High-altitude operation anti-falling locking mechanism for electric power construction

Abstract

The invention relates to the technical field of safety equipment for power construction, in particular to a high-altitude operation anti-falling locking mechanism for power construction, which comprises a housing, a rolling wheel is arranged in the housing, a rolling spring is wound in the rolling wheel, one end of a rope penetrates out of the lower part of the housing to be connected with a lock hook, and the upper part outside the housing is also connected with the lock hook; the winding wheel comprises a main shaft and a winding drum, the main shaft is arranged on the housing, and the winding drum is rotationally arranged on the main shaft; a first ratchet wheel is coaxially fixed to the winding drum, ratchet wheel locking assemblies are arranged in the housing and matched with the first ratchet wheel, and at least two ratchet wheel locking assemblies are arranged on the first ratchet wheel in a matched mode. The distance between the locking end of each ratchet wheel locking assembly and the upper teeth of the first ratchet wheel is not consistent, and the multiple distances are sequentially changed in a gradient mode from small to large. A magnetic buffering assembly is arranged at one position of the ratchet wheel and comprises a permanent magnet and a conductive disc. By means of the device, the technical purposes of rapid locking aiming at different falling speeds of high-altitude personnel and stepless buffering in the locking process are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of safety equipment for electric power construction, and more specifically, to an anti-falling locking mechanism for high-altitude operations in electric power construction. Background Art

[0002] In electric power construction, the anti-falling locking mechanism for high-altitude operations is a key device to ensure the safety of workers. Nowadays, the anti-falling locking mechanism for high-altitude operations generally uses a speed differential anti-falling device. One end of the speed differential anti-falling device is connected to the worker through a retractable high-strength rope, and the other end is connected to a high-altitude anchor point. When the worker is working normally, the rope can be retracted and extended normally, while in the event of an accidental fall of the person, it will quickly lock, restricting the falling distance, thereby reducing the risk of injury. Its working principle is based on the triggering of braking by the speed difference. When a fall occurs, the rope is quickly pulled out, triggering the internal braking mechanism. The braking structure brakes and locks the rope, and after locking, the rope stops being pulled out to protect the worker.

[0003] In the prior art, the traditional speed differential anti-falling device generally only has one braking structure for single-speed differential braking. If the triggering speed is too low (such as for a person with a lighter weight), it is difficult to lock in time. If the triggering speed is too high (such as for a person with a heavier weight), after the triggering and locking, the braking structure bears a large braking force and is easily damaged. Therefore, it is necessary to provide an anti-falling locking mechanism that can adapt to different falling speeds.

[0004] Moreover, after the rope stops being locked by the traditional speed differential anti-falling device, the instantaneous tension generated when the rope stops will act on the falling person, causing the person who stops falling to be subjected to a large impact force and being easily injured. In real life, generally, a spring is set on the rope for buffering and shock absorption. However, when the spring buffers, it is easy to cause the person to sway in the air, increasing the danger. And during long-term use, the elastic index will also decrease, and it is also easy to break after the elastic buffer is tightened. Therefore, a relatively safe stepless buffering structure is needed to buffer and damp the locking process of the anti-falling locking mechanism. Summary of the Invention

[0005] The purpose of the present application is to provide an anti-falling locking mechanism for high-altitude operations in electric power construction, which solves the technical problems of quickly locking for different falling speeds of high-altitude personnel and performing stepless buffering during the locking process.

[0006] To solve the above technical problems, the solution adopted in the present application is as follows:

[0007] An anti-falling locking mechanism for high-altitude operations in electric power construction includes a housing. A reel for winding a rope is arranged inside the housing. A winding spring is wound inside the reel. One end of the rope passes through the lower part of the housing and is connected to a locking hook, and the upper part outside the housing is also connected to the locking hook.

[0008] Preferably, the winding wheel comprises a main shaft and a winding drum. The main shaft is arranged on the housing, and the winding drum is rotatably arranged on the main shaft.

[0009] Preferably, a first ratchet wheel is coaxially fixed on the winding drum. A ratchet locking assembly is arranged in the housing. The ratchet locking assembly is matched with the first ratchet wheel, and at least two ratchet locking assemblies are arranged on the first ratchet wheel in a matching manner.

