Fall arrestor

Abstract

This utility model relates to the field of safety protection technology, and provides a fall arrestor self-locking device, including a fall arrestor body, a locking component, and an anti-tipping component. The fall arrestor body has an installation groove and a receiving groove, which are interconnected. The installation groove is adapted to connect with a guide rail, and the groove wall of the receiving groove has a mating part. The locking component includes a pivot, a locking member, and a first elastic member. The pivot passes through the fall arrestor body and is located in the receiving groove. The locking member is located on the pivot and rotates with the pivot. The first elastic member is sleeved on the pivot and connects with the locking member and the fall arrestor body. The anti-tipping component is movably located on the locking member. When the fall arrestor body is in an inverted state, the locking member extends from the receiving groove into the installation groove, and the anti-tipping component extends out of the locking member under the action of gravity, and cooperates with the mating part to limit the connection between the fall arrestor body and the guide rail. This utility model can realize the anti-tipping protection function, avoid the fall arrestor self-locking device from failing due to incorrect installation direction, and improve the safety of the fall arrestor self-locking device.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology and provides a fall-prevention self-locking device. Background Technology

[0002] As a crucial component of the power system, transmission lines are primarily constructed from conductor systems, insulation devices, tower support systems, lightning protection networks, and grounding systems. Among these, towers are critical load-bearing components. During the operation and maintenance of transmission lines, workers need to perform high-altitude operations on the towers, and according to relevant operational requirements, these workers must be equipped with reliable fall protection devices.

[0003] The fall arrestor self-locking devices currently widely used in the industry have the following technical defects:

[0004] Fall arrestor self-locking devices rely solely on visual indicators for directional guidance. In actual operation, the rate of misinstallation is relatively high due to limitations imposed by tower structure, lighting conditions, and the operator's field of vision. When operators install the fall arrestor self-locking device in the wrong direction, the device fails to provide passive protection, resulting in complete malfunction of the locking function. Utility Model Content

[0005] This utility model provides a fall arrestor to solve the above-mentioned technical defects in the prior art, avoid the fall arrestor from failing due to incorrect installation direction, ensure that the fall arrestor can only be used in the correct installation direction, and improve the safety of the fall arrestor.

[0006] This utility model provides a fall-prevention self-locking device, comprising:

[0007] The fall arrestor body is provided with an installation groove and a receiving groove, the installation groove and the receiving groove are interconnected, the installation groove is adapted to be connected with a guide rail, and the groove wall of the receiving groove is provided with a mating part;

[0008] Locking components, including:

[0009] A pivot is inserted through the fall arrestor body and located in the receiving groove;

[0010] A locking element is provided on the pivot and rotatably engages with the pivot.

[0011] A first elastic element is sleeved on the pivot, one end of the first elastic element is connected to the locking element, and the other end of the first elastic element is connected to the fall protection body.

[0012] An anti-tipping component is movably disposed on the locking component;

[0013] When the fall arrestor body is in an inverted state, the locking member extends from the receiving groove into the mounting groove, and the anti-inversion member extends out of the locking member under the action of gravity and cooperates with the mating part to limit the connection between the fall arrestor body and the guide rail.

[0014] According to the anti-fall self-locking device provided by this utility model, the anti-tipping component includes:

[0015] Limit segment;

[0016] A plug-in segment is connected to the limiting segment, wherein the cross-sectional area of ​​the plug-in segment is smaller than the cross-sectional area of ​​the limiting segment;

[0017] The locking member has a receiving cavity, and the inner wall of the receiving cavity has a limiting step. The limiting section and the plug-in section are both located in the receiving cavity. When the fall arrestor body is in an inverted state, the plug-in section extends out of the locking member and cooperates with the mating part to limit the movement. The limiting section abuts against the limiting step.

[0018] According to the anti-fall self-locking device provided by this utility model, the limiting segment is provided with:

[0019] A limiting plane, which is parallel to the axis of the limiting segment;

[0020] The locking member has an opening on its side wall, which communicates with the receiving cavity. The limiting section and the insertion section enter the receiving cavity through the opening.

[0021] According to the anti-fall self-locking device provided by this utility model, the cross-sectional shape of the limiting section is arc-shaped, the arc is a planar area surrounded by a circular arc and a corresponding chord, and the chord height of the arc is greater than the radius of the arc.

[0022] Wherein, the width of the opening is greater than or equal to the chord height of the bow shape, and the width of the opening is less than the diameter of the bow shape.

[0023] According to the fall arrestor provided by this utility model, the fall arrestor body is provided with:

[0024] The marking section indicates a direction consistent with the correct installation direction of the fall arrestor body.

[0025] The anti-fall self-locking device provided by this utility model also includes:

[0026] A limiting component is movably disposed on the fall arrestor body and is adapted to switch between a limiting position and a limiting release position;

[0027] The locking member is provided with a limiting hole. In the limiting position, the limiting component is inserted into the limiting hole to restrict the rotation of the locking member so that the locking member is completely disengaged from the guide rail. In the limiting release position, the limiting component is disengaged from the limiting hole, and the locking member can rotate freely.

