A multifunctional pulley block

Abstract

This utility model relates to a multifunctional pulley system, including a first housing, a second housing, a power transmission mechanism, a first anti-fall mechanism, and a universal ring. The first housing and the second housing are connected by a rotating shaft, and the universal ring is provided at the bottom of the first housing. The power transmission mechanism is located on the side of the second housing away from the first housing, and the power transmission mechanism includes a driving gear, a driven gear, and a driven gear shaft. The driven gear shaft passes through the first housing and connects to a rope wheel. The rope wheel has a rope winding space on its circumference, and a rope is wound in the rope winding space. The first anti-fall mechanism is located at the lower part of the driven gear. By setting the first anti-fall structure at the lower part of the driven gear, in the event of damage to the driving gear, it effectively prevents the driven gear shaft from driving the rope wheel in the opposite direction, preventing the rope on the rope from loosening rapidly, and preventing the pulley system from rapidly sliding down and posing a safety hazard to workers at height. This achieves the anti-fall function of the pulley system and greatly increases its safety protection performance.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude operation technology, and in particular to a multifunctional pulley block. Background Technology

[0002] In the current high-altitude operations industry, the main method used is to manually descend to the working height using safety ropes. This process is difficult, dangerous, and requires highly skilled operators. Against this backdrop, 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 then transmits power to the rope wheel through an internal mechanism. The rope wheel drives the rope, and finally, the multi-functional pulley system automatically lifts the operator from the ground to the working height.

[0003] Existing pulley systems have a problem during use: damage to the power transmission mechanism can cause the rope pulley to move in the opposite direction, resulting in the rope being lowered rapidly and causing workers to fall quickly, posing a significant safety hazard. Therefore, it is necessary to combine fall protection structures with pulley systems. 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 multifunctional pulley block.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a multi-functional pulley block, including a first cover, a second cover, a power transmission mechanism, a first anti-fall mechanism, and a universal ring;

[0006] The first cover and the second cover are connected by a pivot shaft. The bottom of the first cover is provided with a universal ring. The second cover is provided with a power transmission mechanism on the side away from the first cover. The power transmission mechanism includes a driving gear, a driven gear, and a driven gear shaft.

[0007] The driving gear is connected to the power input mechanism. A driven gear shaft is provided on one side of the driving gear. A driven gear is provided on the driven gear shaft. The driven gear meshes with the driving gear. The driven gear shaft passes through the first cover and is connected to a rope wheel. A rope winding space is provided on the circumference of the rope wheel. A rope is wound in the rope winding space.

[0008] The first fall protection mechanism is located at the lower part of the driven gear. The first fall protection mechanism includes a compression spring and a one-way tooth. One end of the one-way tooth is a rotating end and the other end is a free end. The rotating end is mounted on the second cover through a rotating shaft. A compression spring is provided between the free end of the one-way tooth and the inner wall of the second cover. The teeth on the one-way tooth are located at the free end, and the teeth face the driven gear and mesh with the driven gear.

[0009] When the driven gear rotates counterclockwise, the free end of the one-way tooth is driven counterclockwise by the driven gear to lift the compression spring, causing the free end of the one-way tooth to rotate along the rotating end, and the driven gear can rotate normally counterclockwise.

[0010] When the driven gear rotates clockwise, the teeth of the one-way gear mesh with the driven gear, and the driven gear cannot rotate clockwise.

[0011] In a preferred embodiment of this utility model, the first cover is provided with a pressing structure on the side away from the second cover; the pressing structure is provided along the rope end of the rope wheel, and a turning friction block is provided at the top of the pressing structure; one end of the rope is wound along the rope winding space of the rope wheel and passes through the turning friction block and moves downward under the action of the worker's own weight; and the rope extending from the turning friction block squeezes the pressing structure towards the rope wheel under the action of the worker's own weight.

[0012] In a preferred embodiment of this utility model, a rope unlocking part is provided on the side of the second cover facing the first cover. The rope unlocking part includes a cam, a cam connecting shaft, and a cam follower shaft. The cam connecting shaft passes through both sides of the second cover, and a cam is provided on the side of the second cover facing the first cover via the cam connecting shaft. One end of the cam follower shaft is provided on one side of the cam, and the cam follower shaft moves under the action of the cam. A handle is provided on the cam connecting shaft on the other side of the second cover, and a torsion spring is provided inside the handle. The other end of the cam follower shaft is disposed on the first cover.

[0013] In a preferred embodiment of the present invention, the second cover is further provided with a cam track groove and a follower shaft track groove on the side facing the first cover. The cam is located in the cam track groove, and the cam moves along the cam track groove under the action of the cam connecting shaft. The cam track groove is arc-shaped.

