Multi-guide-rail universal falling protector

Abstract

The utility model discloses a multi-guide-rail universal falling protector which comprises framework plates, bottom wheels, cutter shaft assemblies, a small brake arm, a large brake arm, a rope tying plate and a torsional spring, the two framework plates are symmetrically arranged face to face, and the two framework plates are connected together through the front cutter shaft assembly and the rear cutter shaft assembly at the top; the front end and the rear end of the bottom of the inner side wall of the framework plate are each provided with a bottom wheel, and the wheel faces of the bottom wheels are outer cone wheel faces. The wheel surface of the bottom wheel close to the inside is a flat wheel surface; a fillet surface is arranged at the inner side edge of the flat wheel surface of the bottom wheel; the small brake arm and the large brake arm are hinged to the top through the cutter shaft assembly, and arc through grooves for avoiding the circular guide rail are formed in the bottom faces of the inner ends of the small brake arm and the large brake arm. The rope tying plate is hinged to the outer end of the small brake arm and the outer end of the large brake arm, and the torsional spring is connected to the cutter shaft assembly in a sleeving mode and elastically connected between the large brake arm and the framework plate. The double-arm braking device can be suitable for various types of guide rails, is high in universality, adopts double-arm braking, and is more stable and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anti -faller especially relates to a multi -guide rail general type anti -faller. BACKGROUND

[0002] In the construction and maintenance of wind power tower or power transmission and distribution line, the operating personnel often climb the tower or iron tower to work, and the anti -faller is installed on the guide rail and connected with the safety rope to climb, when the operating personnel fall, the anti -faller can be locked on the guide rail quickly, thereby avoiding the accident of operating personnel.

[0003] However, the existing guide rail type anti -faller can only be applied to one kind of section type guide rail, and different guide rails are often matched with different anti -fallers. If the operating personnel need to climb different iron towers in the work site, the anti -faller needs to be replaced if the guide rail types are inconsistent, which reduces the work efficiency.

[0004] For example, the utility model patent with the announcement number CN218652772U discloses a general guide rail type anti -faller, which comprises a first panel, a second panel, a bottom wheel, a brake knife, a side wheel and an upper roller, the first panel and the second panel are symmetrical and face each other, and the first panel and the second panel are connected together through a top connecting structure; a bottom guard plate is arranged on the inner side of the bottom of the first panel, and the bottom guard plate is provided with side wheels on the front and rear sides; the bottom guard plate is provided with a notch and is installed with a bottom wheel, the outer wheel surface of the bottom wheel is mainly a circular table surface, the circular table surface contacts the bottom surface of the guide rail top plate, the circular table surface projects inwardly as an inner flat wheel surface, and the inner flat wheel surface is a cylindrical surface; the brake knife is hinged to the top through a second fixed shaft of the top connecting structure, and the inner end of the brake knife can be clamped on the top surface of the guide rail; the top connecting structure is provided with a first fixed shaft in the front part and is assembled with an upper roller, and the upper roller is provided with a roller arc groove. Although the general guide rail type anti -faller in the patent technical scheme can be applied to various types of guide rails, the single brake knife is used for centering braking, and the brake is unstable. In order to adapt to different guide rails, the space between the brake knife bottom end and the bottom wheel needs to be large enough, so that when the brake cross section is small, the guide rail is matched, the margin is large, and the deflection is easy to occur, which causes the brake to be stuck and unable to reset.

[0005] Therefore, it is necessary to develop a multi -guide rail general type anti -faller. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a multi -guide rail general type anti -faller, which can be applied to various types of guide rails, has strong universality, and adopts double -arm braking, which is more stable and reliable.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme: Therefore, it is necessary to develop a multi -guide rail general type anti -faller. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a multi -guide rail general type anti -faller, which can be applied to various types of guide rails, has strong universality, and adopts double -arm braking, which is more stable and reliable.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] The utility model discloses a kind of multi-guide rail general type fall arresters, including framework board, bottom wheel, cutter shaft assembly, small brake arm, big brake arm, bolt rope board and torsion spring, two The framework board is symmetrically arranged face to face, two The framework board is connected together by the front and rear two The cutter shaft assembly of top;The bottom of the inner wall of the framework board is respectively provided with one The bottom wheel, the wheel surface of the bottom wheel is outer conical wheel surface, the outer conical wheel surface contacts wide guide rail and the wide wing plate inclined bottom surface of I-beam guide rail;The wheel surface of the bottom wheel is inner part and is flat wheel surface, the flat wheel surface contacts the narrow top plate flat bottom surface of narrow guide rail;The inner side edge of the flat wheel surface of the bottom wheel is provided with round corner surface, the round corner surface contacts the bottom surface of round guide rail;Small brake arm and big brake arm are respectively hinged in top by the cutter shaft assembly, the inner end bottom surface of small brake arm and big brake arm is provided with the circular arc through slot that gives way to the round guide rail;The inner end of small brake arm and big brake arm can be clamped on the top surface of narrow guide rail, wide guide rail, I-beam guide rail and round guide rail;Bolt rope board for connecting safety rope is hinged in the outer end of small brake arm and big brake arm, the torsion spring is sleeved on the cutter shaft assembly and is elastically connected between big brake arm and framework board.

