Portable sprocket elevator

Abstract

The utility model relates to the field of aerial work, especially in a portable sprocket elevator that can work on the fixed track to improve the work efficiency and safety performance of lifting operation, a portable sprocket elevator, including support fixed plate, and first set of limit mechanism, at least one sprocket, drive integration and limit integration are assembled on support fixed plate respectively, drive integration drives sprocket along track travels, still include second set of limit mechanism on limit integration, two sets of limit mechanism are clamped in the both sides of track respectively, and the interval between two sets of limit mechanism can change to facilitate the loading and unloading, improve work efficiency. Further limit integration still includes handle limit lock and vertical roof beam limit lock, double locking working condition, improve the safety of lifting operation.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude operations, and in particular to a portable sprocket lift that can operate on a fixed track. Background Technology

[0002] Currently, the main types of lifting devices suitable for fixed tracks include elevators and non-climbing devices. These two types are commonly used inside wind turbine towers. Elevators utilize a rack and pinion drive system, while non-climbing devices require a hoist to drive a wire rope towing structure. These structures require space, equipment, and construction costs, and maintenance costs are also significant. Especially in harsh environments such as hydropower, offshore wind power, deep wells, or other wind power projects, installing a separate system for each power generation system would result in extremely high equipment and construction costs. Furthermore, the harsh environments in these applications make the equipment susceptible to corrosion, further increasing maintenance costs.

[0003] Currently, there are no portable lifts on the market that use fixed tracks and are suitable for these or similar scenarios. Utility Model Content

[0004] This utility model provides a portable sprocket lifter for use in workplaces equipped with fixed tracks, in order to improve the efficiency and safety of lifting operations.

[0005] This utility model provides a portable sprocket lifter, including a support plate, and a first set of limiting mechanisms, at least one sprocket, a drive assembly, and a limiting assembly respectively mounted on the support plate. The first set of limiting mechanisms includes at least two limiting members for engaging with one side of the track of the portable sprocket lifter. The drive assembly drives the sprocket to travel along the track. The limiting assembly includes a second set of limiting mechanisms, an operating handle, a rotary shaft, a lever, a compression spring limiting cylinder, a compression spring, a vertical beam, a linear bearing, a vertical beam guide rail, a handle fixing shaft, a positioning body, and a lever. The second set of limiting mechanisms is mounted on the vertical beam and includes at least two limiting members for engaging with the other side of the track.

[0006] The vertical beam is assembled on the support plate via the linear bearing and the vertical beam guide rail; one end of the handle fixing shaft is fixedly connected to the operating handle, and the other end is fixedly connected to the toggle lever; the positioning body and the toggle body are respectively fixed at both ends of the toggle lever and located on both sides of the vertical beam; one end of the rotary shaft is fixed on the support plate, one end of the compression spring limiting cylinder is fitted on the rotary shaft, and the other end is fixedly connected to the handle fixing shaft; the compression spring is assembled in the compression spring limiting cylinder.

[0007] When the operating handle is in the first position, the positioning body is locked on one side of the vertical beam. Rotating the operating handle causes the handle fixing shaft and the actuating rod to rotate around the rotation axis, causing the positioning body to leave the vertical beam and the actuating body to move the vertical beam from the other side. The vertical beam slides along the vertical beam guide rail under the constraint of the linear bearing. The second set of limiting mechanisms moves in a direction away from the first set of limiting mechanisms, and the distance between the first set of limiting mechanisms and the second set of limiting mechanisms increases accordingly.

[0008] In one specific embodiment, the positioning body includes a positioning bearing, the actuating body includes an actuating bearing, the positioning bearing is installed at the other end of the handle fixing shaft or at one end of the actuating rod, the actuating bearing is installed at the other end of the actuating rod, and a positioning groove for locking the positioning body is provided on one side of the vertical beam.

[0009] In another specific embodiment, the limiting integration further includes: a compression spring sliding rod, wherein a rod limiting groove is provided on the compression spring limiting cylinder, wherein one end of the compression spring sliding rod is fixed on the handle fixing shaft; a rod limiting pin passes through the rod limiting groove and the hole of the compression spring sliding rod, and the compression spring and the compression spring limiting cylinder are installed on the compression spring sliding rod.