[0028] According to the anti-fall self-locking device provided by this utility model, the limiting component includes:

[0029] A limiting body is inserted into the fall arrestor body and is adapted to switch between a limiting position and a limiting release position; the limiting body is provided with a first limiting part and a second limiting part near its two ends, respectively;

[0030] The second elastic element is sleeved on the limiting body, and the two ends of the second elastic element abut against the first limiting part and the second limiting part, respectively;

[0031] In the specified limiting position, the limiting body is inserted into the limiting hole, and the second elastic element is in an elastic deformation state; in the specified limiting release position, the limiting body is disengaged from the limiting hole, and the second elastic element is in a restoring elastic deformation state.

[0032] According to the anti-fall self-locking device provided by this utility model, the limiting component further includes:

[0033] A sleeve is detachably connected to the fall arrestor body. The sleeve is provided with a first limiting groove and a second limiting groove at intervals. Both the first limiting groove and the second limiting groove extend along the axial direction of the sleeve. The depth of the first limiting groove is greater than the depth of the second limiting groove.

[0034] Wherein, in the limiting position, the first limiting part is located in the first limiting groove; in the limiting release position, the first limiting part is located in the second limiting groove.

[0035] According to the anti-fall self-locking device provided by this utility model, the limiting body includes:

[0036] The shaft has an insertion portion at one end, the shape of which is adapted to the shape of the limiting hole;

[0037] The limiting end is detachably connected to the shaft body;

[0038] The first limiting part is disposed on the outer surface of the limiting end and extends along the axis of the limiting end; the second limiting part is disposed on the shaft near the insertion part and extends radially along the shaft.

[0039] According to the anti-fall self-locking device provided by this utility model, the limiting body further includes:

[0040] A trigger element is connected to the limiting end and is used to trigger the limiting end to move, thereby driving the shaft to switch between the limiting position and the limiting release position.

[0041] The fall arrestor provided by this utility model features an anti-inversion component movably mounted on the locking element and a mating part on the inner wall of the receiving groove of the fall arrestor body. When the fall arrestor is incorrectly installed upside down, the locking element extends into the installation groove, creating physical interference. The anti-inversion component automatically moves downward under gravity, forming a limit with the mating part on the inner wall of the receiving groove, thus preventing the fall arrestor body from connecting to the guide rail. At this time, even if pressure is forcibly applied to the fall arrestor body, it cannot be locked into the guide rail, achieving the anti-inversion protection function, preventing the fall arrestor from failing due to incorrect installation direction, ensuring that the fall arrestor can only be used in the correct installation direction, and improving the safety of the fall arrestor. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is one of the structural schematic diagrams of the anti-fall self-locking device provided in the embodiments of this utility model.

[0044] Figure 2 This is one of the exploded structural diagrams of the anti-fall self-locking device provided in this embodiment of the utility model.

[0045] Figure 3 This is the second exploded view of the anti-fall self-locking device provided in this embodiment of the utility model.

[0046] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0047] Figure 5 This is a cross-sectional view of the anti-fall self-locking device provided in this embodiment of the utility model.

[0048] Figure 6 This is one of the schematic diagrams of the usage state of the anti-fall self-locking device provided in this utility model embodiment (the anti-fall body is in an inverted state).

[0049] Figure 7 This is the second schematic diagram of the usage status of the fall arrestor provided in this embodiment of the utility model (the fall arrestor body is in a normal state).

[0050] Figure 8 This is the second structural schematic diagram of the anti-fall self-locking device provided in this embodiment of the utility model.

[0051] Figure label:

[0052] 10. Fall arrestor body; 11. Mounting slot; 12. Receiving slot; 13. Fitting part; 15. Marking part;

[0053] 20. Locking assembly; 21. Pivot; 22. Locking element; 221. Limiting hole; 222. Receiving cavity; 223. Limiting step; 224. Opening; 23. First elastic element; 24. Snap ring;

[0054] 30. Limiting component; 31. Limiting body; 311. Shaft; 312. Limiting end; 313. Trigger; 314. First limiting part; 315. Second limiting part; 316. Insertion part; 32. Second elastic element; 33. Sleeve; 331. First limiting groove; 332. Second limiting groove;

[0055] 40. Anti-tipping component; 41. Limiting section; 411. Limiting plane; 42. Insertion section;

[0056] 50. Guide wheel assembly; 51. First guide wheel; 52. Second guide wheel; 53. Third guide wheel. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0059] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Figure 1 This is one of the structural schematic diagrams of the anti-fall self-locking device provided in the embodiments of this utility model. Figure 2 This is one of the exploded structural diagrams of the anti-fall self-locking device provided in this embodiment of the utility model. Figure 3 This is the second exploded view of the anti-fall self-locking device provided in this embodiment of the utility model. Figure 4 yes Figure 3 Enlarged view of part A in the middle. Figure 5 This is a cross-sectional view of the anti-fall self-locking device provided in this embodiment of the utility model. Figure 6 This is one of the schematic diagrams of the usage state of the anti-fall self-locking device provided in this utility model embodiment (the anti-fall body is in an inverted state). Figure 7 This is the second schematic diagram of the usage status of the fall arrestor provided in this embodiment of the utility model (the fall arrestor body is in a normal state).

[0062] See Figures 1 to 7 This utility model provides a fall arrestor that can be applied to high-altitude work scenarios such as power, petroleum, communications, shipbuilding, construction, exterior wall spraying, and cleaning, and can prevent workers from accidentally falling during high-altitude operations.