[0010] Preferably, the distance between the locking end of each ratchet locking assembly and the teeth on the first ratchet wheel is inconsistent, and multiple such distances gradually change in a gradient from small to large.

[0011] Preferably, a magnetic buffer assembly is arranged at the first ratchet wheel. The magnetic buffer assembly comprises a permanent magnet and a conductive disk.

[0012] Preferably, the conductive disk is coaxially fixed on the main shaft, and a ring-shaped permanent magnet is arranged outside the disk. The ring-shaped permanent magnet is fixed on the first ratchet wheel.

[0013] Preferably, the ratchet locking assembly comprises a pawl. The pawl is rotatably arranged in the housing. One end of the pawl in an arc shape is set as a pendulum, and the other end in an arc shape is set as a first claw. A pre-tightening structure is arranged at the rotating end of the pawl. The pendulum is in sliding contact with the teeth on the outer edge of the first ratchet wheel through the pre-tightening structure.

[0014] Preferably, the pawl is in an arc-shaped structure, and the inner arc end of the arc-shaped structure is in sliding contact with the teeth on the outer edge of the first ratchet wheel.

[0015] Preferably, under normal working conditions, there is a distance between the first claw and the teeth on the outer edge of the ratchet wheel; under locking working conditions, the first claw is clamped and locked with the teeth on the outer edge of the ratchet wheel.

[0016] Preferably, two first ratchet wheels are arranged in the housing. The two first ratchet wheels are symmetrically distributed at both ends of the winding drum, and each first ratchet wheel is matched with a ratchet locking assembly.

[0017] Preferably, the permanent magnet is set as a ring-shaped Halbach array, and a uniform unilateral strong magnetic field is formed inside the ring.

[0018] Preferably, the conductive disk is set as a copper disk.

[0019] Preferably, one end of the innermost layer of the coil spring is fixedly connected to the main shaft, and one end of the outermost layer of the coil spring is fixedly connected to the winding drum.

[0020] A tension adjusting assembly is arranged on the main shaft.

[0021] Preferably, the tension adjusting assembly comprises a second ratchet wheel. One end of the main shaft penetrates out of the housing, and the second ratchet wheel is coaxially fixed on the shaft of this end of the main shaft.

[0022] Preferably, a knob is coaxially fixed at this end of the main shaft.

[0023] Preferably, a second pawl is clamped on the teeth on the outer edge of the second ratchet. The second pawl is connected to a lever, and the middle part where they are connected is rotatably arranged on a second fixed shaft, and the fixed shaft is fixed outside the housing.

[0024] Preferably, a second spring is arranged between the second pawl and the housing.

[0025] The technical solution of the present application has at least the following advantages and beneficial effects:

[0026] In the present invention, by arranging a plurality of ratchet locking components on the ratchet that rotates as the rope is pulled out, the stability of the locking process is improved; and the distances between the locking ends of the plurality of ratchet locking components and the teeth on the ratchet are arranged in a gradient from small to large in sequence; so that at a relatively low falling speed of the person (i.e., the rope pulling-out speed), some ratchet locking components with smaller distances quickly lock the ratchet, improving the locking speed and reducing the locking impact force; at a relatively high falling speed of the person, both the ratchet locking components with smaller distances and those with larger distances quickly lock the ratchet, improving the locking stability and being used to withstand a greater locking impact force;

[0027] In the present invention, by arranging an annular permanent magnet on the rotating first ratchet and fixing a copper disk on the inner side of the ring, when the first ratchet rotates due to the rope being pulled out, the annular permanent magnet will rotate relative to the copper disk, thereby cutting the magnetic induction lines, generating a magnetic eddy current-like current, and forming an eddy current damping effect, applying a resistance force to the rotating first ratchet, thereby reducing its rotation speed; and at any rotation speed of the first ratchet, the magnetic buffer component will apply a buffer resistance to it, and can also apply a corresponding resistance force to the sudden variable-speed rotation of the first ratchet during the person's falling process, thereby reducing the maximum rotation speed of the first ratchet and realizing a smooth transition of the speed during the process of the rope falling and being pulled out (gradually transitioning from high speed to low speed until stopping), and realizing a gentle and continuous resistance buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic cross-sectional structure diagram of the present invention.

[0029] Figure 2 It is a schematic structure diagram of the present invention.

