A fall protection structure and a pulley block comprising a fall protection structure

Abstract

The utility model relates to a kind of anti-falling structure and the pulley block containing anti-falling structure, including anti-falling cover, anti-falling shaft and rotating shaft;The cam groove and reverse anti-falling groove are equipped in the anti-falling cover, the reverse anti-falling groove is communicated cam groove;Rotating shaft one end is equipped with rope pulley, and rotating shaft other end is set in anti-falling cover, and rotating shaft one end set in anti-falling cover is equipped with mounting groove, the top of mounting groove is open, and the bottom of mounting groove is equipped with limit structure;Anti-falling shaft is equipped in the mounting groove;The anti-falling shaft is the taper structure of small top big bottom.The limit structure of the bottom of mounting groove of the utility model is favorable to realize the limit of anti-falling shaft, so that anti-falling shaft can only move outward from opening, so that anti-falling shaft can only move in one direction, eliminate the possibility that anti-falling shaft can move in both ends in rotary motion, exclude the possibility that anti-falling effect cannot be realized, improve the stability of pulley block anti-falling.

Description

Technical Field

[0001] This utility model relates to the internal structure of a pulley block for high-altitude operations, and in particular to a fall protection structure and a pulley block including the fall protection structure. Background Technology

[0002] In the current high-altitude work industry, the main method used is to manually descend to the working height using safety ropes. The entire process is difficult and dangerous, and requires high skills from the operators. Against this background, a multi-functional pulley system was developed. It uses an electric drill as a power source to transmit power to the multi-functional pulley system. The multi-functional pulley system transmits power to the rope wheel through an internal mechanism. The rope wheel winds the rope, and finally the multi-functional pulley system automatically lifts the operator from the ground to the working height.

[0003] Existing pulley systems suffer from transmission failure during use, causing the rope pulleys to move in the opposite direction, resulting in rapid rope descent and a high-altitude worker's fall, posing a significant safety hazard. Therefore, it is essential to incorporate fall arrest mechanisms into pulley systems. Current fall arrest mechanisms involve a rotating shaft with a mounting hole at one end of the fall arrest cover. The fall arrest shaft is inserted through this hole. During fall arrest, the shaft rotates in the opposite direction, causing the fall arrest shaft in the mounting hole to be thrown out by centrifugal force and locked into a fall arrest groove. However, because the fall arrest shaft is inserted through the mounting hole, there is a possibility that it may move along both ends of the mounting hole during the reverse rotation driven by the rotating shaft, potentially compromising the fall arrest effect. (Please confirm if this description is correct.) Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a fall-prevention structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fall protection structure, including a fall protection cover, a fall protection shaft and a rotating shaft;

[0006] The fall arrestor cover is provided with a cam groove and a reverse fall arrestor groove, and the reverse fall arrestor groove is connected to the cam groove.

[0007] The rotating shaft is driven to rotate by a drive mechanism. One end of the rotating shaft is provided with a rope wheel, and the other end of the rotating shaft is located inside the fall arrestor cover. The rotating shaft located inside the fall arrestor cover is provided with a mounting groove. The top of the mounting groove is open, and the bottom of the mounting groove is provided with a limiting structure.

[0008] The mounting groove is equipped with a fall-prevention shaft; the bottom end of the fall-prevention shaft is set in the mounting groove, and the top end of the fall-prevention shaft is located at the opening of the mounting groove; the fall-prevention shaft is a tapered structure with a smaller bottom end and a larger top end.

[0009] During normal operation, the rotating shaft drives the anti-fall shaft to rotate counterclockwise along the cam groove under the operation of the drive mechanism. In case of an accident, when the rotating shaft drives the anti-fall shaft to rotate clockwise along the cam groove, the anti-fall shaft is thrown out of the mounting groove and stuck into the reverse anti-fall groove under the action of centrifugal force, and the rotating shaft can no longer rotate, thus realizing the anti-fall function of the rotating shaft.

[0010] In a preferred embodiment of this utility model, the mounting groove is a conical structure with a large top and a small bottom.

[0011] In a preferred embodiment of the present invention, an exhaust channel is provided between the limiting structure and the outer wall of the rotating shaft, and the exhaust channel is connected to the mounting groove.

[0012] In a preferred embodiment of this utility model, the outer wall of the fall arrestor cover is provided with threads, the threads of the fall arrestor cover are provided on the cover, and the direction in which the fall arrestor cover is tightened on the cover is consistent with the rotation direction when the rotating shaft is used for fall prevention.