[0063] This utility model embodiment takes the application of a fall arrestor in a power system as an example. The fall arrestor is used in the operation and maintenance of transmission lines to prevent workers from falling from heights during vertical climbing and horizontal movement at height.

[0064] Before use, the fall arrestor is installed on the guide rail. During the climbing process, the fall arrestor moves with the worker on the guide rail. When the worker falls accidentally, the fall arrestor uses a spring-loaded locking mechanism to work with the guide rail to brake the fall, thus protecting the worker's life and improving the safety of high-altitude operations.

[0065] The fall arrestor provided in this embodiment is suitable for high-altitude work scenarios such as high-voltage transmission line inspections that require frequent changes in movement direction. The fall arrestor, also known as a self-locking fall arrestor, includes a fall arrestor body 10, a locking component 20, and an anti-tipping component 40.

[0066] The fall arrestor body 10 can be a one-piece structure made of materials such as aluminum alloy. The fall arrestor body 10 can be a shell or a base. The fall arrestor body 10 is provided with a mounting groove 11 and a receiving groove 12, which are connected to each other. The mounting groove 11 extends along the length of the fall arrestor body 10 and is suitable for connection with the guide rail, so that it can move along the guide rail.

[0067] The shape and size of the mounting groove 11 should match the guide rail. For example, if the guide rail has a "T" shaped structure, then the mounting groove 11 should be a corresponding "T" shaped recess. A guide ramp can be provided at the end of the mounting groove 11. When the fall arrestor body 10 is installed on the guide rail, the guide ramp can guide the fall arrestor body 10 to smoothly slide into the correct installation position, ensuring convenient and accurate installation.

[0068] The locking assembly 20 includes a pivot 21, a locking member 22, and a first elastic member 23. The pivot 21 passes through the fall arrestor body 10. The locking member 22 is located in the receiving groove 12 and rotatably engages with the pivot 21. The first elastic member 23 is sleeved on the pivot 21, with one end of the first elastic member 23 connected to the locking member 22 and the other end of the first elastic member 23 connected to the fall arrestor body 10.

[0069] The pivot 21 can be made of high-strength, wear-resistant materials, such as stainless steel or alloy steel. Mounting holes for the pivot 21 are provided on the fall arrestor body 10 to ensure that the pivot 21 can pass through the fall arrestor body 10. The clearance between the pivot 21 and the mounting holes should be controlled within a small range to reduce the wobbling of the pivot 21 during rotation. Anti-detachment structures, such as limit discs, retaining rings 24, or nuts, can be provided at both ends of the pivot 21 to prevent it from accidentally detaching from the mounting holes of the fall arrestor body 10 during use.

[0070] The locking element 22 can be a cam structure, with the locking element 22 eccentrically positioned relative to the pivot 21. The circumferential surface of the locking element 22, away from the pivot 21, forms a locking surface, which can be designed as a progressively inclined surface to generate a self-reinforcing locking force upon impact. Furthermore, a bearing, such as a ball bearing or needle bearing, can be installed at the connection between the locking element 22 and the pivot 21 to reduce rotational friction and allow the locking element 22 to rotate freely.

[0071] The first elastic element 23 can be a single torsion spring or a symmetrically arranged double torsion spring. Under normal conditions, the first elastic element 23 forces the locking element 22 to maintain contact pressure with the guide rail.

[0072] When the fall acceleration exceeds the design threshold, the locking member 22 rotates around the pivot 21 towards the guide rail under the action of inertial force, and the locking surface of the locking member 22 contacts and presses against the guide rail to achieve locking. When it is necessary to unlock the locking function of the fall arrestor so that the fall arrestor can move with the worker, the locking member 22 is pushed to rotate around the pivot 21, so that the locking member 22 overcomes the preload of the first elastic member 23 and disengages from the guide rail.

[0073] The anti-tipping component 40 is movably mounted on the locking component 22, allowing free movement within the locking component 22. A mating part 13 is provided on the wall of the receiving groove 12, so that when the anti-fall body 10 is in an inverted state, such as... Figure 6 As shown, the locking member 22 extends into the mounting groove 11 from the receiving groove 12. The anti-tipping member 40 extends out of the locking member 22 under the action of gravity and cooperates with the mating part 13 to limit the connection between the anti-fall body 10 and the guide rail.

[0074] The structure of the mating part 13 can be a limiting groove or a limiting hole, or other structures capable of forming a limiting function. The specific structure of the mating part 13 is determined by the structure of the anti-tipping component 40. For example, the anti-tipping component 40 may be a rod-shaped structure, and the mating part 13 may be a limiting groove or a limiting hole. The end of the anti-tipping component 40 can be inserted into the limiting groove or limiting hole, thereby restricting the rotational freedom of the fall arrestor body 10 and preventing the fall arrestor self-locking device from being incorrectly installed on the guide rail in an inverted state, thus avoiding a dangerous accident.

[0075] The anti-tipping component 40 can be an integral structure or a telescopic rod structure. When the anti-tipping component 40 is a telescopic rod structure, the telescopic part of the anti-tipping component 40 can adopt a nested structure, such as a nested combination of an outer rod and an inner rod, and a limiting structure, such as a protrusion or a groove, is provided on the inner rod to cooperate and guide it with a corresponding structure on the outer rod.

[0076] See Figure 7When the fall arrestor body 10 is in the normal installation state, the anti-tipping component 40 is housed inside the locking component 22 under its own weight, which does not affect the normal operation of the fall arrestor self-locking device.