[0014] The cam follower shaft is located in the follower shaft track groove, and the cam follower shaft moves along the follower shaft track groove under the action of the cam.

[0015] In a preferred embodiment of the present invention, the second cover is provided with a rotating swing shaft on the side facing the first cover, and the first cover is provided with an arc groove, the rotating swing shaft moving along the arc groove.

[0016] In a preferred embodiment of this utility model, the pressing structure includes multiple pressing shafts and pressing sleeves disposed on the corresponding pressing shafts. The pressing shafts are arranged around the circumference of the rope outlet end of the rope wheel. The rope extending from the self-steering friction block presses the pressing sleeves toward the rope wheel under the action of the worker's own weight. The multiple pressing sleeves abut against the rope in the use state and move away from the rope in the unlocked state.

[0017] In a preferred embodiment of the present invention, a second anti-fall mechanism is further included. The second anti-fall mechanism includes an anti-fall shaft and an anti-fall cover. One end of the driven gear shaft extending out of the second cover is disposed inside the anti-fall cover, and one end of the driven gear shaft located inside the anti-fall cover is provided with a mounting hole. The anti-fall shaft is disposed in the mounting hole, and the anti-fall shaft extends out of the mounting hole and protrudes from the driven gear shaft.

[0018] The fall arrestor cover has an eccentric groove inside, and the eccentric groove has a fall arrestor groove protruding towards the outer contour of the fall arrestor cover. The two points connecting the eccentric groove and the fall arrestor groove are the start point and the end point of the stroke, respectively. When the fall arrestor shaft rotates counterclockwise, the fall arrestor shaft passes through the start point and the end point of the stroke in sequence. The distance between the start point of the fall arrestor groove and the outer contour of the fall arrestor cover is greater than the distance between the end point of the fall arrestor groove and the outer contour of the fall arrestor cover.

[0019] In a preferred embodiment of the present invention, the eccentric groove includes a first eccentric groove and a second eccentric groove that are connected to each other. The first stroke start point of the first eccentric groove is connected to the second stroke end point of the second eccentric groove through a first anti-fall groove, and the first stroke end point of the first eccentric groove is connected to the second stroke start point of the second eccentric groove through a second anti-fall groove.

[0020] Furthermore, the second stroke end point of the second eccentric groove is located closer to the outer contour of the fall arrestor cover than the first stroke start point of the first eccentric groove, and the first stroke end point of the first eccentric groove is located closer to the outer contour of the fall arrestor cover than the second stroke start point of the second eccentric groove.

[0021] The anti-fall shaft moves counterclockwise along the trajectory of the driven gear shaft, which is: first stroke start point, second stroke end point, second eccentric groove, second stroke start point, first stroke end point, first eccentric groove, first stroke start point, and so on.

[0022] The trajectory of the fall arrest shaft following the clockwise movement of the driven gear shaft is either the first stroke start point, the first eccentric groove, the first stroke end point, and the second fall arrest groove, or the second stroke start point, the second eccentric groove, the second stroke end point, and the first fall arrest groove.

[0023] In a preferred embodiment of the present invention, the power transmission mechanism further includes an input shaft, one end of which is connected to a power input mechanism, and the other end of which is connected to one end of a drive gear, and the other end of the drive gear is fitted with a gear sleeve.

[0024] In a preferred embodiment of the present invention, the first cover is further provided with a first panel, which covers the upper part of the rope wheel, and the second cover is provided with a second panel, which covers the upper parts of the driving gear and the driven gear.

[0025] The beneficial effects of this utility model are as follows: By setting a first anti-fall structure at the lower part of the driven gear of the power transmission mechanism, when the driving gear is damaged, it effectively prevents the driven gear shaft from driving the rope wheel to rotate in the opposite direction, avoids the rapid loosening of the rope on the rope, and prevents the pulley block from rapidly sliding down, which could cause safety hazards to workers at heights. This realizes the anti-fall function of the pulley block and greatly increases the safety protection performance of the pulley block. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 3 ;

[0029] Figure 4 This is a schematic diagram of the structure of this utility model. Figure 4 ;

[0030] Figure 5 This is a schematic diagram of the connection structure between the power transmission mechanism and the rope wheel of this utility model;

[0031] Figure 6 This is a schematic diagram of the power transmission mechanism of this utility model;

[0032] Figure 7 This is a schematic diagram of the first fall protection mechanism of this utility model;

[0033] Figure 8 This is a structural diagram showing the position of the pressure line structure of this utility model on the first cover.