[0010] In one specific embodiment, the vertical beam is assembled on the support fixing plate via the linear bearing and the vertical beam guide rail. Specifically, the linear bearing includes two linear bearings, and the vertical beam guide rail includes two cylindrical pin guide rails. Each linear bearing is fixed on the vertical beam 27, and the guide hole of each linear bearing is assembled into the corresponding cylindrical pin guide rail. The cylindrical pin guide rail is fixed on the support fixing plate.

[0011] Furthermore, in the above embodiments, the portable sprocket lifter further includes at least one third set of limiting mechanisms supported between the support fixing plate and the track, the third set of limiting mechanisms being fixed to the support fixing plate.

[0012] Preferably, each of the third set of limiting mechanisms includes two Y-direction limiting bearings, a disc spring, a column located between the two Y-direction limiting bearings, two spacers located on both sides of one end of the column, and a plug screw passing through the two Y-direction limiting bearings, one end of the column, and the two spacers, a screw nut for locking the plug screw, the disc spring being fitted onto the other end of the column, and the other end of the column 141 being fixed to the support fixing plate.

[0013] The portable sprocket lifter provided by this utility model includes at least one section of guide rail, which includes a linear guide rail and an arc-shaped guide rail. Each section of the guide rail has at least one mounting groove along its length. Each mounting groove is equipped with at least one row of roller chains. Each row of roller chains includes a group of rollers arranged in parallel. Each roller is threaded onto a pin, and each pin is fixed in the mounting groove. There is a set distance between every two adjacent rollers, which is set according to the parameters of the sprocket. Each section of the guide rail also has a limiting boss on both sides along its length. Each limiting boss is parallel to the mounting groove along its length. The first set of limiting mechanisms and the second set of limiting mechanisms are respectively engaged on one of the limiting bosses. Each section of the guide rail also has a safety groove along its length for assembling a detachable internal locking track anti-fall buckle. The bottom of the safety groove has anti-fall buckle slots spaced along its length.

[0014] Further in the above embodiments, the limiting integration also includes a handle limiting lock, a locking spring, and a lock seat. The operating handle is provided with a handle locking hole, the top of the handle limiting lock is provided with a ramp, the lock seat is installed on the vertical beam, and the handle limiting lock and the locking spring are fitted together and installed in the hole of the lock seat. When the operating handle moves back to the first position, the handle locking hole slides across the ramp, and the handle limiting lock springs into the handle locking hole, thereby locking the operating handle in the first position.

[0015] Further in the above embodiments, the limiting integration also includes two vertical beam limiting locks that lock the vertical beam to the support plate at the first position. Each vertical beam limiting lock is assembled on the support fixing plate, and each vertical beam limiting lock includes a locking tongue fitted with a locking tongue spring. The vertical beam is provided with a sliding groove corresponding to the locking tongue. In the direction in which the vertical beam slides along the vertical beam guide rail, the sliding groove provides redundant space for the vertical beam to continue moving a set distance after being locked.

[0016] The portable sprocket lifter provided by this utility model includes two sets of limiting mechanisms. These two sets of limiting mechanisms are respectively engaged on both sides of the track, positioning the sprocket onto the roller chain. Driven by the drive mechanism, the sprocket moves along the track. The first set of limiting mechanisms is fixed to the support plate, while the second set of limiting mechanisms is located within a limiting assembly. The limiting assembly is movably assembled on the support plate via linear bearings and cylindrical pin guide rails, allowing it to reciprocate laterally relative to the support plate, enabling the second set of limiting mechanisms to move back and forth between the release position and the working position. When the second set of limiting mechanisms is in the release position, the distance between the two sets of limiting mechanisms is at its maximum, making it very convenient to engage or disengage the portable sprocket lifter from the track. When the second set of limiting mechanisms is in the working position, the two sets of limiting mechanisms clamp the portable sprocket lifter onto the limiting bosses of the track. The limiting bosses can restrict the direction of the limiting bearings on both sides and above the track, i.e., from the positive and negative X-directions and the positive Y-direction. Furthermore, the portable sprocket lifter provided by this utility model may also include a third set of limiting mechanisms, namely a Y-axis limiting mechanism located between the support plate and the track, providing stable support from the bottom of the portable sprocket lifter, i.e., limiting from the negative Y direction. Using these three sets of limiting mechanisms, the direction of the portable sprocket lifter, i.e., the direction of the sprocket, is stably limited to along the track direction. To further ensure safe and reliable operation, a handle limiting lock and a vertical beam limiting lock are also provided in the limiting integration, providing a double locking working state. Attached Figure Description