[0077] See Figure 6 When the fall arrestor body 10 is in an inverted state (incorrect installation state), the locking member 22 rotates and extends into the mounting groove 11, while the anti-tipping member 40 extends under its own weight and engages with the mating part 13 for limitation. Because the locking member 22 extends into the mounting groove 11, it interferes with the fit between the guide rail and the mounting groove 11. Even if pressure is forcibly applied to the fall arrestor body 10, it cannot be locked into the guide rail. Only when the installation direction is correctly adjusted (arrow pointing upwards) can the anti-tipping member 40 disengage from the mating part 13 under gravity, and the locking member 22 return to its movable position. This prevents the fall arrestor body 10 from being incorrectly connected to the guide rail, ensuring that the fall arrestor self-locking device can only be used with the correct installation direction.

[0078] To ensure the fitting accuracy between the anti-tipping component 40 and the mating part 13, a guide structure, such as a conical head, can be provided at the end of the anti-tipping component 40, so that it can fit more smoothly with the mating part 13 during the extension process.

[0079] It is understood that the fall arrestor provided in this embodiment of the present invention, by movably providing an anti-tipping component 40 on the locking component 22 and providing a mating part 13 on the inner wall of the receiving groove 12 of the fall arrestor body 10, allows the fall arrestor to be installed in reverse. When the fall arrestor is incorrectly installed upside down, the locking component 22 extends into the mounting groove 11, creating physical interference. The anti-tipping component 40 automatically moves downward under the influence of gravity, forming a limit with the mating part 13 on the inner wall of the receiving groove 12, thereby preventing the fall arrestor body 10 from connecting with the guide rail. At this time, even if pressure is forcibly applied to the fall arrestor body 10, it is impossible to lock the fall arrestor body 10 into the guide rail, thus achieving the anti-tipping protection function, preventing the fall arrestor from failing due to incorrect installation direction, ensuring that the fall arrestor can only be used in the correct installation direction, and improving the safety of the fall arrestor.

[0080] Continue reading Figure 4 In some embodiments of this utility model, the anti-tipping component 40 includes a limiting section 41 and a plug-in section 42. The plug-in section 42 is connected to the limiting section 41, and the cross-sectional area of ​​the plug-in section 42 is smaller than the cross-sectional area of ​​the limiting section 41.

[0081] The limiting section 41 and the plug-in section 42 can be manufactured as a single piece, for example, using metal casting or plastic injection molding. This design ensures the connection strength between the two and prevents breakage or separation during use.

[0082] The limiting section 41 can be designed with a circular or square cross-sectional shape. The cross-sectional shape of the insertion section 42 matches the shape of the mating part 13. When the mating part 13 is a circular hole, the insertion section 42 can be designed as a cylinder. A chamfer or conical transition section can also be provided at the end of the insertion section 42 to make it easier to align and insert the mating part 13 during insertion.

[0083] Continue reading Figure 4 The locking member 22 is provided with a receiving cavity 222. The shape of the receiving cavity 222 is adapted to the overall shape of the anti-tipping member 40, so that the limiting section 41 and the insertion section 42 can both be located in the receiving cavity 222.

[0084] For example, the anti-tipping component 40 is a roughly cylindrical structure, and the corresponding accommodating cavity 222 is a cylindrical cavity. The depth of the accommodating cavity 222 is slightly greater than the length of the anti-tipping component 40 in the accommodating state, so as to ensure that the anti-tipping component 40 can be completely accommodated in the accommodating cavity 222 without affecting the normal rotation of the locking component 22.

[0085] Continue reading Figure 4 The inner wall of the accommodating cavity 222 is provided with a limiting step 223, which is equivalent to the accommodating cavity 222 being a stepped hole. The limiting step 223 is used to limit the limiting section 41 to prevent the entire anti-tipping component 40 from falling out of the accommodating cavity 222.

[0086] When the fall arrestor is installed and used normally, the anti-tipping component 40 is completely contained within the receiving cavity 222. At this time, the limiting section 41 is located inside the receiving cavity 222 and does not contact the limiting step 223. The insertion section 42 is hidden in the hole limited by the limiting step 223 and will not interfere with the mating part 13.

[0087] When the fall arrestor body 10 is in an inverted state, the anti-tipping component 40 begins to move under the influence of gravity. The insertion section 42 extends from the receiving cavity 222 and inserts into the mating part 13. As the insertion section 42 extends, the limiting section 41 gradually approaches the limiting step 223. After the insertion section 42 is fully inserted into the mating part 13 for limiting, the limiting section 41 completely abuts against the limiting step 223. At this time, the limiting section 41 and the insertion section 42 of the anti-tipping component 40 work together to restrict the rotation of the fall arrestor body 10, preventing incorrect connection between the fall arrestor body 10 and the guide rail.

[0088] In addition, some guide grooves can be provided on the inner wall of the accommodating cavity 222, and protrusions or sliders can be provided on the corresponding sections of the anti-tipping component 40 to guide the anti-tipping component 40 to extend and retract along a preset path in the accommodating cavity 222, so as to prevent the anti-tipping component 40 from shifting or getting stuck.

[0089] Continue reading Figure 4In some embodiments of this utility model, a limiting plane 411 is provided on the limiting segment 41, and the limiting plane 411 is parallel to the axis of the limiting segment 41. The limiting plane 411 can be manufactured by machining, such as milling or grinding.