[0034] Figure 9 This is a schematic diagram of the pressure line structure of this utility model;

[0035] Figure 10 This is a schematic diagram of the second housing structure of this utility model;

[0036] Figure 11 This is a schematic diagram of the first housing structure of this utility model;

[0037] Figure 12 This is a schematic diagram of the handle structure of this utility model;

[0038] Figure 13 This is a diagram showing the positional relationship between the driven gear shaft and the anti-fall cover of this utility model;

[0039] Figure 14 This is a schematic diagram of the anti-fall cover structure of this utility model;

[0040] Figure 15 This is a schematic diagram of the anti-fall shaft structure of this utility model;

[0041] Figure 16 This is a schematic diagram of the anti-fall shaft structure within the eccentric groove of this utility model;

[0042] Figure 17 This is a schematic diagram of the eccentric groove structure of this utility model. Figure 1 ;

[0043] Figure 18 This is a schematic diagram of the eccentric groove structure of this utility model. Figure 2 ;

[0044] Figure 19 This is a schematic diagram of the connection between the driven gear shaft and the anti-fall shaft of this utility model;

[0045] In the diagram: First cover 1; Arc groove 101; Second cover 2; Rotating swing shaft 201; Power transmission mechanism 3; Input shaft 301; Driving gear 302; Driven gear 303; Driven gear shaft 304; Gear sleeve 305; First anti-fall mechanism 4; Compression spring 401; One-way gear 402; Rotating end 4021; Free end 4022; Universal ring 5; Rope pulley 6; Rope winding space 601; Rope 7; Line pressing structure 8; Line pressing shaft 801; Line pressing sleeve 802; Steering friction block 803; Roller 804; Unlocking part 9; Cam 9 01; Cam connecting shaft 902; Cam follower shaft 903; Cam track groove 904; Follower shaft track groove 905; Handle 10; Torsion spring 1001; Anti-fall shaft 11; Anti-fall cover 12; Eccentric groove 13; First eccentric groove 1301; Second eccentric groove 1302; Anti-fall groove 14; First anti-fall groove 1401; Second anti-fall groove 1402; Rotating shaft 15; First panel 16; Second panel 17; Stroke start point a; Stroke end point b; First stroke start point A; First stroke end point B; Second stroke start point C; Second stroke end point D. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] like Figures 1 to 19 The multi-functional pulley system shown includes a first housing 1, a second housing 2, a power transmission mechanism 3, a first anti-fall mechanism 4, and a universal ring 5. The universal ring 5 is designed to facilitate the fixing of hooks, and the hooks are tied to the workers by ropes. The pulley system can lift workers to the required height for high-altitude operations.

[0049] The first cover 1 and the second cover 2 are connected by a rotating shaft 15. The bottom end of the first cover 1 is provided with a universal ring 5. The second cover 2 is provided with a power transmission mechanism 3 on the side away from the first cover 1. The power transmission mechanism 3 includes a driving gear 302, a driven gear 303 and a driven gear shaft 304.

[0050] The driving gear 302 is connected to the power input mechanism. A driven gear shaft 304 is provided on one side of the driving gear 302. A driven gear 303 is provided on the driven gear shaft 304. The driven gear 303 meshes with the driving gear 302. The driven gear shaft 304 passes through the first cover 1 and is connected to the rope wheel 6. The rope wheel 6 has a rope winding space 601 around its circumference. A rope 7 is wound in the rope winding space 601. The power transmission mechanism 3 in this application also includes an input shaft 301. One end of the input shaft 301 is connected to the power input mechanism, and the other end of the input shaft 301 is connected to one end of the driving gear 302. A gear sleeve 305 is fitted on the other end of the driving gear 302.

[0051] The first fall protection mechanism 4 is located at the lower part of the driven gear 303. The first fall protection mechanism 4 includes a compression spring 401 and a one-way tooth 402. One end of the one-way tooth 402 is a rotating end 4021 and the other end is a free end 4022. The rotating end 4021 is mounted on the second cover 2 through a rotating shaft 15. A compression spring 401 is provided between the free end 4022 of the one-way tooth 402 and the inner wall of the second cover 2. The teeth on the one-way tooth 402 are located at the free end 4022, and the teeth face the driven gear and mesh with the driven gear 302.

[0052] When the driven gear 303 rotates counterclockwise, the free end 4022 of the one-way tooth 402 is driven counterclockwise by the driven gear 303 to push the spring 401 upward, so that the free end 4022 of the one-way tooth 402 rotates along the rotating end 4021, and the driven gear 303 can rotate normally counterclockwise.