[0030] Figure 3 It is a schematic cross-sectional structure diagram of the reel in the present invention.

[0031] Figure 4 It is a schematic cross-sectional structure diagram of the coil spring in the present invention.

[0032] Figure 5 It is a schematic cross-sectional structure diagram of the ratchet locking component in the present invention.

[0033] Figure 6 It is a schematic cross-sectional structure diagram of the magnetic buffer component in the present invention.

[0034] Figure 7 This is the front view structural schematic diagram of the present invention.

[0035] Figure 8 This is the sectional view structural schematic diagram of the tension adjustment component in the present invention.

[0036] In the figure: 1 - housing, 2 - drum, 201 - main shaft, 202 - drum, 3 - rope, 4 - torsion spring, 5 - ratchet one, 6 - ratchet locking component, 601 - fixed shaft one, 602 - pendulum, 603 - pawl one, 604 - spring one, 7 - magnetic buffer component, 701 - permanent magnet block, 702 - copper disc, 8 - tension adjustment component, 801 - knob, 802 - ratchet two, 803 - pawl two, 804 - fixed shaft two, 805 - lever, 806 - spring two, 9 - locking hook. Detailed implementation manners

[0037] 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.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. If terms such as "center", "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application. It should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected" are understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

[0039] In the prior art, when power personnel perform power construction in a high-altitude environment, a fall arrester needs to be installed on the power personnel. For example, a speed differential fall arrester, which is internally equipped with an inertial sensing device (such as a centrifugal mechanism, ratchet, or hydraulic damping system). When the power personnel move slowly, the steel cable / webbing inside the speed differential fall arrester can freely stretch and retract. The device maintains the rope tension through a spring or a rewinding mechanism inside, without affecting the flexibility of movement. When the steel cable or webbing connected to the safety belt is quickly pulled out (during a fall), the device will detect a sudden change in speed or an acceleration exceeding the threshold, and immediately trigger the braking lock to stop the person from continuing to fall and protect them.

[0040] Embodiment 1

[0041] Please refer to Figures 1-4 , the present invention provides a high-altitude operation fall arrest and locking mechanism for power construction, including a housing 1. A handle is provided outside the housing 1, which is convenient for the staff to pick up the housing 1 with one hand at high altitude.

[0042] A reel is arranged inside the housing 1. The reel includes a main shaft 201 and a drum 2. The main shaft 201 is arranged on the housing 1, and the drum 2 is rotatably arranged on the main shaft 201. A rope 3 is wound around the drum 2. One end of the rope 3 passes through the lower part of the housing 1 and is connected to a locking hook 9, and the locking hook 9 is latched on the staff. When the staff moves outwards, the rope 3 follows and extends. One end of a torsion spring 4 is also connected inside the rotating drum 2, and the other end of the torsion spring 4 is fixed on the main shaft 201. When the drum 2 rotates, it will be affected by the elastic force of the torsion spring 4. When the extended rope 3 becomes loose, the elastic force of the torsion spring 4 will overcome the pulling force from the staff, drive the drum 2 to rotate back, and rewind the rope 3 onto the drum 2, reducing the situation where the rope 3 is wound around the external environment after extension.

[0043] A locking hook 9 is also connected to the top of the housing 1. The locking hook 9 here is convenient for the staff to temporarily latch the entire mechanism to the building for high-altitude operation, facilitating the staff's operation.

[0044] Please refer to Figure 5 , in this embodiment, a ratchet one 5 is coaxially fixed on the drum 2, and a ratchet locking component 6 is arranged inside the housing 1. The ratchet locking component 6 is matched with the ratchet one 5.

[0045] When the rope 3 is pulled out of the housing 1 at a slower speed (i.e., when the drum 2 rotates and the ratchet one 5 rotates), the locking end of the ratchet locking component 6 will have a spacing from the teeth on the outer edge of the ratchet one 5 and not contact. The ratchet one 5 rotates normally, and the rotation of the drum 2 drives the rope 3 to be pulled out normally.

[0046] When the rope 3 is pulled out of the housing 1 too quickly (i.e., when the rotation speed of the drum 2 is too high and the ratchet 5 rotates too quickly), the locking end of the ratchet locking assembly 6 will contact the teeth on the outer edge of the ratchet 5, stopping the rotation of the ratchet 5, causing the drum 2 to stop rotating, and the rope 3 cannot be pulled out anymore.