[0017] Figure 1 A front view of a portable sprocket lifter provided in an embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the rear structure of the portable sprocket lifter provided in this embodiment of the utility model;

[0019] Figure 3 A sectional view of the structure of the control handle 21 for assembly and disassembly;

[0020] Figure 4 This is a sectional view of the vertical beam and handle limit lock section.

[0021] Figure 5 This is a structural sectional view of the Y-axis limiting component.

[0022] Figure 6 A sectional view of the vertical beam limit lock and cylindrical pin guide rail section;

[0023] Figure 7 Exploded view of the control handle portion integrated with the limit switch;

[0024] Figure 8This is an exploded view of the Y-axis limit bearing and sprocket section.

[0025] Figure 9 A schematic diagram of the structure of the second set of limiting mechanisms of a portable sprocket lifter being operated to the release position, provided for an embodiment of this utility model;

[0026] Figure 10 A schematic diagram of the first and second limiting mechanisms of a portable sprocket lifter being engaged in the working position, provided for an embodiment of this utility model;

[0027] Figure 11 A schematic diagram of the structure of the X-axis limit bearing of the portable sprocket lifter in the release position and in cooperation with the guide rail, i.e., the initial installation position;

[0028] Figure 12 This is a schematic diagram showing the X-axis limit bearing of the portable sprocket lifter in its working position, engaging with the guide rail, i.e., the structure after installation.

[0029] Figure 13 This is a schematic diagram of the structure of the H-shaped guide wheel in the working position cooperating with the guide rail of the open chain structure in another embodiment of the portable sprocket lift.

[0030] Figure 14 This is an exploded view of the handle limit lock section.

[0031] Figure 15 A schematic diagram of a curved track structure used in a portable sprocket lifter.

[0032] Figure 16 This is a schematic diagram of the guide rail structure without the roller chain installed.

[0033] Figure label:

[0034] 11. Support plate; 12. Vertical beam limit lock; 121. Locking ring; 122. Locking tongue; 13. Load lifting ring; 14. Y-direction limit assembly; 141. Column; 142. Disc spring; 143. Column lock nut; 144. Y-direction limit bearing; 145. Screw lock nut; 146. Spacer; 147. Plug screw; 15. Sprocket side X-direction limit bearing; 151. Sprocket side X-direction limit H-type guide wheel.

[0035] 20. Limiting unit; 21. Operating handle; 211. Handle retaining pin; 212. Handle locking hole; 22. Handle limit lock; 221. Lock seat; 222. Locking spring; 223. Locking limit pin; 23. Rotary shaft; 24. Handle side X-direction limit bearing; 241. Handle side X-direction limit H-type guide wheel; 25. Actuating lever; 251. Actuating shaft; 252. Actuating bearing; 253. Bearing retainer ring; 254. Actuating lever retaining pin; 26. 261. Compression spring limiting cylinder; 262. Limiting cylinder fixing pin; 263. Rod limiting groove; 27. Vertical beam; 271. Linear bearing; 272. Cylindrical pin guide rail; 273. Cylindrical pin limiting pin; 274. Sliding groove; 275. Inner retaining ring; 276. Positioning groove; 28. Outer cover; 29. ​​Handle fixing shaft; 291. Positioning bearing; 292. Bearing retaining ring; 293. Compression spring sliding rod; 294. Rod limiting pin; 295. Retaining ring.

[0036] 30. Drive integration; 31. Upper limit trigger lever; 32. Lifter dial switch; 33. Power switch; 34. Lithium battery; 35. Manual lowering plug; 36. Sprocket; 37. Sprocket fixing shaft; 38. Flat key; 39. Sprocket limit pin.

