking pawl 5, ensuring that the spring is always within the effective elastic deformation range during operation. The safety rope connection point 7 is a ring structure, fixed to the geometric center of the device body 1 by welding. The welding point 25 adopts a full penetration welding process to ensure connection strength. The inner diameter of the safety rope connection point 7 is designed to be between 8 mm and 12 mm to accommodate standard safety rope specifications. The release handle 8 is connected to the device body 1 via a hinge shaft 17 to achieve a flexible operating angle. The end of the release handle 8 is connected to the connecting rod 13 of the locking pawl 5 via a connecting rope 18. When the operator pulls the release handle 8, the connecting rope 18 transmits tension to the connecting rod 13, overcoming the thrust of the compression spring 15 and pulling the locking pawl 5 out of the serrated groove 10, thus realizing the unlocking function of the device. The mounting bracket 9 has a U-shaped structure, and the two support arms 19 are connected to the bottom surface of the device body 1 by bolts 21. The support arms 19 are provided with mounting holes 20 for fixing the entire device to the building structure or work platform.

[0035] The manufacturing process of the device includes the following steps: First, the main body 1 and guide rail 2 are manufactured using precision machining. The serrated groove 10 of the guide rail 2 is CNC milled to ensure dimensional accuracy, followed by anodizing surface treatment to improve wear resistance and corrosion resistance. The sliding block 3 is manufactured using injection molding to ensure surface smoothness and dimensional accuracy. All components of the self-locking mechanism 4 are manufactured using precision machining. Special attention needs to be paid to the angle accuracy and surface roughness of the wedge structure 24 of the locking pawl 5. The compression spring 15 in the spring mechanism 6 is made of high-quality spring steel and undergoes heat treatment to ensure elastic performance and fatigue life. The safety rope connection point 7 is made of stainless steel and formed by precision casting or machining. After all components are completed, they are assembled. During assembly, all threaded connections are coated with anti-loosening thread sealant to ensure long-term reliability. When using the device, first fix the device to the building structure using the mounting bracket 9. The operator connects the safety rope to the safety rope connection point 7. During normal operation, the sliding block 3 moves smoothly in the guide rail 2. When a fall occurs, the device automatically locks. To continue moving, pull the release handle 8 to unlock.

[0036] The technical advantages of this solution compared to existing technologies are reflected in several aspects: First, the mechanical engagement locking mechanism between the locking pawl 5 and the serrated groove 10 features fast response and high reliability. When subjected to downward pulling force, it can lock within milliseconds, avoiding the delay and failure risks of electronic control systems. Second, the structural design of the wedge-shaped locking pawl 5 increases the locking force with increasing pulling force, creating a self-locking effect that tightens as it is pulled, providing an extremely high safety factor. Third, the automatic locking mechanism driven by the compression spring 15 requires no external power source and can work stably under any environmental conditions, making it particularly suitable for harsh high-altitude working environments. Fourth, the manual control design of the release handle 8 provides operators with the ability to actively control the device's status, maintaining operational flexibility while ensuring safety. Fifth, the precise fit between the guide rail 2 and the sliding block 3 ensures smooth movement, reduces working resistance, and improves work efficiency. The entire device adopts a purely mechanical structure without complex electronic components, making maintenance simple and service life long, providing an economical and practical technical solution for high-altitude work safety protection.

[0037] Based on the first embodiment, another embodiment can be obtained by changing the geometry of the serrated groove 10 and the structure of the locking pawl 5. In this improved embodiment, the serrated groove 10 adopts a semi-circular cross-section design instead of the original V-shaped cross-section. The center-to-center distance of the serrated grooves 10 remains unchanged, but the depth of each groove is increased by 10% to 15%, and the bottom of the groove presents a smooth arc-shaped surface. Correspondingly, the front end of the locking pawl 5 is designed as a spherical structure that matches the semi-circular serrated groove 10. The diameter of the sphere is slightly smaller than the radius of the serrated groove 10 to ensure a good fit. An auxiliary compression spring is added to the spring mechanism 6 and installed in parallel with the main compression spring 15. The elastic coefficient of the auxiliary spring is 30% to 40% of that of the main spring. This dual-spring design provides a smoother locking process and more precise release control. The structure of the release handle 8 has also been improved. A safety locking mechanism is added to the end of the handle to prevent accidental unlocking due to misoperation. The safety locking mechanism adopts a rotary lock design, which requires rotation to unlock before the release handle 8 can be pulled. The cross-section of the inner cavity 22 of the guide rail 2 was changed from rectangular to circular, and the corresponding sliding block 3 also adopted a cylindrical design. This improvement reduced the friction area during sliding and further improved the smoothness of movement. The structure of the mounting bracket 9 was changed from U-shaped to I-shaped, which increased the stability and load-bearing capacity of the installation. The web thickness of the I-shaped bracket was increased by 20%, and the flange width was increased by 15%, providing a larger installation contact area.