[0009] Further, the inner side wall bottom of the framework board is provided with multiple protective plates, and the protective plates protect the bottom wheel.

[0010] Further, the framework board is coaxially provided with an inwardly protruding cutter shaft sleeve at the through hole position of the cutter shaft assembly, and the cutter shaft sleeve limits the side wall of the small brake arm or the big brake arm.

[0011] Further, the cutter shaft assembly includes a cutter shaft body and a cutter shaft fastening pin, the cutter shaft body is inserted into the cutter shaft sleeve at both ends and is locked by the cutter shaft fastening pin at the outer end, and a middle table with an increased diameter is arranged in the middle of the cutter shaft body, and the pin shaft hole of the small brake arm or the big brake arm is rotatably inserted into the middle table.

[0012] Further, an end groove is coaxially formed in the end face of the cutter shaft sleeve, and a limiting block is arranged on the side wall of the end groove; the end of the middle table is inserted into the end groove, and the end of the middle table is provided with a limiting gap in cooperation with the limiting block.

[0013] Further, a guide inclined surface is arranged on the inner side wall of the framework board at the insertion position of the wide wing plate of the wide guide rail and the I-beam guide rail.

[0014] Further, a weight-reducing groove is formed in the middle of the inner side wall of the framework board for reducing weight.

[0015] Further, the limiting middle wheel is arranged in parallel at the middle position of the two cutter shaft assemblies, is arranged on the upper portion of the framework plate through the middle wheel shaft, and the end portion of the middle wheel shaft is fixed on the framework plate through the middle wheel shaft fastening nail; a circular groove adapted to the top surface of the circular guide rail is formed at the middle position of the limiting middle wheel.

[0016] Further, the outer wheel surface of the limiting middle wheel at the two sides of the circular groove is arranged as a cylindrical surface, and the cylindrical surface can rollingly contact the top surface of the wide flange plate of the wide guide rail and the I-shaped guide rail.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0018] The utility model discloses a multi-guide rail universal fall protector, through the reasonable setting of the wheel surface appearance of the bottom wheel, so that the utility model can adapt to various cross section shapes of guide rails, and at the same time, a circular arc through groove is arranged on the inner end bottom surface, so that the circular guide rail does not deviate during use and is just centered and braked, the top surface of the guide rail is synchronously braked through the front and rear small brake arms and large brake arms, the braking point is increased, and the braking process is more stable and reliable. The utility model discloses a multi-guide rail universal fall protector, which can be applied to various types of guide rails and has high universality, and adopts double-arm braking, which is more stable and reliable.

[0019] In addition, the small brake arm or the large brake arm is axially limited through the integrally-formed cutter shaft sleeve, the connection strength with the cutter shaft assembly is increased relative to the mode of penetrating the spacer sleeve, the whole equipment is more firm, the thickened middle table is arranged in the middle of the cutter shaft main body, the pin shaft hole of the small brake arm or the large brake arm is rotationally connected, the rotation support structure is high in strength, the cutter shaft main body cannot rotate relative to the cutter shaft sleeve through the cooperation of the limiting block and the limiting gap, rotation occurs at the pin shaft hole of the small brake arm or the large brake arm, and the structure is more stable and reliable. The guide inclined surfaces are arranged in the middle portions of the front and rear ends of the inner side wall of the framework plate, the end surface of the guide rail can be smoothly guided, and the fall protector can be smoothly inserted into the guide rail; the weight of the equipment is reduced under the premise that the strength is not affected through the arrangement of the weight reduction grooves; the load of the climbing operator is reduced. The circular guide rail top surface can be limited through the limiting middle wheel, so that the circular guide rail is located at the middle seam position of the fall protector and cannot deviate to a position where the small brake arm or the large brake arm cannot effectively brake; the outer wheel surface of the limiting middle wheel at the two sides of the circular groove is arranged as a cylindrical surface, the cylindrical surface rollingly contacts the top surface of the wide flange plate of the wide guide rail and the I-shaped guide rail, the activity allowance of the wide guide rail and the I-shaped guide rail in the fall protector can be reduced, and the stability of braking is ensured. The installation direction of the utility model multi-guide rail universal fall protector when being installed on the guide rail is reminded through the arrangement of the arrow mark, and the reverse installation condition is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model discloses make further illustration to the utility model is explained below combining the drawing.