[0013] In a preferred embodiment of this utility model, a driven gear is sleeved on the rotating shaft, the driven gear meshes with the driving gear, the driving gear is disposed on the input shaft, and the input shaft is connected to the power input mechanism.

[0014] A pulley system comprising a fall protection structure of any of the above-mentioned technical solutions.

[0015] The beneficial effects of this utility model are as follows: The anti-fall structure of this utility model is used on pulley systems for high-altitude climbing. Its main function is to prevent the rope on the pulley from further loosening in the reverse direction when the pulley system accidentally rotates in the opposite direction, thus achieving the effect of preventing a fall. The limiting structure at the bottom of the mounting groove helps to limit the anti-fall shaft, so that the anti-fall shaft can only move outward from the opening, and can only move in one direction. This eliminates the possibility that both ends of the anti-fall shaft can move during rotation, thus eliminating the possibility that the anti-fall effect cannot be achieved. The conical anti-fall shaft can only move in one direction, that is, towards the top of the mounting groove. When the centrifugal force is thrown out, the conical movement of the anti-fall shaft is smoother, eliminating the risk of the anti-fall shaft getting stuck and improving the stability of the pulley system in preventing falls. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the anti-fall cover structure of this utility model;

[0019] Figure 4 yes Figure 3 Sectional view of AA in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of the pulley system of this utility model. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of the structure of the pulley system of this utility model. Figure 2 ;

[0022] Figure 7 This is a schematic diagram of the structure of the pulley system of this utility model. Figure 3 ;

[0023] Figure 8 This is a schematic diagram of the drive mechanism structure;

[0024] In the figure: 1. Fall arrest cover; 101. Cam groove; 102. Fall arrest groove; 2. Fall arrest shaft; 3. Rotating shaft; 301. Mounting groove; 3011. Limiting structure; 3012. Exhaust duct; 302. Cover; 4. Input shaft; 501. Drive gear; 502. Driven gear; 503. Rope pulley; 6. Rope winding space; 7. Rope. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] like Figures 1 to 8The diagram shows a fall protection structure, which includes a fall protection cover 1, a fall protection shaft 2, and a rotating shaft 3.

[0028] The fall arrestor cover 1 is provided with a cam groove 101 and a reverse fall arrestor groove 102, and the reverse fall arrestor groove 102 is connected to the cam groove 101.

[0029] The rotating shaft 3 is driven to rotate by a drive mechanism. One end of the rotating shaft 3 is provided with a rope wheel 6. The rope 7 passes through the rope winding space 601 of the rope wheel 6. The other end of the rotating shaft 3 is provided inside the fall arrest cover 1. The rotating shaft 3 provided inside the fall arrest cover 1 is provided with a mounting groove 301. The top end of the mounting groove 301 is an opening 3011. The bottom end of the mounting groove 301 is provided with a limiting structure 3012.

[0030] The mounting groove 301 is provided with a fall-prevention shaft 2; the bottom end of the fall-prevention shaft 2 is set in the mounting groove 301 and the bottom end of the fall-prevention shaft 2 is in contact with the limiting structure 3012, and the top end of the fall-prevention shaft 2 is located at the opening 3011 of the mounting groove 301; the fall-prevention shaft 2 is a conical structure with a small bottom end and a large top end.

[0031] During normal operation, the rotating shaft 3 drives the anti-fall shaft 2 to rotate counterclockwise along the cam groove 101 under the operation of the drive mechanism. In case of an accident, when the rotating shaft 3 drives the anti-fall shaft 2 to rotate clockwise along the cam groove 101, the top end of the anti-fall shaft 2 extends out from the opening 3011 of the mounting groove 301 under the action of centrifugal force, while the bottom end of the anti-fall shaft 2 remains in the mounting groove 301. After the top end of the anti-fall shaft 2 is thrown out from the mounting groove 301 and stuck into the reverse anti-fall groove 102, the rotating shaft 3 can no longer rotate, thus realizing the anti-fall function of the rotating shaft 3.