[0038] The manufacturing process of the improved solution is basically the same as that of the first implementation method, but some adjustments have been made to key process steps: the semi-circular serrated groove 10 is machined using a special forming milling cutter to ensure the consistency of the groove shape and surface quality. The front end of the spherical locking claw 5 needs to be machined by spherical grinding, requiring higher surface roughness. The assembly of the dual-spring system requires precise control of the pre-compression of the two springs to ensure coordinated operation. The manufacturing precision requirements of the circular guide rail 2 and the cylindrical sliding block 3 are higher, requiring precision turning. The rotary lock component of the safety locking mechanism needs to be manufactured by precision machining, and the surface treatment uses hard anodizing to improve wear resistance. The usage method is similar to that of the first implementation method, but the safety locking mechanism needs to be released first when operating the release handle 8, which increases the operation steps but improves safety. The circular cross-section design makes the movement of the device within the guide rail 2 smoother, making it particularly suitable for operation scenarios that require frequent movement.

[0039] The improvements of the improved solution compared to the first implementation are mainly reflected in the enhanced locking accuracy and operational safety: the cooperation between the semi-circular serrated groove 10 and the spherical locking claw 5 provides a larger contact area, dispersing the locking load, reducing local stress concentration, and increasing the service life of the device. The dual-spring system design makes the locking process smoother, reduces impact load, and provides more precise release control, avoiding the sudden release phenomenon that may occur with a single-spring system. The addition of a safety locking mechanism effectively prevents misoperation, especially in complex working environments, avoiding safety hazards caused by accidental contact with the release handle 8. The circular cross-section design has better mechanical properties and stronger load-bearing capacity than the rectangular cross-section, while reducing the complexity of the manufacturing process. The I-shaped mounting bracket 9 provides better installation stability, making it particularly suitable for applications bearing large loads. Compared to the existing technology, the improved solution, while maintaining all the technical advantages of the first implementation, further improves the accuracy, safety, and applicability of the device, providing a more comprehensive safety protection solution for different types of high-altitude operations.

[0040] Example 1:

[0041] This embodiment adopts the first scheme in the specific implementation. The main body 1 of the device is made of 6061-T6 aluminum alloy. The external dimensions of the main body 1 are 180mm in length, 120mm in width, and 80mm in height, with a wall thickness of 6mm. The surface is anodized, and the oxide film thickness is 15 micrometers, which has excellent corrosion resistance. The guide rail 2 is made of the same aluminum alloy material. The rail is 150mm long, and the inner cavity 22 has a rectangular cross-section with dimensions of 30mm × 20mm and a wall thickness of 5mm. The serrated grooves 10 are evenly distributed along the inner wall of the rail, with a groove spacing of 10mm, an inclination angle of 35 degrees, a groove depth of 2.5mm, and a groove width of 8mm. The surface is precision milled, and the surface roughness Ra value is 1.6 micrometers. The sliding block 3 is made of polyoxymethylene engineering plastic, with dimensions of 29.5mm × 19.5mm × 50mm. Its fit with the inner cavity 22 of the guide rail 2 is 0.25mm, ensuring smooth movement while preventing excessive loosening. The mounting cavity 16 has a depth of 30mm and a diameter of 25mm. The outer shell 11 of the self-locking mechanism 4 is made of 45# steel, heat-treated to achieve a hardness of HRC35-40. The shell dimensions are 24mm in diameter and 28mm in height. The locking pawl 5 is made of 40Cr steel, quenched and tempered to achieve a hardness of HRC45-50. The sharp tip 23 of the wedge structure 24 has an angle of 30°. The total length of the locking pawl 5 is 35mm, and its working stroke is 8mm. The compression spring 15 in the spring mechanism 6 is made of 65Mn spring steel with a wire diameter of 2.5mm, an outer diameter of 18mm, a free length of 40mm, a working length range of 25mm to 35mm, and an elastic modulus of 800N / m. The spring seat 14 is made of No. 45 steel. The safety rope connection point 7 is made of 304 stainless steel with an outer diameter of 20mm, an inner diameter of 10mm, and a ring material cross-section diameter of 5mm. It is fixed to the center of the main body 1 of the device by argon arc welding, and the welding strength reaches more than 90% of the strength of the base material. The release handle 8 is made of aluminum alloy, with a length of 100mm. It is connected to the main body 1 of the device by a stainless steel hinge shaft 17 with a diameter of 6mm. The connecting rope 18 is made of stainless steel wire rope with a diameter of 2mm and a breaking tensile strength of 1000N. The mounting bracket 9 is made of Q235 steel. The U-shaped support arm 19 is 80mm long and 8mm thick. The mounting hole 20 on the support arm 19 has a diameter of 12mm. It is connected to the main body 1 of the device by M10 bolts 21. The bolts are made of 304 stainless steel, and the connection is coated with medium-strength thread-locking adhesive. The total weight of the device in this embodiment is 3.2 kg, the maximum load capacity is 1500N, the locking response time is less than 50 milliseconds, and it has passed 1000 locking-releasing cycle tests under standard test conditions. There is no obvious wear on the components, and the functions are normal.The effectiveness test results of the embodiment show that the device can reliably lock under a tensile force of 1200N, with a sliding distance of less than 2mm after locking, a release operation force of 25N, and a movement resistance of less than 10N, meeting the technical requirements for safety protection in high-altitude operations. Compared with existing fall arrest devices that rely solely on friction or simple mechanical latches, this embodiment provides a higher safety factor and faster response speed through a wedge-shaped locking mechanism, effectively reducing the safety risks of high-altitude operations and improving work efficiency and the sense of security for workers.