[0053] When the driven gear 303 rotates clockwise, the teeth of the one-way gear 402 mesh with the driven gear 303, and the driven gear 303 cannot rotate clockwise.

[0054] In this application, the input shaft 301 has a power input hole at one end connected to the power input mechanism, which is an electric drill. One end of the rope in this application 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 301 through the power input mechanism, i.e., the electric drill, causing the input shaft 301 to rotate under the action of the electric drill. This, in turn, drives the drive gear 302 connected to the input shaft 301 to rotate. The drive gear 302 meshes with the driven gear 303, thereby enabling the drive gear 302 to drive the driven gear 303 to rotate. Since the driven gear 303... A rope pulley 6 is mounted on the driven gear shaft 304. During the rotation of the driven gear 303, the driven gear shaft 304 rotates, ultimately causing the rope 6 to rotate. This allows the rope 7 wound on the pulley block to pass through the rope winding space 601 on the rope pulley 6 in one direction (counterclockwise). The rope 7 continuously passes through the rope winding space 601, allowing the pulley block to rise to the desired height for high-altitude operations. In this application, the rotating end 4021 of the one-way gear 402 is mounted on the second cover 2 via a rotating shaft 15, and the free end 4022 of the one-way gear 402... A compression spring 401 is provided between the drive gear 302 and the inner wall of the second housing 2. When the drive gear 302 rotates clockwise, driving the driven gear 303 to rotate counterclockwise, the driven gear 303 and the one-way gear 402 mesh. When the driven gear rotates counterclockwise, the free end 4022 of the one-way gear 402 pushes the compression spring 4021 upward, causing the free end 4022 of the one-way gear 402 to rotate along the rotating end 4021. The driven gear 303 can rotate normally counterclockwise, that is, the compression spring 401 achieves soft limiting of the one-way gear 402. In case of an accident, such as damage to the drive gear 302, when the driven gear 303 rotates clockwise, the one-way gear 402 will not be able to rotate. The teeth of gear 4 mesh with the driven gear 303. In this application, the one-way gear 4 is a ratchet, which prevents the driven gear 303 from rotating clockwise and thus prevents the driven gear 303 from moving in the opposite direction, i.e., clockwise. This effectively avoids the fall caused by the reverse movement of the rope wheel 6, realizes the anti-fall function of the pulley group, and realizes the safe use of the pulley group. In this application, a gear sleeve 305 is provided on the end of the driving gear 302. The setting of the gear sleeve 305 improves the overall structural stability between the teeth on the driving gear 302, extends the service life of the driving gear 302, and improves the safety of the pulley group transmission structure.

[0055] In a preferred embodiment, the first anti-fall mechanism 4 in this application comprises two parts, with the two first anti-fall structures 4 respectively disposed on both sides of the driving gear 302; that is, the arrangement of the two first anti-fall structures achieves two-fold anti-fall protection for the driven gear 303, ensuring the stability and safety of the pulley block anti-fall structure. The first cover 1 in this application is also provided with a first panel 16, which covers the upper part of the rope wheel 6, protecting the rope wheel 6 and the rope 7 and ensuring their safe use; the second cover 2 is provided with a second panel 17, which covers the upper parts of the driving gear 302 and the driven gear 303, providing protection for both.

[0056] In a preferred embodiment, the first housing 1 in this application has a pressing structure 8 on the side away from the second housing 2; the pressing structure 8 is arranged along the rope end of the rope wheel, and a turning friction block 803 is provided at the top of the pressing structure 8. A roller 804 is provided on the upper part of one side of the turning friction block 803. One end of the rope 7 is set at a high position, and the other end passes through the roller 804, winds along the rope winding space 601 of the rope wheel 6, and moves downward under the action of the worker's own weight after passing through the turning friction block 803; due to the distance between the first housing 1 and the second housing 2 Connected by the pivot 15, and with the pressure structure 8 mounted on the first housing 1, the rope 7 extending from the steering friction block 803 is pressed towards the rope pulley 6 by the worker's own weight. The pressure structure 8 compresses the rope 7, confining it between the rope pulley 6 and the pressure structure 8, ensuring the safety of the pulley system for lifting the worker via the rope pulley and preventing the rope 7 from slipping off the rope pulley 6. The steering friction block 803 increases the friction on the rope 7, ensuring that the pulley system rises at a uniform speed along the rope 7.