[0037] 40. Track; 401. Assembly groove; 402. Roller; 403. Mounting hole; 404. Limiting boss; 405. Anti-fall buckle groove; 406. Safety slide. Detailed Implementation

[0038] This utility model provides a portable sprocket lift, which uses a sprocket as its traveling mechanism to move on a fixed track with an open, non-closed-loop structure at both ends. The open fixed track is installed in various work sites, such as in harsh environments like hydropower, offshore wind power, deep wells, or other wind power projects. Workers can carry the portable sprocket lift to these work sites. This significantly reduces the complexity of the lifting system in these work sites, lowers the installation and maintenance costs of the lifting system, and is particularly suitable for long-distance operations.

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0040] like Figure 1 , Figure 2 and Figure 8 As shown, where, Figure 1 This is a front view of a portable sprocket lifter provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the rear structure of the portable sprocket lifter provided in an embodiment of the present invention. Figure 8 This is an exploded view of the Y-direction limiting bearing and sprocket assembly. The front of the lifting device is the side facing the operator. This embodiment of the utility model provides a portable sprocket lifting device, mainly comprising an outer cover 28, at least one sprocket 36, an X-direction limiting mechanism for mounting the portable sprocket lifting device to both sides of a track, and a drive assembly 30 for driving the sprocket along the track. The X-direction limiting mechanism can be mounted from both sides of the track under a limiting boss extending along the track length, providing limiting in both the X and Y directions. The X and Y directions are as follows... Figure 11 and Figure 12 As shown, the X-direction refers to the direction perpendicular to both sides of the track, while the Y-direction refers to the direction perpendicular to the X-direction. The portable sprocket lifter can further include a Y-direction limiting mechanism that limits the portable sprocket lifter in the negative Y-direction. This Y-direction limiting mechanism provides support and stability at the bottom of the portable sprocket lifter. For example, the two-sided X-direction limiting mechanisms... Figure 2 The two sprocket-side X-axis limiting bearings 15 and the two handle-side X-axis limiting bearings 24 are shown. The Y-axis limiting mechanism is, for example... Figure 4 Two Y-axis limiting components 14, each containing two Y-axis limiting bearings 144, provide good support for the portable sprocket lifter facing the back of the track. Using these bearings, the sprocket 36 is secured above the track and remains stable. The bearings can also be replaced with H-type guide wheels or sliders. The drive unit 30 typically includes a micro motor and may further include a gearbox and other supporting components. The sprocket 36 is directly mounted to the shaft of the micro motor or mounted via the gearbox. The operator uses a power switch 33 to control the power supply line between the drive unit 30 and the lithium battery 34. When the lithium battery 34 is connected, the lifter's toggle switch 32 controls the micro motor to rotate, driving the sprocket along the track and, via the load lifting ring 13, moving the operator or materials along with it. The limit switch 20 is a key component of the portable sprocket lifter. The limit switch 20 is used to lock the portable lifter onto the track before use and to remove it from the track after use. Furthermore, the locking state is locked during use to ensure that the portable lifter is safe, reliable and does not fall off.

[0041] To facilitate understanding, let's first introduce the track used in the portable sprocket lift provided by this utility model. The traveling mechanism of the portable sprocket lift uses a sprocket, and a roller chain is correspondingly mounted on the track. For example... Figure 15 and Figure 16 The diagram shown is a schematic of a track structure, in which... Figure 15 This is a schematic diagram of the curved structure of track 40 equipped with a roller chain. Figure 16 This is a schematic diagram of a guide rail structure without the roller chain installed. Figure 15 As shown, track 40 can be formed by connecting multiple guide rail segments end to end. Each guide rail segment is equipped with at least one row of roller chains. Depending on the actual work site requirements, the guide rails can be designed and manufactured as either linear or curved guide rails. The curvature of the curved guide rails can be designed in various ways according to the required bending degree. In the work site, multiple linear and curved guide rails can be flexibly selected according to the actual conditions of the work path and assembled on-site into a linear or curved track. After multiple linear and curved guide rails are connected end to end, they are fixed to a mounting frame to form a straight track or a track with curved turns, which can change the sprocket rolling of the portable sprocket lifter into linear or curved motion. The portable sprocket lifter is snapped onto the limiting boss 404 of track 40 and rises or falls along the track. Each section of the guide rail has at least one mounting slot 401 along its length. Each mounting slot 401 contains at least one row of roller chains. Each row of roller chains includes a set of rollers 402 arranged side-by-side. Each roller is fixed to the guide rail by a pin, with both ends of the pin secured by mounting holes 403 in the mounting slot. A predetermined spacing is maintained between every two adjacent rollers, determined based on the sprocket parameters. One or more roller chains can be mounted as needed, and they can be mounted on one side of the rail or on both sides. Figure 15 and Figure 16 Roller chains can be fitted to both sides of the track shown. Figure 11 The track shown is equipped with a roller chain on one side. The track structure provided in this embodiment is merely one example and is not intended to limit the scope of protection of this utility model.