[0021] Figure 1 It is the three-dimensional structure schematic drawing of the utility model multi-guide rail general type anti-falling device;

[0022] Figure 2 It is the main view structure schematic drawing of the utility model multi-guide rail general type anti-falling device;

[0023] Figure 3 It is the main view structure schematic drawing of the utility model multi-guide rail general type anti-falling device;

[0024] Figure 4 It is Figure 2 It is the structure schematic drawing of the section A of the utility model;

[0025] Figure 5 It is Figure 3 It is the structure schematic drawing of the section B of the utility model;

[0026] Figure 6 It is the three-dimensional structure schematic drawing of the utility model skeleton board;

[0027] Figure 7 It is the three-dimensional structure schematic drawing of the utility model cutter shaft subassembly;

[0028] Figure 8 It is the schematic drawing of the utility model multi-guide rail general type anti-falling device installation on narrow guide rail;

[0029] Figure 9 It is the schematic drawing of the utility model multi-guide rail general type anti-falling device installation on wide guide rail;

[0030] Figure 10 It is the schematic drawing of the utility model multi-guide rail general type anti-falling device installation on I-shaped guide rail;

[0031] Figure 11 It is the schematic drawing of the utility model multi-guide rail general type anti-falling device installation on round guide rail.

[0032] Explanation of reference signs: 1, skeleton plate; 101, cutter shaft sleeve; 102, end groove; 103, limiting block; 104, guide inclined surface; 105, lightening groove; 2, bottom wheel; 201, bottom wheel shaft; 202, wheel shaft fastening nail; 203, flat wheel surface; 204, outer bevel wheel surface; 205, round corner surface; 3, cutter shaft assembly; 301, middle table; 302, limiting notch; 303, end screw hole; 304, cutter shaft fastening nail; 4, small brake arm; 401, circular arc through groove; 5, large brake arm; 6, top pin shaft assembly; 7, rope clamping plate; 701, rope clamping hole; 8, torsion spring; 9, limiting middle wheel; 901, circular ring groove; 10, middle wheel shaft; 11, middle wheel shaft fastening nail; 12, narrow guide rail; 13, wide guide rail; 14, I-shaped guide rail; 15, circular guide rail. DETAILED DESCRIPTION

[0033] The core of the utility model is to provide a kind of multiple guide rail general type fall arrestor, it can be applicable to multiple types of guide rail, and it is strong in universality, simultaneously using double-arm brake, it is more stable and reliable.

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model.Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0035] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation.

[0036] Reference drawings, Figure 1 It is the three-dimensional structure schematic diagram of the utility model multiple guide rail general type fall arrestor; Figure 2 It is the main view structure schematic diagram of the utility model multiple guide rail general type fall arrestor; Figure 3 It is the main view structure schematic diagram of the utility model multiple guide rail general type fall arrestor; Figure 4 It is Figure 2 It is the sectional view structure schematic diagram of middle A part; Figure 5 It is Figure 3 It is the sectional view structure schematic diagram of middle B part; Figure 6 It is the three-dimensional structure schematic diagram of skeleton plate in the utility model; Figure 7 It is the three-dimensional structure schematic diagram of cutter shaft assembly in the utility model;Figure 8 This is a schematic diagram of the multi-rail universal fall arrestor of this utility model installed on a narrow guide rail; Figure 9 This is a schematic diagram of the multi-rail universal fall arrestor of this utility model installed on a wide guide rail; Figure 10 This is a schematic diagram of the multi-rail universal fall arrestor of this utility model installed on an I-beam guide rail; Figure 11 This is a schematic diagram of the multi-rail universal fall arrestor of this utility model installed on a circular guide rail.