[0047] Specifically, in order to achieve the locking of the ratchet 5 by the ratchet locking assembly 6, the ratchet locking assembly 6 includes a pawl. The pawl is integrally arc-shaped. The pawl is rotatably arranged on the first fixed shaft 601. The first fixed shaft 601 is fixed inside the housing 1. One arc-shaped end of the pawl is set as a pendulum 602, and the other arc-shaped end is set as a first claw 603. A pre-tightening structure (such as the torque pre-tightening of a torsion spring) is arranged at the rotating end of the pawl. The pre-tightening force makes the pendulum 602 at one end of the pawl close to and contact the teeth on the outer edge of the ratchet 5. When the ratchet 5 rotates, the teeth on the outer edge of the ratchet 5 will always touch the pendulum 602 during rotation, causing the pendulum 602 to swing along its rotating end under the collision force. After the pendulum 602 swings, it will swing back due to the pre-tightening force on the rotating end. Thus, in the continuous rotation state of the ratchet 5, the pendulum 602 always collides with the teeth and then returns. The pendulum 602 itself has a counterweight, so that a large centrifugal force is generated when the pendulum 602 swings, increasing its swing amplitude.

[0048] Among them, when the rope 3 is slowly pulled out, the rotation speed of the ratchet 5 is relatively low, and the frequency of the teeth colliding with the pendulum 602 at a low rotation speed is relatively low. The collision force received by the pendulum 602 is relatively small, and the swing amplitude is relatively small. At this time, the first claw 603 at the other arc-shaped end of the pawl will not contact the ratchet 5 during the swing, and the ratchet 5 rotates normally; when the rope 3 is suddenly pulled out quickly, the rotation speed of the ratchet 5 becomes higher, and the frequency of the teeth colliding with the pendulum 602 at a high rotation speed suddenly becomes faster. The collision force received by the pendulum 602 suddenly becomes larger, and the swing amplitude will suddenly increase. At this time, the first claw 603 at the other end of the pawl will be stuck between the teeth of the ratchet 5 during the large swing, thereby restricting the rotation of the ratchet 5 to achieve locking, and the rope 3 cannot be pulled out anymore.

[0049] It should be noted that in some embodiments, a pre-tightening structure (such as a torsion spring) can be arranged at the rotating end of the pawl to apply torque pre-tightening to the pendulum 602 so that the pendulum 602 swings and contacts the teeth on the outer edge of the ratchet 5; in other embodiments, one end of a first spring 604 can also be fixedly connected to the pendulum 602 end of the pawl, and the other end of the first spring 604 is fixed on the first fixed shaft 601, and the elastic force is used to drive the pendulum 602 to swing and contact the teeth on the outer edge of the ratchet 5.

[0050] In the prior art, during the ratchet locking process, generally only one pawl for locking is matched on the ratchet. When locking the rope 3, one pawl is inserted into the ratchet for locking. During this process, if the pulling force at the pulling end of the rope 3 is too large, the force exerted by the ratchet on the pawl will be too large, which easily causes damage to a single pawl, resulting in locking failure and reducing the safety of locking.

[0051] Therefore, in this embodiment, two ratchets are provided inside the housing 1. The two ratchets are symmetrically distributed at both ends of the drum 2, and at least two ratchet locking components 6 are matched on each ratchet, reducing the occurrence of the situation where the pulling force of the rope 3 is too large and the locking fails.

[0052] Please refer to Figure 5 , in this embodiment, in order to perform dynamic response locking for different pulling speeds of the rope 3 (i.e., the magnitude of the instantaneous pulling force), the distances between the first claws 603 at one end of multiple pawls and the outer edge teeth of the ratchet change in a gradient manner in sequence. The distance between the first claw 603 and the teeth increases from small to large. When locking, when the locking rotation speed of the first ratchet 5 is relatively low, the first claw 603 with a smaller distance will contact the first ratchet 5 and be locked by the small swing of the pendulum 602, and the first claw 603 with a larger distance does not lock the first ratchet 5, improving the locking response speed; when the locking rotation speed of the first ratchet 5 is relatively high, both the first claws 603 with smaller and larger distances will contact the first ratchet 5 and be locked by the large swing of the pendulum 602, increasing the force borne during locking and improving safety.