[0090] The locking member 22 has an opening 224 on its side wall. The shape of the opening 224 should match the combined shape of the limiting section 41 and the insertion section 42. When the limiting section 41 and the insertion section 42 are combined into an approximately stepped shaft structure, the shape of the opening 224 can be "T". The opening 224 is connected to the receiving cavity 222, and the limiting section 41 and the insertion section 42 enter the receiving cavity 222 through the opening 224.

[0091] During assembly, first align the limiting section 41 and the insertion section 42 with the corresponding positions of the opening 224 so that the anti-tipping component 40 enters the receiving cavity 222 from one side of the locking component 22. After the anti-tipping component 40 is fully inserted into the receiving cavity 222, it must be ensured that the limiting section 41 can move freely within the receiving cavity 222.

[0092] See Figure 7 When the fall arrestor is working normally, the limiting section 41 and the plug section 42 are located in the accommodating cavity 222 and will not affect the rotation of the locking member 22.

[0093] See Figure 6 When the fall arrestor body 10 is in an inverted state, the anti-tipping component 40 moves downward under the action of gravity. The limiting plane 411 on the limiting section 41 can ensure the stability of the anti-tipping component 40 during the movement process and accurately cooperate with the mating part 13 in a predetermined direction.

[0094] Continue reading 3 and Figure 4 In some embodiments of this utility model, the cross-sectional shape of the limiting segment 41 is arc-shaped. The arc is a planar area enclosed by a circular arc and a corresponding chord. The chord height of the arc is greater than the radius of the arc, and the chord height is the vertical distance from the vertex of the circular arc to the corresponding chord.

[0095] The width of opening 224 is greater than or equal to the chord height of the bow shape. This design ensures that the limiting segment 41 can smoothly pass through opening 224 and enter the receiving cavity 222. Furthermore, the width of opening 224 is less than the diameter of the bow shape. This design prevents the limiting segment 41 from accidentally dislodging from opening 224 during normal use. It also facilitates the positioning of the limiting segment 41 during assembly, ensuring its correct installation within the receiving cavity 222.

[0096] The length dimension of the opening 224 should be designed according to the overall length of the limiting section 41 and the insertion section 42 to ensure that the limiting section 41 and the insertion section 42 can completely enter the receiving cavity 222 through the opening 224 and will not be unnecessarily obstructed during the entry process.

[0097] Continue reading Figure 2 , Figure 3 and Figure 5 In some embodiments of this utility model, the fall arrestor body 10 is provided with an marking part 15, and the indicating direction of the marking part 15 is consistent with the correct installation direction of the fall arrestor body 10. The marking part 15 includes arrow markings, text markings, or graphic markings.

[0098] When the marking part 15 is an arrow, the arrow is a standard triangular arrowhead, and the arrow is a conspicuous color, such as red or yellow. The arrow is positioned on the surface of the fall arrestor body 10, for example, near the end of the fall arrestor body 10. When the fall arrestor body 10 is correctly installed on the guide rail, the arrow points in the same direction as the extension of the guide rail.

[0099] When text descriptions are used as the labeling section 15, the text content can include phrases such as "correct installation direction," and text can be combined with arrow symbols.

[0100] When the marking section 15 is a graphic marking, the connection relationship and relative direction between the fall arrestor body 10 and the guide rail can be clearly represented by lines and patterns.

[0101] During the operation and maintenance of power transmission lines, maintenance personnel frequently need to perform vertical climbing and high-altitude lateral movement operations. In lateral movement scenarios, changes in the operator's body position can easily cause deflection torque, which can exacerbate abnormal friction between the locking component 22 and the guide rail. Furthermore, under lateral vibration conditions, the locking component 20 is prone to resonant jamming, resulting in sluggish movement of the fall arrestor and difficulty in its use.

[0102] Therefore, please refer to the following: Figure 2 , Figure 3 and Figure 5 The fall arrestor provided in this embodiment of the present invention also includes a limiting component 30, which is movably disposed on the fall arrestor body 10 and is adapted to switch between a limiting position and a limiting release position.

[0103] The locking component 22 has a limiting hole 221. When the limiting component 30 is in the limiting position, it is inserted into the limiting hole 221 to restrict the rotation of the locking component 20, completely disengaging the locking component 22 from the guide rail and facilitating the lateral movement of the fall arrestor. In the limiting release position, the limiting component 30 disengages from the limiting hole 221, allowing the locking component 20 to rotate freely. At this time, the fall arrestor can move vertically. This process can be understood as the normal operation of the fall arrestor.

[0104] It should be noted that the lateral movement of the fall arrestor can be understood as a horizontal movement mode applicable to the crossarm of the tower. The vertical movement of the fall arrestor can be understood as vertical operation along the guide rail, that is, operation in vertical fall arrest mode.

[0105] It is understood that the fall arrestor provided in this embodiment of the present invention, by providing a limiting hole 221 on the locking member 22 and a limiting component 30 movably provided on the fall arrestor body 10, allows the limiting component 30 to switch between a limiting position and a limiting release position. Essentially, by adding the limiting component 30 (i.e., a mechanical changeover switch), the operator can quickly switch the fall arrestor between horizontal movement mode and vertical fall arrest mode by operating the limiting component 30. In horizontal movement mode, the locking member 22 is completely disengaged from the guide rail, facilitating free lateral movement of the fall arrestor; in vertical fall arrest mode, the limiting component 30 resets, bringing the locking member 22 into contact with the guide rail, ensuring a self-locking response upon impact.