[0032] The fall arrestor structure of this application is a structural component of the pulley system and is installed on the cover 4 of the pulley system. As a preferred embodiment, the outer wall of the fall arrestor cover 1 in this application is provided with threads, and the fall arrestor cover 1 is threadedly mounted on the cover 4, and the tightening direction of the fall arrestor cover 1 on the cover 4 is consistent with the rotation direction of the rotating shaft 3 when it is used for fall arrest. Compared to the situation where the fall arrestor cover 1 is rigidly connected to the housing 4, making it prone to breakage when impacted by the fall arrestor shaft 2, this application uses a relatively soft threaded connection to fix the fall arrestor cover 1 to the housing 4. When the fall arrestor shaft 2 is engaged in the reverse fall arrestor groove 102 under the influence of the clockwise rotation of the rotating shaft 3, the impact of the fall arrestor shaft 2 on the fall arrestor cover 1 causes the fall arrestor cover to rotate slightly along the housing. Since the tightening direction of the fall arrestor cover 1 on the housing is consistent with the rotation direction of the rotating shaft 3 during fall arrest, that is, when the fall arrestor cover 1 rotates along the housing 4 under the impact force of the fall arrestor shaft 2, the connection between the fall arrestor cover 1 and the housing 4 becomes tighter and tighter, improving the connection stability between the fall arrestor cover 1 and the housing 4. Furthermore, the threaded connection between the fall arrestor cover 1 and the housing 4 also helps to buffer the impact of the fall arrestor shaft 2 on the fall arrestor cover 1, reducing the occurrence of damage caused by the rigid connection of the fall arrestor cover 1 to the housing, and improving the safety of the fall arrestor cover 1 during fall arrest.

[0033] In a preferred embodiment, the mounting groove 301 is a conical structure with a larger top and a smaller bottom, and the anti-fall shaft 2 is also a conical structure with a smaller bottom and a larger top. The anti-fall shaft 2 can only move in one direction, i.e., towards the top of the mounting groove 301. When thrown out by centrifugal force, the conical movement of the anti-fall shaft 2 is smoother, eliminating the risk of the anti-fall shaft 2 getting stuck. The conical shape of the mounting groove 301 matches the shape of the anti-fall shaft 2, making it easy for the top of the anti-fall shaft 2 to move out of the opening of the mounting groove 301. The limiting structure 3012 at the bottom of the mounting groove 301 helps to limit the anti-fall shaft 2, so that the anti-fall shaft 2 can only move outward from the opening 3011. This ensures that the anti-fall shaft 2 can only move in one direction, eliminating the possibility that both ends of the anti-fall shaft 2 can move during rotation, and eliminating the possibility that the anti-fall effect cannot be achieved.

[0034] The rotating shaft 3 is driven to rotate by a drive mechanism. The drive mechanism in this application includes an input shaft 501, a driving gear 502, and a driven gear 503. The driven gear 503 is sleeved on the rotating shaft 3. The driven gear 503 meshes with the driving gear 502. The driving gear 502 is disposed on the input shaft 501. The input shaft is connected to the power input mechanism.

[0035] In this application, the input shaft 501 has a power input hole at one end connected to the power input mechanism, which is an electric drill. One end of the rope 7 is fixed at a high position, and the other end passes through the rope winding space 601 of the rope pulley 6 and extends downwards. Power is supplied to the input shaft 1 through the power input mechanism, i.e., the electric drill, causing the input shaft 501 to rotate under the action of the electric drill. This, in turn, drives the drive gear 502 on the input shaft 501 to rotate. The drive gear 502 meshes with the driven gear 503, thereby achieving… The driving gear 502 drives the driven gear 503 to rotate. Since the driven gear 503 is mounted on the rotating shaft 3, which has a rope pulley 6, the rotation of the driven gear 503 drives the rotating shaft 3 to rotate counterclockwise. Ultimately, the rotating shaft 3 drives the rope 6 to rotate counterclockwise, allowing the rope 7 wound on the pulley block to pass through the rope winding space 601 on the rope pulley 6 in one direction, i.e., counterclockwise. The rope 7 continuously passes through the rope winding space 601, allowing the pulley block to rise to the height for high-altitude operations. When the rotating shaft 3 drives the rope 6 to rotate counterclockwise, the rotating shaft 3 simultaneously drives the fall arrestor shaft 2 to rotate counterclockwise along the cam groove 101. At this time, the rotating shaft 3 rotates normally within the cam groove 101 of the fall arrestor cover.