[0053] During high-altitude electrical construction, when the rope 3 is locked by the ratchet locking component 6, the staff at the pulling end of the rope 3 locked by the locking hook 9 bears a large downward impact force during locking, which easily causes the staff to be injured. Therefore, a magnetic buffer component 7 is provided at the first ratchet 5 to weaken or offset the downward impact force received by the staff by using magnetism.

[0054] Furthermore, the magnetic buffer component 7 includes a permanent magnet and a copper disk 702. The copper disk 702 is coaxially fixed on the main shaft 201, and a ring of permanent magnets is arranged outside the copper disk 702. The ring of permanent magnets is fixed on the first ratchet 5. When the ring of permanent magnets rotates with the first ratchet 5, it is different from the copper disk 702 fixed on the main shaft 201, so that the copper disk 702 relatively cuts the magnetic induction lines of the magnetic ring, generating an eddy current damping effect, thereby applying a resistance to the first ratchet 5, hindering the rotation speed of the first ratchet 5, slowing down the pulling speed of the rope 3, and thus applying a magnetic buffer force to the rope 3.

[0055] Specifically, the permanent magnet is set as a ring Halbach array. By arranging permanent magnets with different magnetization directions according to a specific pattern, the magnetic fields generated by the different magnetization directions are superimposed and interfered with each other to form a uniform unidirectional strong magnetic field, which makes the magnetic field of the permanent magnet concentrated on the inner side of the ring, reducing magnetic leakage. As a result, the magnetic suction force generated outside the housing 1 is small, reducing the impact on high-altitude operations.

[0056] The copper disk 702 inside the ring permanent magnet, due to the high conductivity of the copper structure, can interact with the external ring Halbach array permanent magnet to efficiently generate eddy current-like currents.

[0057] The eddy current damping effect occurs when the copper disk 702 cuts the magnetic induction lines or is in an alternating magnetic field (i.e., a rotating ring permanent magnet), and eddy current-like currents are formed inside. According to Lenz's law, the direction of the magnetic field generated by the eddy current always opposes the change of the original magnetic field, resulting in the rotation of the ratchet being hindered. At the same time, the eddy current-like currents can be converted into heat energy (Joule heat) through the resistance of the copper disk 702, and the mechanical kinetic energy is consumed, further achieving the damping effect.

[0058] Therefore, when the pulling speed of the rope 3 is faster, the rotation speed of the ratchet 1-5 is faster, and the frequency of the copper disk 702 relatively cutting the magnetic induction lines is faster, making the eddy current damping effect stronger and the generated damping effect greater.

[0059] Preferably, during the pulling process of the rope 3, the magnetic locking assembly will always apply a resistance force to the rope 3. When the staff drives the rope 3 to change slightly due to work, the vibration generated by the multi-frequency and small-amplitude pulling force of the rope 3 will be buffered by the corresponding resistance force applied by the magnetic locking assembly on the ratchet 1-5 (the ratchet 1-5 will rotate synchronously due to the pulling of the rope 3), canceling out the vibration transmitted by the rope 3 and reducing the impact of the vibration on the entire locking mechanism, thereby improving the service life of the entire locking mechanism.

[0060] Preferably, during the locking process of the rope 3, the pulling speed of the rope 3 changes as follows: slowly pulling out at a constant speed - pulling out at a high-speed variable speed - stopping. During this process, the resistance effect of the magnetic locking component on the rope 3 changes as follows: a relatively small resistance operation - the resistance effect gradually increases - the resistance effect stops. Among them, when the rope 3 is pulled out at a variable speed, the magnetic locking component will respond synchronously and continuously increase the resistance effect on the first ratchet 5 by using the eddy current damping effect, so that the first ratchet 5 starts to decelerate when it rotates at a variable speed, thereby reducing the maximum rotation speed of the first ratchet 5 during the locking process. After the rotation speed decreases relatively, the instantaneous impact force generated when the rope 3 is locked will also decrease accordingly, thereby providing impact shock protection for the staff on the rope 3. In addition, since the resistance effect generated by the rotation of the first ratchet 5 by the magnetic damping component is infinitely variable, the magnetic damping component performs infinitely variable damping and speed reduction during the entire process of damping and speed reduction of the rope 3. Therefore, during the process of the rope 3 being pulled out rapidly and then locked and stopped suddenly, the smooth transition of the speed change in the rope 3 can be maintained, the magnitude of the instantaneous tension borne by the rope 3 can be reduced, and the risk of the rope 3 breaking can be lowered.