[0042] As mentioned earlier, ease of assembly and disassembly, as well as safety and reliability, are crucial for portable lifting devices. The portable sprocket lifting device provided by this utility model utilizes a limiting integrated 20 to conveniently and quickly mount and remove the device from the track. Furthermore, it achieves a locking state after mounting to ensure safe and reliable operation. The portable sprocket lifting device provided by this utility model is described in detail below with reference to the accompanying drawings.

[0043] Further integration Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 The following describes in detail the structural composition and installation / disassembly process of a portable sprocket lifter provided in an embodiment of this utility model. Among them, Figure 3A cross-sectional view of the control handle 21 for assembly and disassembly. Figure 4 This is a sectional view of the vertical beam 27 and the handle limit lock 22. Figure 5 This is a structural cross-sectional view of the Y-direction limiting component 14. Figure 6 This is a sectional view of the vertical beam limiting lock 12 and the cylindrical pin guide rail. Figure 7 This is an exploded view of the operating handle 21. Figure 9 This is a schematic diagram of the structure of a portable sprocket lifter provided in an embodiment of the present invention, showing the second set of limiting mechanisms being operated to the release position. Figure 10 This is a schematic diagram showing the first and second limiting mechanisms of a portable sprocket lifter, as provided in an embodiment of the present invention, being engaged in the working position. Figure 11 This is a schematic diagram showing the X-axis limit bearing of the portable sprocket lifter engaging with the guide rail in the release position, i.e., the initial installation position. Figure 12 This is a schematic diagram showing the X-axis limit bearing of the portable sprocket lifter in its working position, engaging with the guide rail, i.e., the structure after installation. Figure 13 This is a schematic diagram of another embodiment of the portable sprocket lift, showing the H-shaped guide wheel engaging with the guide rail of the open chain structure in the working position.

[0044] The portable sprocket lifter provided in this embodiment of the utility model uses the support plate 11 as the installation reference. The limit integration 20, drive integration 30, two X-direction limit bearings 15 and two Y-direction limit components 14 on the sprocket side, vertical beam limit lock 12 and load lifting ring 13 are all fixedly installed on the support plate 11.

[0045] The main structure and assembly process of the portable sprocket lifter are as follows:

[0046] The operating handle 21 is fixed to one end of the handle fixing shaft 29 by the handle fixing pin 211. The actuating lever 25 is installed on the handle fixing shaft 29 by the actuating lever fixing pin 254. The positioning bearing 291 is installed on the other end of the handle fixing shaft 29 using the bearing retainer 292. The screw part of the actuating shaft 251 is installed into the threaded hole of the actuating lever 25, and the actuating bearing 252 is installed on the actuating shaft 251 using the bearing retainer 253. The retaining ring 295 is installed into the threaded hole of the handle fixing shaft 29 using the screw part of the compression spring sliding rod 293. The compression spring 261 and the compression spring limiting sleeve 26 are installed on the compression spring sliding rod 293 using the rod limiting pin 294. Under the pressure of the compression spring 261, the compression spring sliding rod 293 slides in the hole of the compression spring limiting sleeve 26, while the rod limiting pin 294 slides in the rod limiting groove 263. It should be noted that the positioning bearing can also use other types of positioning elements, such as sliders or pulleys. Similarly, the actuating bearing can also use other types of actuating elements, such as sliders or pulleys. The retaining ring 295 is not a necessary component; its function is to ensure that the contact surface of the compression spring 261 at its end is flat.