[0037] In one specific implementation, such as Figures 1 to 11 As shown, a multi-rail universal fall arrestor includes a frame plate 1, bottom wheels 2, a cutter shaft assembly 3, a small brake arm 4, a large brake arm 5, a rope-tying plate 7, and a torsion spring 8. Two frame plates 1 are symmetrically arranged facing each other, and are connected together by two front and rear cutter shaft assemblies 3 at the top. A bottom wheel 2 is respectively installed at the front and rear ends of the bottom inner wall of the frame plate 1. The wheel body of the bottom wheel 2 is cantilevered by a bottom wheel axle 201, and the bottom wheel axle 201 is installed in the axle hole of the frame plate 1 by axle fastening pins 202.

[0038] The outer surface of the bottom wheel 2 is divided into an outer conical surface 204, which contacts the sloping bottom surface of the wide flange of the wide guide rail 13 and the I-beam guide rail 14. The inner surface of the bottom wheel 2 is divided into a flat surface 203, which is a cylindrical surface and contacts the flat bottom surface of the narrow top plate of the narrow guide rail 12. The bottom wheel 2 has a rounded corner surface 205 on the inner edge of the flat surface 203, which contacts the bottom surface of the circular guide rail 15. The small brake arm 4 and the large brake arm 5 are hinged to the top by the cutter shaft assembly 3, with the small brake arm 4 located at the rear end and the large brake arm 5 located at the front end. The inner bottom surfaces of the small brake arm 4 and the large brake arm 5 are provided with arc-shaped through grooves 401 to allow the circular guide rail 15 to pass.

[0039] The inner ends of the small brake arm 4 and the large brake arm 5 can be locked onto the top surfaces of the narrow guide rail 12, the wide guide rail 13, the I-beam guide rail 14, and the round guide rail 15. A rope-tying plate 7 for connecting the safety rope is hinged to the outer ends of the small brake arm 4 and the large brake arm 5. The rope-tying plate 7 is respectively pin-hinged to the outer ends of the small brake arm 4 and the large brake arm 5 via a top pin assembly 6. The top pin assembly 6 includes a pin and end-limiting retaining springs. A torsion spring 8 is sleeved on the cutter shaft assembly 3, and the end of the torsion spring 8 is connected between the large brake arm 5 and the frame plate 1, causing the large brake arm 5 to return to its rearward position, with its inner end pressing against the top surface of the guide rail.

[0040] By reasonably setting the wheel face shape of the bottom wheel 2, the utility model can adapt to guide rails of various cross section shapes, and by setting the circular arc through slot 401 on the inner end bottom surface, the round guide rail 15 will not be deflected during use and will be braked in the middle; by setting the small brake arm 4 and the large brake arm 5 in front and back, the top surface of the guide rail is synchronously braked, the braking point is increased, and the braking process is more stable and reliable.

[0041] In a specific embodiment of the utility model, as shown in Figure 3 and Figure 6 , the inner side wall bottom of the framework plate 1 is provided with multiple protective plates, which protect the bottom wheel 2. The bottom wheel 2 is hiddenly installed between the protective plates. In particular, the protective plate on the outer side effectively protects the bottom wheel 2, avoiding the case that the obstacle adhering to the guide rail rib plate directly impacts the bottom wheel 2.

[0042] In a specific embodiment of the utility model, as shown in Figure 1 and Figure 6 , the framework plate 1 is coaxially provided with an inwardly protruding tool shaft sleeve 101 at the through hole position of the tool shaft assembly 3, and the tool shaft sleeve 101 is integrally formed on the inner side wall top of the framework plate 1. The tool shaft sleeve 101 is in contact with the side wall of the small brake arm 4 or the large brake arm 5, which axially limits them.

[0043] By using the integrally formed tool shaft sleeve 101 to axially limit the small brake arm 4 or the large brake arm 5, compared with the through connection sleeve method, the connection strength with the tool shaft assembly 3 is increased, so that the whole equipment is more firm.

[0044] Specifically, as shown in Figure 1 , Figure 2 , Figure 6 and Figure 7 , the tool shaft assembly 3 includes a tool shaft body and a tool shaft fastening nail 304, the tool shaft body is through connected in the tool shaft sleeve 101 at both ends and is locked by the tool shaft fastening nail 304 at the outer end. The end head of the tool shaft body is centrally provided with an end screw hole 303, and the tool shaft fastening nail 304 is screw connected in the end screw hole 303. The tool shaft body is provided with a middle table 301 with increased diameter in the middle, and the pin shaft hole of the small brake arm 4 or the large brake arm 5 is rotatably through connected on the middle table 301.