[0057] More preferably, the pressing structure 8 includes multiple pressing shafts 801 and pressing sleeves 802 disposed on corresponding pressing shafts 801. The pressing shafts 801 are arranged circumferentially along the end of the rope 7 of the rope pulley 6. The rope 7 extending from the steering friction block 803 is pressed towards the rope pulley 6 by the worker's own weight. The multiple pressing sleeves 802 abut against the rope in the use state and move away from the rope in the unlocked state. Each pressing shaft 801 in this application is provided with a pressing sleeve 802. The pressing sleeve 802 rotates along the corresponding pressing shaft 801. The setting of the pressing sleeve 802, in the process of realizing the pressing and limiting of the rope, utilizes the rotation of the pressing sleeve 802 along the pressing shaft 801 to realize the transmission of the rope. The multiple pressing sleeves 802 abut against the rope in the use state and move away from the rope in the unlocked state.

[0058] In a preferred embodiment, the second housing 2 is provided with a rope unlocking part 9 on the side facing the first housing 1. The rope unlocking part 9 includes a cam 901, a cam connecting shaft 902, and a cam follower shaft 903. The cam connecting shaft 902 passes through both sides of the second housing 2, and a cam 901 is provided on the second housing side facing the first housing 1 via the cam connecting shaft 902. One end of the cam follower shaft 903 is provided on one side of the cam 901. The cam follower shaft 903 moves under the action of the cam 901. A handle 10 is provided on the cam connecting shaft 902 on the other side of the second housing, and a torsion spring 1001 is provided inside the handle 10. The other end of the cam follower shaft 903 is provided on the first housing 1.

[0059] When it is necessary to install or remove the rope from the rope wheel 6 for replacement, the rope unlocking part must be opened to complete the installation or removal of the rope 7. Specifically, rotating the handle 10 causes the cam 901 to rotate, which is connected to the cam connecting shaft 902. The cam 901 is mounted on the second cover 2 via the cam connecting shaft 902. The rotation of the handle 10 drives the cam connecting shaft 902 to rotate, which in turn drives the cam 901 to rotate. During the rotation of the cam 901, the cam follower shaft 903 is continuously squeezed, causing the cam follower shaft 903 to move to the right. Since the other end of the cam follower shaft 903 is mounted on the first cover 1, and the first cover 1 and the second cover 2 are connected by a rotating shaft 15, the cam follower shaft 903 moves to the right, causing the first cover 1 to rotate along the rotating shaft 3. Since the pressure structure 8 is mounted on the first cover 1, the pressure structure 8 moves to the right, increasing the distance between the pressure structure 8 and the rope wheel 6, making it easier to install or remove the rope 7.

[0060] Once the rope is installed, the handle 10 contains a torsion spring 1001. Releasing the handle 10 causes the cam 901 to reset under the action of the torsion spring 1001, preparing for the next opening of the rope unlocking part. When using the pulley system after the rope is installed, the rope 7 winds counterclockwise along the rope wheel 6, passes through the top of the pressure structure 8, and moves downward, causing the pulley system to rise. This allows the pulley system to lift the worker upward. As the rope 7 moves downward through the top of the pressure structure 8, it is compressed by the worker's own weight, pressing the pressure structure 8 downward and towards the rope wheel 4, ultimately resetting the pressure structure 5.

[0061] The second cover 2 is also provided with a cam track groove 904 and a follower shaft track groove 905 on the side facing the first cover 1. The cam 901 is located in the cam track groove 904, and the cam 901 moves along the cam track groove 904 under the action of the cam connecting shaft 902. The cam track groove 904 is arc-shaped.

[0062] The cam follower shaft 903 is located in the follower shaft track groove 905, and the cam follower shaft 905 moves along the follower shaft track groove 905 under the action of the cam 901.

[0063] In this application, the arc-shaped cam track groove 12 provides a limiting space for the rotation of the cam 901, ensuring that the cam 901 rotates within the cam track groove 904, thus ensuring the safety and stability of the cam 901's rotation. By rotating the cam 901, the cam 901 presses against the cam follower shaft 903, transforming the circumferential rotation of the cam 901 into a rightward movement of the cam follower shaft 903. Since the other end of the cam follower shaft 903 is located on the first cover 1, the cam follower shaft 903 drives the first cover 1 to move. Since the first cover 1 is provided with a pressing structure 8, and the first cover 1 and the second cover 2 are connected by a rotating shaft 15, when the cam 901 presses against the cam follower shaft 903, the first cover 1 ultimately drives the pressing structure 8 to rotate along the rotating shaft 3, increasing the distance between the pressing structure 8 and the rope wheel 6, making it easier to remove the rope 7 from the rope wheel 6 or install the rope 7 on the rope wheel 6.

[0064] The second cover 2 is provided with a rotating swing shaft 201 on the side facing the first cover, and the first cover 2 is provided with an arc groove 101, and the rotating swing shaft 201 moves along the arc groove 101.