[0106] When the limiting component 30 is in the limiting position, it is inserted into the limiting hole 221 and cooperates with the limiting hole 221 to rigidly lock the locking member 22. The locking member 22 is completely separated from the guide rail, eliminating the transmission path of lateral deflection torque caused by changes in the operator's body position and reducing abnormal frictional wear between the locking member 22 and the guide rail. Furthermore, after the limiting component 30 is inserted into the limiting hole 221 on the locking member 22, it forcibly constrains the rotational degree of freedom of the locking member 22, destroying the natural frequency matching condition of the locking member 22 under lateral vibration environment, fundamentally eliminating the resonant jamming phenomenon, enabling the fall arrestor to move smoothly laterally, and ensuring that the fall arrestor can still move smoothly in harsh environments such as strong winds and equipment vibration.

[0107] Continue reading Figures 2 to 5 In some embodiments of this utility model, the limiting component 30 includes a limiting body 31 and a second elastic member 32. The limiting body 31 passes through the fall arrestor body 10. Similarly, the fall arrestor body 10 is provided with a mounting hole along the width direction of the fall arrestor body 10 for accommodating the limiting body 31, ensuring that the limiting body 31 can pass through the fall arrestor body 10 and can move linearly back and forth in the mounting hole to change the position of the limiting body 31 relative to the locking member 22, so that it can switch between the limiting position and the limiting release position.

[0108] The limiting body 31 has a first limiting part 314 and a second limiting part 315 near its two ends. The second elastic member 32 is sleeved on the limiting body 31, with one end of the second elastic member 32 abutting against the first limiting part 314 and the other end of the second elastic member 32 abutting against the second limiting part 315.

[0109] See Figure 5When in the limit position, the limit body 31 is inserted into the limit hole 221, and the second elastic element 32 is in an elastic deformation state, that is, the second elastic element 32 has the ability to recover its elastic deformation, and the rotational freedom of the locking element 22 is constrained. When in the limit release position, the limit body 31 disengages from the limit hole 221, the second elastic element 32 is in a recovering elastic deformation state, and the locking element 22 can rotate automatically.

[0110] The second elastic element 32 may include a compression spring or a disc spring assembly. The second elastic element 32 is used to generate axial preload at the limiting position. The first limiting part 314 and the second limiting part 315 form a bidirectional mechanical constraint to ensure the rigid fit between the limiting body 31 and the limiting hole 221.

[0111] In this embodiment, the limiting body 31 can be understood as an integrally formed structure. For ease of installation, the second limiting part 315 can be set independently and fixed to the body of the limiting body 31 by means of threaded connection or welding.

[0112] Continue reading Figures 2 to 5 In an optional embodiment of this utility model, the limiting component 30 further includes a sleeve 33, which is detachably connected to the fall arrestor body 10, i.e., the sleeve 33 can be threadedly connected to the fall arrestor body 10 for easy disassembly and replacement. The sleeve 33 is provided with a first limiting groove 331 and a second limiting groove 332 spaced apart. Both the first limiting groove 331 and the second limiting groove 332 extend along the axial direction of the sleeve 33, and the depth of the first limiting groove 331 is greater than the depth of the second limiting groove 332.

[0113] See Figure 2 and Figure 5 When in the limit position, the first limit part 314 is located in the first limit groove 331, the limit body 31 is inserted into the limit hole 221, the second elastic member 32 is in an elastic deformation state, and the rotational freedom of the locking member 22 is constrained. When in the limit release position, the first limit part 314 is located in the second limit groove 332, the limit body 31 is disengaged from the limit hole 221, the second elastic member 32 is in a restoring elastic deformation state, and the locking member 22 can rotate automatically.

[0114] The depth of the first limiting groove 331 and the depth of the second limiting groove 332 form a stepped positioning reference. When the first limiting part 314 is embedded in the corresponding limiting groove, the axial position is locked by rigid contact with the groove wall of the corresponding limiting groove.

[0115] In this embodiment of the present invention, by providing a sleeve 33, the limiting component 30 can be integrated with the limiting body 31 and the second elastic element 32 during assembly to form a modular limiting component 30. This modular limiting component 30 is then installed as a whole on the fall arrestor body 10. The sleeve 33, as an independently replaceable component, has a limiting groove that localizes the high-wear area, facilitating quick disassembly and maintenance of the limiting component 30 and reducing its maintenance costs.

[0116] If the sleeve 33 is not provided, it can be understood that a stepped limiting groove is opened on the outer wall of the fall arrestor body 10, which serves the function of the sleeve 33. It is equivalent to integrating the structure of the sleeve 33 onto the fall arrestor body 10.

[0117] Continue reading Figures 2 to 5 In an optional embodiment of this utility model, the limiting body 31 includes a shaft 311 and a limiting end 312. The end of the shaft 311 is formed with a plug portion 316, and the shape of the plug portion 316 is adapted to the shape of the limiting hole 221.

[0118] To ensure the fitting accuracy between the insertion part 316 and the limiting hole 221, a guide structure, such as a tapered head, can be provided at the end of the insertion part 316, so that it can fit more smoothly with the limiting hole 221 during the insertion process.