[0045] Specifically, as shown in Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, the end face of the cutter shaft sleeve 101 is coaxially provided with an end groove 102, and a limiting block 103 is arranged on the side wall of the end groove 102. The end of the middle table 301 is inserted into the end groove 102, and the end of the middle table 301 is provided with a limiting notch 302 matched with the limiting block 103.

[0046] By arranging the thickened middle table 301 in the middle of the cutter shaft body to rotate and connect the pin shaft hole of the small brake arm 4 or the large brake arm 5, the strength of the rotating support structure is large; by the cooperation of the limiting block 103 and the limiting notch 302, the cutter shaft body cannot rotate relative to the cutter shaft sleeve 101, so that rotation occurs at the pin shaft hole of the small brake arm 4 or the large brake arm 5, and the structure is more stable and reliable.

[0047] In a specific embodiment of the utility model, as shown in Figure 1 and Figure 6 As shown, the inner side wall of the framework plate 1 is provided with a guide inclined surface 104 at the wide wing plate insertion position of the wide guide rail 13 and the I-shaped guide rail 14.

[0048] Specifically, as shown in Figure 6 The inner side wall of the framework plate 1 is provided with a weight reduction groove 105 in the middle part for reducing weight.

[0049] By arranging the guide inclined surface 104 in the middle part of the inner side wall of the framework plate 1 at the front and rear ends, the end face of the guide rail can be smoothly guided, and the anti-falling device can be smoothly inserted into the guide rail; by arranging the weight reduction groove 105, the weight of the equipment is reduced without affecting the strength, and the load of the climbing operator is reduced.

[0050] In a specific embodiment of the utility model, as shown in Figure 1 and Figure 4 As shown, the utility model multi-guide rail universal anti-falling device further comprises a limiting middle wheel 9, a middle wheel shaft 10 and a middle wheel shaft fastening nail 11. The limiting middle wheel 9 is arranged in parallel at the middle position of the two cutter shaft assemblies 3 and is arranged on the upper part of the framework plate 1 through the middle wheel shaft 10, the end part of the middle wheel shaft 10 is fixed on the framework plate 1 through the middle wheel shaft fastening nail 11, and the middle wheel shaft fastening nail 11 is screw-connected with the threaded hole of the end part of the middle wheel shaft 10. The middle position of the limiting middle wheel 9 is provided with a circular groove 901 matched with the top surface of the circular guide rail 15.

[0051] Specifically, the outer wheel surface of the limiting middle wheel 9 on both sides of the circular groove 901 is arranged as a cylindrical surface, and the width of the limiting middle wheel 9 is matched with the spacing between the two framework plates 1. The cylindrical surface can rollingly contact the top surface of the wide wing plate of the wide guide rail 13 and the I-shaped guide rail 14.

[0052] By setting the limiting wheel 9, the top surface of the circular guide rail 15 can be limited, so that the circular guide rail 15 is in the middle seam position of the fall arrester, and will not swing to the position where the small brake arm 4 or the large brake arm 5 cannot brake effectively; by setting the outer wheel surface of the limiting wheel 9 on both sides of the annular groove 901 as a cylindrical surface, the cylindrical surface rolls in contact with the top surface of the wide wing plate of the wide guide rail 13 and the I-beam guide rail 14, which can reduce the movement margin of the wide guide rail 13 and the I-beam guide rail 14 in the fall arrester, and also ensure the stability of braking.

[0053] In one specific implementation, such as Figure 1 and Figure 2 As shown, an arrow mark is embossed on the outer wall of the skeleton plate 1, and the arrow mark indicates the upward direction.

[0054] The arrow markings serve as a reminder to workers to pay attention to the installation direction of this multi-rail universal fall arrestor when it is installed onto the rails, thus preventing inverted installation.