[0042] Example 2:

[0043] like Figure 3As shown, this embodiment adopts the improved scheme in the specific implementation. The main body 1 of the device is also made of 6061-T6 aluminum alloy, but the external dimensions are adjusted to be 200mm long, 130mm wide, and 90mm high to adapt to the installation requirements of the circular cross-section guide rail 2. The guide rail 2 adopts a circular cross-section design with an inner diameter of 35mm and a wall thickness of 6mm. The groove depth of the semi-circular serrated groove 10 is 3mm, the groove spacing is maintained at 10mm, the bottom arc radius of the groove is 1.5mm, and the surface is precision turned and ground, with a surface roughness Ra value of 0.8 micrometers. The sliding block 3 is changed to a cylindrical design with a diameter of 34.5mm and a length of 60mm. It is made of polytetrafluoroethylene engineering plastic, which has a lower coefficient of friction, and the fitting clearance with the guide rail 2 is 0.25mm. The spherical structure at the front end of the locking claw 5 has a diameter of 2.8mm, and the center distance of the spherical surface from the axis of the locking claw 5 is 1.4mm. It is processed by spherical grinding, with a surface roughness Ra value of 0.4 micrometers. The spring mechanism 6 adopts a double-spring design. The parameters of the main compression spring 15 are the same as in Example 1. The auxiliary compression spring has a wire diameter of 1.8mm, an outer diameter of 15mm, a free length of 35mm, and an elastic coefficient of 300N / m. The two springs are installed in parallel, with a total elastic coefficient of 1100N / m. The length of the release handle 8 is increased to 120mm, and a safety locking mechanism is added to the end of the handle. The locking mechanism adopts a rotary lock design with a rotation angle of 90 degrees and a locking torque of 5N·m. The rotary lock is made of brass and has a chrome-plated surface. The mounting bracket 9 is changed to an I-shaped structure with a web height of 100mm, a thickness of 10mm, and upper and lower flange widths of 60mm and a thickness of 12mm. It is made of Q345 steel, heat-treated, and hot-dip galvanized for corrosion protection, with a zinc layer thickness of 65 microns. The connecting bolt 21 is upgraded to M12 specification, using 10.9 grade high-strength bolts with a Dacromet coating. The device in this embodiment weighs 4.1 kg, has a maximum load capacity of 2000 N, and a locking response time of less than 40 milliseconds. It passed 2000 lock-release cycle tests and a 100-hour salt spray corrosion test under enhanced testing conditions. Performance tests show that the device can reliably lock under a 1800 N tensile force, with a sliding distance of less than 1.5 mm after locking. Due to the spherical contact design, the contact stress distribution is more uniform, reducing localized wear. The release force is 28 N, but the presence of the safety locking mechanism effectively prevents misoperation, reducing movement resistance to 6 N. The circular cross-section design significantly improves the smoothness of movement. The application of the dual-spring system makes the locking process smoother, reduces impact noise, and improves locking accuracy by 25%. Compared to Embodiment 1, this embodiment shows significant improvements in load capacity, service life, and operational safety, making it particularly suitable for heavy-duty and long-term high-altitude work environments.Compared with existing technologies, this embodiment not only maintains the advantages of simple and reliable mechanical structure, but also further improves the overall performance of the device through structural optimization and material upgrades, providing more comprehensive safety protection for high-risk high-altitude operations. It is an important advancement in the development of high-altitude operation safety protection technology.