[0061] Embodiment 2

[0062] In the prior art, after the rope 3 wound inside the speed differential anti-falling device is pulled out, it will be rewound into the speed differential anti-falling device under the elastic force of the winding spring 4. Among them, the tighter the winding spring 4 is wound, the greater its effect, the greater the retraction force on the rope 3, and the greater the tension on the rope segment of the rope 3. However, the winding spring 4 installed inside the current speed differential anti-falling device cannot adjust its winding tightness. After the speed differential anti-falling device is used for a long time, the winding spring 4 becomes loose and the elastic force becomes smaller, making it easy for the pulled-out rope 3 to be difficult to be rewound into the speed differential anti-falling device.

[0063] Please refer to Figure 7 and Figure 8 , in this embodiment, a tension adjusting component 8 is provided on the main shaft 201 that fixes one end of the winding spring 4. The tension adjusting component 8 can rotate the main shaft 201, and by rotating the main shaft 201, the innermost end of the winding spring 4 is wound tightly to adjust the winding tightness of the winding spring 4 that has been used for a long time.

[0064] Among them, the tension adjusting component 8 includes a knob 801, a second ratchet 802, a second pawl 803, a second fixed shaft 804, a lever 805, and a second spring 806.

[0065] Specifically, one end of the main shaft 201 penetrates through the housing 1. The second ratchet 802 is coaxially fixed on the shaft of this end of the main shaft 201, and the knob 801 is coaxially fixed on this end of the main shaft 201. By rotating the knob 801, the main shaft 201 can be rotated, driving the second ratchet 802 to rotate, and driving the innermost end of the winding spring 4 fixedly connected to the main shaft 201 to be wound tightly.

[0066] The second pawl 803 is clamped on the teeth on the outer edge of the second ratchet wheel 802. The second pawl 803 is fixed at one end of the pawl structure. The other end of the pawl is fixedly provided with a lever 805. The middle part of the pawl structure is rotatably provided on the second fixed shaft 804. The fixed shaft is fixed outside the housing 1. When the lever 805 is manually pushed, the lever 805 drives the second pawl 803 at the other end of the pawl structure to swing through the lever movement, so that the second pawl 803 abuts against or moves away from the teeth on the outer edge of the second ratchet wheel 802. The pawl structure is provided with one end of the second pawl 803 fixedly connected to one end of the second spring 806. The other end of the second spring 806 is fixed outside the housing 1 to provide elastic force for the second pawl 803, so that the second pawl 803 is always clamped on the teeth under normal circumstances.

[0067] When the entire device is working normally, the winding force of the coil spring 4 is applied to the main shaft 201, and the ratchet 2 802 on the main shaft 201 is restricted by the clamping claw 2 803 under the action of elastic force. The two forces restrain each other, so that the main shaft 201 is fixed and does not rotate, maintaining the normal locking function of the device.

[0068] When the winding degree of the coil spring 4 in the device is increased, the knob 801 is manually twisted to drive the ratchet wheel 802 on the main shaft 201 to rotate, and the teeth on the ratchet wheel 802 begin to move away from the claw 803, realizing normal one-way rotation (one-way gear structure), winding the coil spring 4 on the main shaft 201, and maintaining the winding degree of the coil spring 4; when the knob 801 is loosened, the ratchet wheel 802 is rotated by the winding force of the coil spring 4 on the main shaft 201, and the teeth on the outer edge of the ratchet wheel 802 will be blocked and engaged by the claw 803 again, limiting its rotation and maintaining the winding degree of the coil spring 4.