[0065] As the first cover 1 moves the pressure structure 8 to the right, the rotating swing shaft 201 on the second cover 2 moves to the left along the arc groove 101, ensuring the stability of the rotation of the first cover 1 along the second cover 2. At the same time, the limiting of the rotating swing shaft 201 by the arc groove 101 ensures the rotation angle of the first cover 1, improving the stability and safety of the rotation between the first cover 1 and the second cover 2.

[0066] The multi-functional pulley assembly in this application also includes a second anti-fall mechanism, which includes an anti-fall shaft 11 and an anti-fall cover 12. One end of the driven gear shaft 304 extending out of the second cover 2 is disposed inside the anti-fall cover 12, and one end of the driven gear shaft 304 located inside the anti-fall cover 12 is provided with a mounting hole. The anti-fall shaft 11 is disposed in the mounting hole, and the anti-fall shaft 11 extends out of the mounting hole and protrudes from the driven gear shaft 304.

[0067] The fall arrestor cover 12 is provided with an eccentric groove 13, and the eccentric groove 13 is provided with a fall arrest groove 14 protruding out of the outer contour of the fall arrestor cover. The two points connected by the eccentric groove 13 and the fall arrest groove 14 are the travel start point a and the travel end point b, respectively. When the fall arrestor shaft 11 rotates counterclockwise, the fall arrestor shaft 11 passes through the travel start point a and the travel end point b in sequence. The distance between the travel start point a of the fall arrest groove 504 and the outer contour of the fall arrestor cover is greater than the distance between the travel end point b of the fall arrest groove and the outer contour of the fall arrestor cover.

[0068] The eccentric groove 13 includes a first eccentric groove 1301 and a second eccentric groove 1302 connected to each other. The first travel start point A of the first eccentric groove 1301 is connected to the second travel end point D of the second eccentric groove 1302 through a first fall stop groove 1401. The first travel end point B of the first eccentric groove 1301 is connected to the second travel start point C of the second eccentric groove 1302 through the second fall stop groove 1402.

[0069] Furthermore, the second stroke end point D of the second eccentric groove 1302 is positioned close to the outer contour of the fall arrest cover 14 relative to the first stroke start point of the first eccentric groove 1301, and the first stroke end point B of the first eccentric groove 1301 is positioned close to the outer contour of the fall arrest cover 14 relative to the second stroke start point C of the second eccentric groove 1302.

[0070] The anti-fall shaft 11 moves counterclockwise along the driven gear shaft 304 along the trajectory of the first stroke start point A, the second stroke end point D, the second eccentric groove 1302, the second stroke start point C, the first stroke end point B, the first eccentric groove 1301, and the first stroke start point A, and moves back and forth along this trajectory.

[0071] The trajectory of the fall arresting shaft 11 following the clockwise movement of the driven gear shaft 304 is either the first stroke start point A, the first eccentric groove 1301, the first stroke end point B, and the second fall arresting groove 1402, or the second stroke start point C, the second eccentric groove 1302, the second stroke end point D, and the first fall arresting groove 1401.

[0072] During the use of the pulley block, when the driving gear 302 rotates clockwise, driving the driven gear 303 to rotate counterclockwise, the driven gear shaft 304 drives the fall arrest shaft 11 in its mounting hole to rotate counterclockwise. At this time, the fall arrest shaft 11 moves back and forth along the trajectory from the first stroke start point A, the second stroke end point D, the second eccentric groove 1302, the second stroke start point C, the first stroke end point B, the first eccentric groove 1001, and the first stroke start point A. This causes the driven gear shaft 304 to drive the fall arrest shaft 8 to rotate counterclockwise stably in the second eccentric groove 1302 and the first eccentric groove 1301. Since the driven gear shaft 304 drives the rope wheel 6 to realize the counterclockwise transmission of the rope 7, the high-altitude workers can be raised to the designated height to carry out high-altitude operations.