[0036] If the drive gear 502 is damaged or other unexpected situations occur, and the rotating shaft 3 rotates clockwise, the rope 7 can be stopped by the fall arrest mechanism. Specifically, when the driven gear 503 rotates clockwise, the rotating shaft 3 drives the fall arrest shaft 2 in its mounting groove 301 to rotate clockwise. Since the fall arrest shaft 2 is installed in the mounting groove 301 of the rotating shaft 3, the top end of the fall arrest shaft 2 is thrown out from the opening 3011 of the mounting groove 301 in the rotating shaft 3 under the action of centrifugal force. After the top end of the fall arrest shaft 2 moves along the trajectory of the cam groove 101, it is engaged with the anti-fall mechanism. The anti-fall groove 102 is inserted into the anti-fall shaft 2, while the bottom end of the anti-fall shaft 2 is always locked in the mounting groove 101 inside the rotating shaft 3. The anti-fall cover 1 is threaded onto the cover 4, thus ultimately achieving the goal of locking the rotating shaft 3 inside the anti-fall cover 1 by the anti-fall shaft 2, preventing the rotating shaft 3 from continuing to rotate. This avoids the situation where the rope wheel 6 rotates clockwise, causing the rope 7 to loosen rapidly, and avoids the situation where the pulley group descends rapidly due to damage to the drive gear 502 or other unexpected situations. This achieves the anti-fall function of the pulley group and greatly increases the safety protection performance of the pulley group.

[0037] In this application, a vent 302 is provided between the limiting structure 3012 and the outer wall of the rotating shaft 3, and the vent 302 connects to the mounting groove 301. This ensures that no atmospheric pressure environment is generated inside the rotating shaft 2, eliminating the risk that centrifugal force cannot throw the anti-fall shaft 2 out during a fall.

[0038] This utility model also discloses a pulley system, including the anti-fall structure of any of the above technical solutions.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. 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.

[0040] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A fall arrest arrangement, characterized by It includes a fall arrestor cover (1), a fall arrestor shaft (2), and a rotating shaft (3); The fall arrestor cover (1) is provided with a cam groove (101) and a reverse fall arrestor groove (102), and the reverse fall arrestor groove (102) is connected to the cam groove (101). The rotating shaft (3) is driven to rotate by a drive mechanism. One end of the rotating shaft (3) is provided with a rope wheel (6), and the other end of the rotating shaft (3) is provided inside the fall arrest cover (1). The rotating shaft (3) provided inside the fall arrest cover (1) has an installation groove (301) at one end. The top of the installation groove (301) is an opening (3011), and the bottom of the installation groove (301) is provided with a limiting structure (3012). The mounting groove (301) is provided with a fall protection shaft (2); the bottom end of the fall protection shaft (2) is set in the mounting groove (301), and the top end of the fall protection shaft (2) is located at the opening (3011) of the mounting groove (301); the fall protection shaft (2) is a conical structure with a small bottom end and a large top end. During normal operation, the rotating shaft (3) drives the anti-fall shaft (2) to rotate counterclockwise along the cam groove (101) under the operation of the drive mechanism. When an accident occurs, the rotating shaft (3) drives the anti-fall shaft (2) to rotate clockwise along the cam groove (101). Under the action of centrifugal force, the anti-fall shaft (2) is thrown out of the mounting groove (301) and stuck into the reverse anti-fall groove (102). The rotating shaft (3) can no longer rotate, thus realizing the anti-fall function of the rotating shaft (3).

2. The arresting structure of claim 1, wherein, An exhaust channel (302) is provided between the limiting structure (3012) and the outer wall of the rotating shaft (3), and the exhaust channel (302) is connected to the mounting groove (301).

3. The arresting structure of claim 2, wherein, The mounting groove (301) is a conical structure with a large top and a small bottom.

4. The arresting structure of claim 1, wherein, The outer wall of the fall arrestor cover (1) is provided with threads. The fall arrestor cover (1) is set on the cover (4) by the threads, and the direction of tightening the fall arrestor cover (1) on the cover (4) is consistent with the rotation direction of the rotating shaft (3) when it is preventing a fall.

5. The arresting structure of claim 1, wherein, A driven gear (503) is sleeved on the rotating shaft (3). The driven gear (503) meshes with the driving gear (502). The driving gear (502) is set on the input shaft (501). The input shaft (501) is connected to the power input mechanism.

6. A pulley block, characterized in that Includes the fall protection structure as described in any one of claims 1-5.

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