[0044] Specifically, the principle of this invention is as follows: the device achieves parallel movement through the cooperation of a guide rail and a sliding block. When the operator moves normally, the sliding block slides smoothly within the guide rail, and the locking pawl slightly contacts the serrated groove under the action of the spring mechanism but does not form a complete engagement. In the event of an accidental fall or downward pull, the sliding block moves downward under force, and the locking pawl quickly inserts into the serrated groove under the thrust of the spring mechanism and gravity. Due to the inclined angle design of the serrated groove, the locking pawl forms a wedge-shaped lock; the greater the pull, the tighter the lock, achieving a reliable self-locking function. To release, the connecting rope is pulled by the release handle, overcoming the spring force to pull the locking pawl out of the serrated groove, and the device returns to its moving state. The entire process requires no external power, relying entirely on the ingenious design of the mechanical structure to achieve both automatic locking and manual release functions, ensuring the reliability and safety of the system.

Claims

1. A fall-prevention self-locking device for safety protection during high-altitude operations, comprising a device body, a guide rail mounted on the device body, a sliding block disposed within the guide rail, a self-locking mechanism connected to the sliding block, a locking pawl disposed within the self-locking mechanism, a spring mechanism cooperating with the locking pawl, a safety rope connection point connected to the device body, a release handle disposed on one side of the device body, and a mounting bracket mounted on the bottom of the device body, characterized in that, The locking pawl engages with the serrated groove of the guide rail through the thrust of the spring mechanism, and automatically locks when subjected to downward pulling force.

2. The fall-prevention self-locking device for safety protection during high-altitude operations according to claim 1, characterized in that, The inner wall of the guide rail is provided with equally spaced serrated grooves, the inclination angle of which is 30° to 45°, and the depth of which is 1 / 3 to 1 / 2 of the thickness of the rail wall.

3. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 2, characterized in that, The shape of the sliding block matches the inner cavity shape of the guide rail. The top of the sliding block has a mounting cavity to accommodate the self-locking mechanism. The depth of the mounting cavity is 1 / 2 to 2 / 3 of the height of the sliding block.

4. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 3, characterized in that, The self-locking mechanism includes a housing and a locking component disposed within the housing. The locking component includes a locking pawl and a connecting rod connected to the locking pawl. The connecting rod extends through the bottom of the housing into the interior of the sliding block.

5. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 4, characterized in that, The locking pawl has a wedge-shaped structure. The front end of the locking pawl is sharp and used to insert into the serrated groove. The rear end of the locking pawl is connected to a spring seat, and a compression spring is provided between the spring seat and the inner wall of the mechanism housing.

6. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 5, characterized in that, The spring mechanism includes a compression spring and a spring seat. The spring constant of the compression spring is 500 N / m to 1200 N / m, and the length of the compression spring in the free state is 1.5 to 2 times the travel distance of the locking pawl.

7. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 6, characterized in that, The safety rope connection point is a ring structure. The safety rope connection point is fixed to the geometric center of the main body of the device by welding. The inner diameter of the safety rope connection point is 8mm to 12mm.

8. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 7, characterized in that, The release handle is connected to the main body of the device via a hinge shaft. The end of the release handle is connected to the connecting rod of the locking pawl via a connecting rope. When the release handle is pulled, the locking pawl disengages from the serrated groove to unlock the device.

9. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 8, characterized in that, The mounting bracket has a U-shaped structure. The two support arms of the mounting bracket are connected to the bottom surface of the main body of the device by bolts. The support arms are provided with mounting holes for fixing to the building structure.

10. A fall-prevention self-locking device for safety protection during high-altitude operations according to claim 9, characterized in that, The main body of the device is made of aluminum alloy, the surface of the guide rail is anodized, the sliding block is made of high-strength engineering plastic, and anti-loosening thread adhesive is provided at each connection part.

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