[0055] When this utility model of a multi-rail universal fall arrestor is in operation, such as Figures 8 to 11 As shown, install the universal multi-rail fall arrestor of this utility model onto the narrow rail 12, wide rail 13, I-beam rail 14, or round rail 15. Pay attention to the arrow markings during installation to avoid reverse installation. Connect the safety rope's loop to the rope-tying hole 701 of the rope-tying plate 7 via a shackle. When the worker climbs upwards along the rail, the safety rope pulls the rope-tying plate 7 upwards. The small brake arm 4 and the large brake arm 5 overcome the restoring force of the torsion spring 8, and the inner ends of the small brake arm 4 and the large brake arm 5 disengage from the top surface of the rail. The universal multi-rail fall arrestor of this utility model is then dragged upwards. In case of an accident, when the worker falls, the safety rope quickly pulls the rope-tying plate 7 downwards. The small brake arm 4 and the large brake arm 5 rotate around the cutter shaft assembly 3 at a certain angle, and the inner ends of the small brake arm 4 and the large brake arm 5 simultaneously lock onto the top surface of the rail, forming an emergency lock, thereby preventing the worker from continuing to fall. The braking mechanism differs slightly depending on the guide rail: When the fall arrestor is installed on the wide guide rail 13 and the I-beam guide rail 14, the inner ends of the small brake arm 4 and the large brake arm 5 simultaneously contact the flat top surfaces of the wide guide rail 13 and the I-beam guide rail 14, pressing the sloping bottom surfaces of the wide flanges of the wide guide rail 13 and the I-beam guide rail 14 onto the outer conical wheel surface 204 for locking. When installed on the narrow guide rail 12, the inner ends of the small brake arm 4 and the large brake arm 5 simultaneously contact the top surface of the narrow guide rail 12, pressing the flat bottom surface of the narrow top plate of the narrow guide rail 12 onto the flat wheel surface 203 for locking. When installed on the round guide rail 15, the ends of the arc-shaped through grooves 401 of the small brake arm 4 and the large brake arm 5 simultaneously contact the top surface of the round guide rail 15, pressing the bottom surface of the round guide rail 15 onto the rounded corner surface 205 for locking.

[0056] In summary, this utility model's multi-rail universal fall arrestor, through the reasonable design of the wheel surface shape of the bottom wheel 2, allows it to adapt to guide rails with various cross-sectional shapes. Simultaneously, the arc-shaped through groove 401 on the inner bottom surface prevents the circular guide rail 15 from swaying during use, ensuring it is precisely centered for braking. The small brake arm 4 and the large brake arm 5, positioned one in front of the other, synchronously brake the top surface of the guide rail, increasing the braking points and making the braking process more stable and reliable. This utility model's multi-rail universal fall arrestor is applicable to various types of guide rails, exhibiting strong versatility, and the dual-arm braking provides enhanced stability and reliability. Furthermore, the use of an integrally formed cutter shaft sleeve 101 to axially limit the small brake arm 4 or the large brake arm 5 increases the connection strength with the cutter shaft assembly 3 compared to a through-hole sleeve method, making the overall device more robust. By providing a thickened central platform 301 in the middle of the cutter shaft body to rotatably connect the pin hole of the small brake arm 4 or the large brake arm 5, the rotational support structure has high strength. Through the cooperation of the limiting block 103 and the limiting notch 302, the cutter shaft body cannot rotate relative to the cutter shaft sleeve 101, ensuring that rotation occurs at the pin hole of the small brake arm 4 or the large brake arm 5, making the structure more stable and reliable. By providing guide slopes 104 at the middle of the front and rear ends of the inner sidewall of the frame plate 1, the end face of the guide rail can be smoothly guided, facilitating the smooth insertion of this fall arrestor onto the guide rail. The weight-reducing groove 105 reduces the weight of the equipment without affecting strength, thus reducing the load on the climbing personnel. By setting the limiting wheel 9, the top surface of the circular guide rail 15 can be limited, ensuring that the circular guide rail 15 is positioned at the center seam of the fall arrester, preventing it from swaying to a position where the small brake arm 4 or the large brake arm 5 cannot effectively brake. By setting the outer wheel surfaces of the limiting wheel 9 on both sides of the annular groove 901 as cylindrical surfaces, these cylindrical surfaces roll in contact with the top surfaces of the wide wing plates of the wide guide rail 13 and the I-beam guide rail 14, reducing the movement margin of the wide guide rail 13 and the I-beam guide rail 14 within the fall arrester, thus ensuring braking stability. The arrow markings remind operators to pay attention to the installation direction of this multi-rail universal fall arrester when it is installed onto the guide rails, preventing inverted installation.