[0119] The limiting end 312 is detachably connected to the shaft 311. The shaft 311 and the limiting end 312 can be connected by threads. That is, the limiting body 31 is composed of the separately set shaft 311 and the limiting end 312. Compared with the above embodiment, which integrally forms the limiting body 31 by molding the shaft 311 and the limiting end 312, this embodiment sets the shaft 311 and the limiting end 312 separately and connects them by threads, which can reduce the processing difficulty.

[0120] The first limiting part 314 is provided on the outer surface of the limiting end 312, and the first limiting part 314 extends along the axis of the limiting end 312 in a protruding structure. The second limiting part 315 is provided on the shaft 311 near the insertion part 316, and the second limiting part 315 extends radially along the shaft 311 in a disc-shaped structure.

[0121] Continue reading Figures 2 to 5 In an optional embodiment of this utility model, the limiting body 31 further includes a trigger 313, which is connected to the limiting end 312 and is used to trigger the limiting end 312 to move, thereby driving the shaft 311 to switch between the limiting position and the limiting release position, so as to facilitate the operation of the limiting body 31 to move.

[0122] The trigger element 313 can be a pull ring or a pull rod.

[0123] In other words, in the above embodiments, without the trigger 313, the end of the limiting body 31 can be used as the trigger position.

[0124] In some optional embodiments of this utility model, two first limiting portions 314 are provided, and the two first limiting portions 314 are symmetrically arranged with the axis of the limiting end 312 as the axis of symmetry. The number of first limiting grooves 331 and second limiting grooves 332 corresponds to the number of first limiting portions 314.

[0125] This configuration, with the first limiting part 314 symmetrically distributed along its axis, forms a force couple balance system. This decomposes external loads (such as lateral impact forces) into two components of equal magnitude and opposite direction, reducing the bending moment of the limiting body 31 and extending its service life. Simultaneously, the symmetrical arrangement of the first limiting part 314 results in more balanced operation and better stability.

[0126] See Figure 5 When the fall arrestor needs to move laterally, the trigger 313 is pulled to move, simultaneously driving the limiting end 312 and the shaft 311 to move, so that the first limiting part 314 is located in the first limiting groove 331. At this time, the insertion part 316 is inserted into the limiting hole 221, and cooperates with the limiting hole 221 to rigidly lock the locking part 22. The second elastic part 32 is in an elastic deformation state, and the locking part 22 is completely separated from the guide rail, eliminating the transmission path of the lateral deflection torque caused by the change of the operator's body position, and reducing the abnormal frictional wear between the locking part 22 and the guide rail. Moreover, after the limiting component 30 is inserted into the limiting hole 221 on the locking part 22, it forcibly constrains the rotational degree of freedom of the locking part 22, destroys the inherent frequency matching condition of the locking part 22 in the lateral vibration environment, fundamentally eliminates the resonant jamming phenomenon, and enables the fall arrestor to move smoothly laterally, ensuring that the fall arrestor can still move smoothly in harsh environments such as strong winds and equipment vibration.

[0127] When the fall arrestor needs to move vertically, the trigger 313 is pulled to move, which in turn drives the limiting end 312 and the shaft 311 to move, so that the first limiting part 314 is located in the second limiting groove 332. At this time, the second elastic element 32 returns to its elastic deformation state, so as to drive the limiting body 31 to disengage from the limiting hole 221, release the constraint on the rotational degree of freedom of the locking element 22, and ensure that the fall arrestor has the ability to prevent fall and lock when moving vertically.

[0128] Figure 8 This is the second structural schematic diagram of the anti-fall self-locking device provided in this embodiment of the utility model.

[0129] Continue reading Figure 2 , Figure 3 And see also Figure 8In some embodiments of this utility model, the fall arrestor further includes a guide wheel assembly 50, which is disposed on the groove wall of the mounting groove 11. The guide wheel assembly 50 is adapted to make rolling contact with the guide rail to reduce the friction between the fall arrestor body 10 and the guide rail.

[0130] The guide wheel assembly 50 includes a first guide wheel 51 and a second guide wheel 52, and the first guide wheel 51 and the second guide wheel 52 may have the same or different shapes.

[0131] When the shapes of the first guide wheel 51 and the second guide wheel 52 are different, the first guide wheel 51 is cylindrical and is disposed on both sides of the mounting groove 11, with its axis extending along the depth direction of the mounting groove 11. The first guide wheel 51 contacts the side of the guide rail.

[0132] The second guide wheel 52 has a T-shaped longitudinal section. It is positioned on both sides of the mounting groove 11, spaced a certain distance from the first guide wheel 51. The axis of the second guide wheel 52 extends along the depth of the mounting groove 11. The second guide wheel 52 contacts the side and bottom surfaces of the guide rail. Located below the fall arrestor, the first and second guide wheels 51 and 52 ensure smooth operation of the fall arrestor while reducing wear on the guide rail as it moves upwards along the guide rail.

[0133] On the side wall of the mounting groove 11, mounting positions are provided for both the first guide wheel 51 and the second guide wheel 52. The first guide wheel 51 and the second guide wheel 52 are fixed to the corresponding mounting positions by screws or guide rods.