[0073] If the drive gear 302 or the first fall arrestor structure is damaged, the rope can be stopped by the second fall arrestor mechanism. Specifically, when the driven gear 303 rotates clockwise, the driven gear shaft 304 drives the fall arrestor shaft 11 in its mounting hole to move half a turn along the first stroke start point A, the first eccentric groove 1301, and the first stroke end point B. Since the first stroke end point B of the first eccentric groove 1301 is close to the outer contour of the fall arrestor cover 12 relative to the second stroke start point C of the second eccentric groove 1302, the fall arrestor shaft 11 gradually slides into the second fall arrestor groove 1402 under the action of centrifugal force. The second fall arrestor groove 1402 limits the fall arrestor shaft 11, and the driven gear shaft 304 cannot continue to rotate clockwise. This prevents the driven gear shaft 304 from driving the rope wheel 6 to rotate clockwise, and prevents the rope on the rope wheel from loosening in the opposite direction. This effectively prevents the rapid descent of the pulley block caused by the rapid loosening of the rope, which could pose a safety hazard to workers at height. In the event of a fall, the pulley system can quickly prevent a fall. Similarly, when the driven gear shaft 304 rotates clockwise, it also drives the fall arrest shaft 11 in the mounting hole to move half a turn along the second stroke start point C, the second eccentric groove 1302, and the second stroke end point D. Since the second stroke end point D of the second eccentric groove 1402 is close to the outer contour of the fall arrest cover 12 relative to the first stroke start point A of the first eccentric groove 1301, the fall arrest shaft 11 gradually slides into the first fall arrest groove 1401 under the action of centrifugal force. The first fall arrest groove 1401 limits the fall arrest shaft 11, and the driven gear shaft 304 cannot continue to rotate. This effectively prevents the driven gear shaft 304 from rotating clockwise, thereby preventing the rope from loosening quickly due to the clockwise rotation of the rope wheel. It also prevents the pulley system from falling rapidly due to damage to the driving gear 302 or the first fall arrest structure, thus achieving the fall arrest function of the pulley system and greatly increasing the safety protection performance of the pulley system.

[0074] 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.

[0075] 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 multifunctional pulley system, characterized in that, It includes a first housing (1), a second housing (2), a power transmission mechanism (3), a first anti-fall mechanism (4), and a universal joint (5); The first cover (1) and the second cover (2) are connected by a rotating shaft (15). The bottom end of the first cover (1) is provided with a universal ring (5). The second cover (2) is provided with a power transmission mechanism (3) on the side away from the first cover (1). The power transmission mechanism (3) includes a driving gear (302), a driven gear (303) and a driven gear shaft (304). The driving gear (302) is connected to the power input mechanism. A driven gear shaft (304) is provided on one side of the driving gear (302). A driven gear (303) is provided on the driven gear shaft (304). The driven gear (303) meshes with the driving gear (302). The driven gear shaft (304) passes through the first cover (1) and is connected to the rope wheel (6). A rope winding space (601) is provided on the circumference of the rope wheel (6). A rope (7) is wound in the rope winding space (601). The first anti-fall mechanism (4) is located at the lower part of the driven gear (303). The first anti-fall mechanism (4) includes a compression spring (401) and a one-way tooth (402). One end of the one-way tooth (402) is a rotating end (4021) and the other end is a free end (4022). The rotating end (4021) is mounted on the second cover (2) through a rotating shaft. A compression spring (401) is provided between the free end (4022) of the one-way tooth (402) and the inner wall of the second cover (2). The teeth on the one-way tooth (402) are located at the free end (4022), and the teeth face the driven gear and mesh with the driven gear (302). When the driven gear (303) rotates counterclockwise, the free end (4022) of the one-way tooth (402) is driven counterclockwise by the driven gear (303) to push the pressure spring (401) upward, so that the free end (4022) of the one-way tooth (402) rotates along the rotating end (4021), and the driven gear (303) can rotate normally counterclockwise; When the driven gear (303) rotates clockwise, the teeth of the one-way gear (402) mesh with the driven gear (303), and the driven gear (303) cannot rotate clockwise.

2. The multifunctional pulley block according to claim 1, characterized in that, The second cover (2) is provided with a rope unlocking part (9) on the side facing the first cover (1). The rope unlocking part (9) includes a cam (901), a cam connecting shaft (902) and a cam follower shaft (903). The cam connecting shaft (902) passes through both sides of the second cover (2), and a cam (901) is provided on the side of the second cover facing the first cover (1) through the cam connecting shaft (902). One end of the cam follower shaft (903) is provided on one side of the cam (901). The cam follower shaft (903) moves under the action of the cam (901). A handle (10) is provided on the cam connecting shaft on the other side of the second cover. A torsion spring (1001) is provided inside the handle (10). The other end of the cam follower shaft (903) is provided on the first cover (1).

3. The multifunctional pulley block according to claim 2, characterized in that, The second cover (2) is also provided with a cam track groove (904) and a follower shaft track groove (905) on the side facing the first cover (1). The cam (901) is located in the cam track groove (904), and the cam (901) moves along the cam track groove (904) under the action of the cam connecting shaft (902). The cam track groove (904) is arc-shaped. The cam follower shaft (903) is located in the follower shaft track groove (905), and the cam follower shaft (905) moves along the follower shaft track groove (905) under the action of the cam (901).