[0057] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A multi-rail universal fall arrestor, characterized in that: The system includes a frame plate (1), a bottom wheel (2), a cutter shaft assembly (3), a small brake arm (4), a large brake arm (5), a rope plate (7), and a torsion spring (8). Two frame plates (1) are arranged symmetrically facing each other and connected together by two cutter shaft assemblies (3) at the top. A bottom wheel (2) is provided at the front and rear ends of the bottom inner wall of each frame plate (1). The wheel surface of the bottom wheel (2) is divided into an outer conical wheel surface (204) on the outer side, which contacts the sloping bottom surface of the wide wing plate of the wide guide rail (13) and the I-beam guide rail (14). The wheel surface of the bottom wheel (2) is divided into a flat wheel surface (203) on the inner side, which contacts the flat bottom surface of the narrow top plate of the narrow guide rail (12). The bottom wheel (2) is located on the flat wheel surface (203). The inner edge is set as a rounded corner surface (205), which contacts the bottom surface of the circular guide rail (15); the small brake arm (4) and the large brake arm (5) are respectively hinged to the top by the cutter shaft assembly (3), and the bottom surface of the inner end of the small brake arm (4) and the large brake arm (5) is provided with an arc through groove (401) to allow the circular guide rail (15); the inner end of the small brake arm (4) and the large brake arm (5) can be clamped on the top surface of the narrow guide rail (12), the wide guide rail (13), the I-beam guide rail (14) and the circular guide rail (15); the rope plate (7) for connecting the safety rope is hinged to the outer end of the small brake arm (4) and the large brake arm (5), and the torsion spring (8) is sleeved on the cutter shaft assembly (3) and elastically connected between the large brake arm (5) and the skeleton plate (1).

2. The multi-rail universal fall arrestor according to claim 1, characterized in that: The bottom of the inner wall of the frame plate (1) is provided with multiple protective plates, which protect the bottom wheel (2).

3. The multi-rail universal fall arrestor according to claim 1, characterized in that: The skeleton plate (1) has an inwardly protruding cutter shaft sleeve (101) coaxially provided at the through hole of the cutter shaft assembly (3), and the cutter shaft sleeve (101) limits the side wall of the small brake arm (4) or the large brake arm (5).

4. The multi-rail universal fall arrestor according to claim 3, characterized in that: The cutter shaft assembly (3) includes a cutter shaft body and a cutter shaft fastening pin (304). Both ends of the cutter shaft body are inserted into the cutter shaft sleeve (101) and the outer end is locked by the cutter shaft fastening pin (304). A central platform (301) with an increased diameter is provided in the middle of the cutter shaft body. The pin hole of the small brake arm (4) or the large brake arm (5) can be rotatably inserted into the central platform (301).

5. The multi-rail universal fall arrestor according to claim 4, characterized in that: The end face of the cutter shaft sleeve (101) is coaxially provided with an end groove (102), and a limiting block (103) is provided on the side wall of the end groove (102); the end of the middle platform (301) is inserted into the end groove (102), and the end of the middle platform (301) is provided with a limiting notch (302) in conjunction with the limiting block (103).

6. The multi-rail universal fall arrestor according to claim 1, characterized in that: The inner wall of the skeleton plate (1) is provided with a guide slope (104) at the insertion part of the wide wing plate of the wide guide rail (13) and the I-beam guide rail (14).

7. The multi-rail universal fall arrestor according to claim 1, characterized in that: The inner wall of the skeleton plate (1) is provided with a weight-reducing groove (105) for reducing weight.

8. The multi-rail universal fall arrestor according to claim 1, characterized in that: It also includes a limiting wheel (9), a wheel shaft (10), and a wheel shaft fastening pin (11). The limiting wheel (9) is arranged in parallel between the two cutter shaft assemblies (3) and is mounted on the upper part of the skeleton plate (1) through the wheel shaft (10). The end of the wheel shaft (10) is fixed on the skeleton plate (1) through the wheel shaft fastening pin (11). The limiting wheel (9) has an annular groove (901) at the middle position that is adapted to the top surface of the circular guide rail (15).

9. The multi-rail universal fall arrestor according to claim 8, characterized in that: The outer wheel surface of the limiting wheel (9) on both sides of the annular groove (901) is set as a cylindrical surface, and the cylindrical surface can roll in contact with the top surface of the wide wing plate of the wide guide rail (13) and the I-beam guide rail (14).

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