[0069] When the winding degree of the coil spring 4 in the device is reduced, the toggle lever 805 is manually toggled, so that the second claw 803 swings away from the teeth of the second ratchet wheel 802. At this time, the second ratchet wheel 802 is only subjected to the winding force of the coil spring 4 on the main shaft 201, and thus rotates in the opposite direction (i.e., the opposite direction of the rotation direction of the knob 801), thereby loosening the tightness of the coil spring 4 on the main shaft 201; when the toggle lever 805 is released, the second claw 803 is acted upon by the elastic force of the second spring 806, and swings again to be clamped into the teeth on the second ratchet wheel 802, thereby limiting the rotation of the second ratchet wheel 802, and the main shaft 201 no longer rotates, thereby maintaining the winding degree of the coil spring 4.

[0070] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solution invented here based on the above description, and the scope of the present invention is defined by the attached claims.

Claims

1. A locking mechanism for preventing falling at high altitude during electric power construction, comprising a housing (1), a reel for winding a rope (3) is arranged inside the housing (1), a coil spring (4) is wound inside the reel, one end of the rope (3) passes through the lower part of the housing (1) and is connected to a locking hook (9), and the upper part of the housing (1) is also connected to the locking hook (9), characterized in that ； The reel comprises a main shaft (201) and a reel (2); the main shaft (201) is arranged on the housing (1), and the reel (2) is rotatably arranged on the main shaft (201); A ratchet wheel 1 (5) is coaxially fixed on the reel (2), a ratchet wheel locking assembly (6) is arranged in the housing (1), the ratchet wheel locking assembly (6) matches the ratchet wheel 1 (5), and at least two ratchet wheel locking assemblies (6) are matched on the ratchet wheel 1 (5); The spacings between the locking end of each ratchet locking assembly (6) and the teeth on the ratchet wheel (5) are not consistent, and the plurality of spacings change in a gradient from small to large; A magnetic buffer component (7) is provided at the ratchet wheel (5), and the magnetic buffer component (7) comprises a permanent magnet and a conductive disk; The conductive disk is coaxially fixed on the main shaft (201), and a circle of annular permanent magnets is arranged outside the disk, and the annular permanent magnets are fixed on ratchet wheel 1 (5).

2. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 1 is characterized in that: The ratchet locking assembly (6) comprises a pawl, which is rotatably arranged in the housing (1), one arc-shaped end of the pawl is arranged as a pendulum (602), and the other arc-shaped end is arranged as a clamping claw (603), and the rotating end of the pawl is provided with a pre-tightening structure, and the pendulum (602) is in sliding contact with the teeth on the outer edge of the ratchet (5) through the pre-tightening structure.

3. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 2 is characterized in that: The pawl is an arc-shaped structure, and the inner arc end of the arc-shaped structure is in sliding contact with the teeth on the outer edge of the ratchet wheel (5).

4. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 2 is characterized in that: Under normal working conditions, there is a gap between the first clamping claw (603) and the outer teeth of the ratchet wheel; under the locking working condition, the first clamping claw (603) is locked with the outer teeth of the ratchet wheel.

5. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 1 is characterized in that: Two ratchet wheels (5) are arranged in the housing (1), and the two ratchet wheels (5) are symmetrically distributed at two ends of the reel (2), and each ratchet wheel (5) is matched with a ratchet locking assembly (6).

6. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 1 is characterized in that: The permanent magnet is arranged as a ring-shaped Halbach array, forming a uniform unilateral strong magnetic field inside the ring.

7. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 1 is characterized in that: The conductive disk is configured as a copper disk (702).

8. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 1 is characterized in that: One end of the innermost layer of the coil spring (4) is fixedly connected to the main shaft (201), and one end of the outermost layer of the coil spring (4) is fixedly connected to the winding drum (2); The main shaft (201) is provided with a tension adjustment component (8).

9. The anti-fall locking mechanism for high-altitude work in electric power construction according to claim 8 is characterized in that: The tension adjustment assembly (8) comprises a second ratchet (802), one end of the main shaft (201) is passed through the housing (1), and the second ratchet (802) is coaxially fixed on the end shaft of the main shaft (201); A knob (801) is coaxially fixed to the end of the main shaft (201); The teeth on the outer edge of the second ratchet wheel (802) are clamped with a second claw (803), the second claw (803) is connected to the lever (805), and the middle part of the connection between the two is rotatably arranged on a second fixed shaft (804), and the fixed shaft is fixed outside the housing (1); A second spring (806) is provided between the second clamping claw (803) and the cover shell (1).

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