4. The multifunctional pulley block according to claim 2, characterized in that, The second cover (2) has a rotating swing shaft (201) on the side facing the first cover, and the first cover (1) has an arc groove (101) and the rotating swing shaft (201) moves along the arc groove (101).

5. The multifunctional pulley block according to claim 1, characterized in that, The first cover (1) is provided with a pressing structure (8) on the side away from the second cover (2); the pressing structure (8) is provided along the end of the rope from the rope wheel, and the top of the pressing structure (8) is provided with a turning friction block (803). After one end of the rope (7) is wound along the rope winding space (601) of the rope wheel (6), it passes through the turning friction block (803) and moves downward under the action of the worker's own weight; and the rope (7) extending from the turning friction block (803) squeezes the pressing structure (8) towards the rope wheel (6) under the action of the worker's own weight.

6. The multifunctional pulley block according to claim 5, characterized in that, The pressing structure (8) includes multiple pressing shafts (801) and pressing sleeves (802) set on the corresponding pressing shafts (801). The pressing shafts (801) are arranged around the circumference of the rope (7) end of the rope wheel (6). The rope (7) extending from the steering friction block (803) is pressed towards the rope wheel (6) by the worker's own weight. The multiple pressing sleeves (802) abut against the rope in the use state and move away from the rope in the unlocked state.

7. The multifunctional pulley block according to claim 1, characterized in that, It also includes a second fall protection mechanism, which includes a fall protection shaft (11) and a fall protection cover (12). One end of the driven gear shaft (304) extending out of the second cover (2) is located inside the fall protection cover (12), and one end of the driven gear shaft (304) located inside the fall protection cover (12) is provided with a mounting hole. The fall protection shaft (11) is provided in the mounting hole, and the fall protection shaft (11) extends out of the mounting hole and protrudes from the driven gear shaft (304). The fall arrestor cover (12) is provided with an eccentric groove (13), and the eccentric groove (13) is provided with a fall arrest groove (14) protruding out of the outer contour of the fall arrestor cover. The two points connected by the eccentric groove (13) and the fall arrest groove (14) are the start point (a) and the end point (b) of the stroke, respectively. When the fall arrestor shaft (11) rotates counterclockwise, the fall arrestor shaft (11) passes through the start point (a) and the end point (b) of the stroke in sequence. The distance between the start point (a) of the fall arrest groove (504) and the outer contour of the fall arrestor cover is greater than the distance between the end point (b) of the fall arrest groove and the outer contour of the fall arrestor cover.

8. The multifunctional pulley block according to claim 1, characterized in that, The eccentric groove (13) includes a first eccentric groove (1301) and a second eccentric groove (1302) connected to each other. The first stroke start point (A) of the first eccentric groove (1301) is connected to the second stroke end point (D) of the second eccentric groove (1302) through the first fall stop groove (1401). The first stroke end point (B) of the first eccentric groove (1301) is connected to the second stroke start point (C) of the second eccentric groove (1302) through the second fall stop groove (1402). Furthermore, the second stroke end point (D) of the second eccentric groove (1302) is located close to the outer contour of the stop cover (14) relative to the first stroke start point of the first eccentric groove (1301), and the first stroke end point (B) of the first eccentric groove is located close to the outer contour of the stop cover (14) relative to the second stroke start point (C) of the second eccentric groove (1302). The anti-fall shaft (11) moves counterclockwise along the driven gear shaft (304) in the following trajectory: first stroke start point (A), second stroke end point (D), second eccentric groove (1302), second stroke start point (C), first stroke end point (B), first eccentric groove (1301), first stroke start point (A), and repeats along this trajectory. The trajectory of the fall arrest shaft (11) moving clockwise with the driven gear shaft (304) is either the first stroke start point (A), the first eccentric groove (1301), the first stroke end point (B), and the second fall arrest groove (1402), or the second stroke start point (C), the second eccentric groove (1302), the second stroke end point (D), and the first fall arrest groove (1401).

9. The multifunctional pulley block according to claim 1, characterized in that, The power transmission mechanism (3) also includes an input shaft (301), one end of which is connected to a power input mechanism, and the other end of which is connected to one end of a drive gear (302), and the other end of the drive gear (302) is fitted with a gear sleeve (305).

10. The multifunctional pulley block according to any one of claims 1-9, characterized in that, The first cover (1) is also provided with a first panel (16), which covers the upper part of the rope wheel (6), and the second cover (2) is provided with a second panel (17), which covers the upper part of the driving gear (302) and the driven gear (303).

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