[0134] Furthermore, the guide wheel assembly 50 also includes a third guide wheel 53, the axis of which extends along the width of the mounting groove 11. The third guide wheel 53 is located on the top wall of the mounting groove 11, and its position corresponds to that of the first guide wheel 51 and the second guide wheel 52 to form a stable three-point contact structure. This three-point contact guide wheel assembly structure improves the stability of the fall arrestor on the guide rail, reducing swaying and vibration. When the fall arrestor is installed on a vertical or inclined guide rail, the guide wheel assembly effectively prevents the fall arrestor from shifting or detaching from the guide rail due to its own weight or external interference.

[0135] When the fall arrestor moves up and down normally along the guide rail, the first guide wheel 51, the second guide wheel 52 and the third guide wheel 53 simultaneously roll into contact with the guide rail, providing precise path guidance for the fall arrestor's up and down movement, and ensuring that the locking component 20 can play a locking role in the working position.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fall arrestor with a self-locking mechanism, characterized in that, include: The fall arrestor body is provided with an installation groove and a receiving groove, the installation groove and the receiving groove are interconnected, the installation groove is adapted to be connected with a guide rail, and the groove wall of the receiving groove is provided with a mating part; Locking components, including: A pivot is inserted through the fall arrestor body and located in the receiving groove; A locking element is provided on the pivot and rotatably engages with the pivot. A first elastic element is sleeved on the pivot, one end of the first elastic element is connected to the locking element, and the other end of the first elastic element is connected to the fall protection body. An anti-tipping component is movably disposed on the locking component; When the fall arrestor body is in an inverted state, the locking member extends from the receiving groove into the mounting groove, and the anti-inversion member extends out of the locking member under the action of gravity and cooperates with the mating part to limit the connection between the fall arrestor body and the guide rail.

2. The anti-fall self-locking device according to claim 1, characterized in that, The anti-tipping component includes: Limit segment; A plug-in segment is connected to the limiting segment, wherein the cross-sectional area of ​​the plug-in segment is smaller than the cross-sectional area of ​​the limiting segment; The locking member has a receiving cavity, and the inner wall of the receiving cavity has a limiting step. The limiting section and the plug-in section are both located in the receiving cavity. When the fall arrestor body is in an inverted state, the plug-in section extends out of the locking member and cooperates with the mating part to limit the movement. The limiting section abuts against the limiting step.

3. The anti-fall self-locking device according to claim 2, characterized in that, The limiting segment is provided with: A limiting plane, which is parallel to the axis of the limiting segment; The locking member has an opening on its side wall, which communicates with the receiving cavity. The limiting section and the insertion section enter the receiving cavity through the opening.

4. The anti-fall self-locking device according to claim 3, characterized in that, The cross-sectional shape of the limiting segment is arc-shaped, which is a planar region enclosed by a circular arc and a corresponding chord, and the chord height of the arc is greater than the radius of the arc. Wherein, the width of the opening is greater than or equal to the chord height of the bow shape, and the width of the opening is less than the diameter of the bow shape.

5. The anti-fall self-locking device according to claim 1, characterized in that, The fall protection body is equipped with: The marking section indicates a direction consistent with the correct installation direction of the fall arrestor body.

6. The fall arrestor self-locking device according to any one of claims 1 to 5, characterized in that, Also includes: A limiting component is movably disposed on the fall arrestor body and is adapted to switch between a limiting position and a limiting release position; The locking member is provided with a limiting hole. In the limiting position, the limiting component is inserted into the limiting hole to restrict the rotation of the locking member so that the locking member is completely disengaged from the guide rail. In the limiting release position, the limiting component is disengaged from the limiting hole, and the locking member can rotate freely.

7. The anti-fall self-locking device according to claim 6, characterized in that, The limiting component includes: A limiting body is inserted into the fall arrestor body and is adapted to switch between a limiting position and a limiting release position; the limiting body is provided with a first limiting part and a second limiting part near its two ends, respectively; The second elastic element is sleeved on the limiting body, and the two ends of the second elastic element abut against the first limiting part and the second limiting part, respectively; In the specified limiting position, the limiting body is inserted into the limiting hole, and the second elastic element is in an elastic deformation state; in the specified limiting release position, the limiting body is disengaged from the limiting hole, and the second elastic element is in a restoring elastic deformation state.

8. The anti-fall self-locking device according to claim 7, characterized in that, The limiting component also includes: A sleeve is detachably connected to the fall arrestor body. The sleeve is provided with a first limiting groove and a second limiting groove at intervals. Both the first limiting groove and the second limiting groove extend along the axial direction of the sleeve. The depth of the first limiting groove is greater than the depth of the second limiting groove. Wherein, in the limiting position, the first limiting part is located in the first limiting groove; in the limiting release position, the first limiting part is located in the second limiting groove.

9. The anti-fall self-locking device according to claim 8, characterized in that, The limiting body includes: The shaft has an insertion portion at one end, the shape of which is adapted to the shape of the limiting hole; The limiting end is detachably connected to the shaft body; The first limiting part is disposed on the outer surface of the limiting end and extends along the axis of the limiting end; the second limiting part is disposed on the shaft near the insertion part and extends radially along the shaft.

10. The anti-fall self-locking device according to claim 9, characterized in that, The limiting body also includes: A trigger element is connected to the limiting end and is used to trigger the limiting end to move, thereby driving the shaft to switch between the limiting position and the limiting release position.

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