[0047] The linear bearing 271 is installed into the linear bearing hole of the vertical beam 27 using the inner retaining ring 275. The cylindrical pin guide rail 272 is fixed to the support plate 11. The guide hole of each linear bearing 271 is assembled into the corresponding cylindrical pin guide rail 272 so that the linear bearing 271 can slide laterally along the cylindrical pin guide rail 272. After applying threadlocker to the threaded part of the lock seat 221, it is installed onto the vertical beam 27. Then, the locking spring 222 and the handle limit lock 22 are installed into the hole of the lock seat 221 in sequence and fixed with the lock limit pin 223. The direction of the handle limit lock 22 is adjusted. It should be noted that the cylindrical pin guide rail is only a specific example of the vertical beam guide rail. Other types of guide rails can also be used as the vertical beam guide rail.

[0048] After applying thread-locking adhesive to the threaded portion of the X-direction limiting bearing on the handle side, install it onto the vertical beam 27. Then, move the vertical beam 27 towards the handle side; it will move left and right along the cylindrical pin guide rail 272. Install the vertical beam limiting lock 12 into the threaded holes at both ends of the support fixing plate. Pull the lock ring 121 to rotate it to the bottom of the groove; the locking tongue 122 will pop out into the sliding groove 274, locking the vertical beam 27 and the support fixing plate 11. After applying thread-locking adhesive to the threaded portion of the rotary shaft 23, install it into the threaded hole of the support fixing plate 11. Use the limiting cylinder fixing pin 262 to install the compression spring limiting cylinder 26 onto the rotary shaft 23. Figure 5As shown, using a screwdriver 147, a Y-axis limiting bearing 144, a spacer 146, a central column 141, another spacer 146, and another Y-axis limiting bearing 144 are sequentially threaded through and locked using a screw lock nut 145. Then, a disc spring 142 is installed at the other end of the column 141. The column 141 is then installed into the mounting hole of the support plate 11 and secured with a column lock nut 143. The tightness of the disc spring 142 can adjust the supporting force between the two Y-axis limiting bearings 144 and the guide rail contact surface, thereby adjusting the tightness between the end faces of the sprocket-side X-axis limiting bearing 15 and the handle-side X-axis limiting bearing 24 and the inner surface of the guide rail 404.

[0049] After applying thread sealant to the threaded portion of the X-direction limiting bearing 15 on the sprocket side, install it into the threaded hole of the support fixing plate 11. Install the flat key 38 onto the sprocket fixing shaft 37, then install the sprocket 36 onto the sprocket fixing shaft 37, and install the sprocket limiting pin 39 into the threaded hole of the sprocket 36.

[0050] The installation process of mounting the portable sprocket lifter onto the track mainly includes the following steps:

[0051] Vertical beam limit locks 12 are provided at both ends of the support fixing plate 11. Each vertical beam limit lock 12 includes a locking ring 121 and a locking tongue 122 installed in the support fixing plate. A sliding groove 274 is located on the vertical beam 27, and the locking tongue 222 extends into the sliding groove 274, locking the vertical beam 27 to the support fixing plate 11. Pulling... Figure 1 The locking ring 121 of the vertical beam limiting lock 12 moves to the upper end of the sliding groove 274 and rotates at a certain angle, generally 90 degrees. The locking tongue 122 exits the sliding groove 274 and locks onto the upper edge of the sliding groove 274, thus unlocking the vertical beam 27. There is one vertical beam limiting lock 12 at each of the upper and lower ends of the supporting fixing plate 11, as shown in the specific locations... Figure 1 and Figure 9 As shown, the length and width of the latch 122 are different. After the latch 122 is pulled out of the limiting sliding groove 274 and rotated at a certain angle, because the length of the latch 122 is greater than the width of the sliding groove 274, the latch 122 can be locked above the limiting sliding groove 274. Figure 7 , Figure 10 and Figure 14 As shown, when the operating handle is in the first position shown in the figure, the handle limit lock 22 is located in the handle lock hole 212, and the positioning bearing 291 is engaged in the positioning groove 276 on one side of the vertical beam 27. At this time, Figure 1The handle limit lock 22 is pressed down to exit the handle lock hole 212, and at the same time, the operating handle 21 is turned clockwise, causing the operating handle 21 and the handle fixing shaft 29 to rotate clockwise around the rotation shaft 23. During the rotation of the operating handle 21, the positioning bearing 291 disengages from the positioning groove 276, and the rod limit pin 294 reaches the limit position of the rod limit groove 263, so that the compression spring sliding rod 293 and the compression spring limit cylinder 26 no longer slide. After the handle fixing shaft 29 rotates to a certain angle, the actuating bearing 252 is engaged with the vertical beam 27. Figure 9 As shown, continuing to rotate the operating handle 21 will cause the actuating bearing 252 to move the vertical beam 27. The linear bearing 271 on the vertical beam 27 will then move to the left along the cylindrical pin guide rail 272 until the vertical beam 27 reaches its limit position. Figure 11 As shown, the operating handle 21 is in the released state at this time, and the two X-direction limit bearings 24 on the handle side are at their maximum released position. The distance between the two sets of X-direction limit bearings is greater than the track width. The two sets of X-direction limit bearings are installed on both sides of the track 40, one on the handle side and one on the sprocket side. The left handle-side X-direction limit bearing is in the released position, with a certain distance from the track 40, while the right sprocket-side X-direction limit bearing is tightly against the track 40 and engaged with the limit boss 404. Figure 9 and Figure 11 As shown. Figure 5 As shown, the portable sprocket lifter can further be equipped with two sets of Y-axis limiting components. For safe and reliable operation, each Y-axis limiting bearing 144 in each Y-axis limiting component 14 must be tightly attached to the plane of the track 40, providing stable support between the guide rail and the support plate 11. At this time, the sprocket 36 is properly engaged with the rollers on the track 40, and the X-axis limiting bearing 15 on the sprocket side is properly engaged with the track 40. The drive assembly is activated, and the sprocket moves along the track 40 under the drive of the drive assembly, converting the sprocket's rolling motion into linear or curvilinear motion.

[0052] Combination Figure 14 The exploded view of the control handle shown is in Figure 11 In this state, when the operating handle 21 is rotated counterclockwise to move back to the first position, the positioning bearing 291 will push the vertical beam 27 to the right. During the rotation, the handle locking hole 212 of the operating handle 21 will press the ramp at the top of the handle limit lock 22, and the handle limit lock 22 will compress the locking spring 222 downwards. The locking limit pin 223 slides in the groove of the lock seat 221. After rotating to the correct position, the handle limit lock 22 springs back into the handle locking hole 212 on the operating handle 21. At the same time, the positioning bearing 291 and the positioning groove 276 of the vertical beam 27 are engaged and re-engaged in the positioning groove 276. At this time, the operating handle 21 is locked in place, the locking tongue 122 locks the vertical beam 27, and the operating handle 21 is in the locked state, locked in the first position. In this state, the tightness of the limit integration 20 and the track 40 can be adjusted by rotating the column lock nut 143. Figure 12 As shown, the two X-direction limit bearings 24 on the handle side are also locked onto the limit boss 404 of the track 40, and the portable sprocket lifter reaches the locked working state.

[0053] The above describes in detail the structure of a portable sprocket lifter provided by this utility model embodiment, in conjunction with the assembly and installation process. The process of removing the portable sprocket lifter from the track 40 is basically the same as the above operation sequence. When the operating handle 21 is in the released state, the portable sprocket lifter can be removed from the track 40, and then... Figure 10 Simply reset the operating handle 21.

[0054] like Figure 6 As shown in the cross-sectional view of the vertical beam limiting lock 12 and the cylindrical pin guide rail, the width of the sliding groove 274 and the locking tongue 122 is smaller than the width of the sliding groove 274. After the locking tongue 122 enters the sliding groove 274, the sliding groove 274 has a certain amount of redundant space. This redundant space allows the portable sprocket lifter to adapt to the curved track. Specifically, when the portable sprocket lifter operates on the curved track, the width of the curved track is greater than the width of the straight track. Therefore, within the allowable range of this redundant space, the curved track will push the handle-side X-direction limiting bearing 24 to move outward under the limitation of the limiting boss 404. The handle-side X-direction limiting bearing 24 will drive the vertical beam 27 to move accordingly. Under the action of the vertical beam limiting compression spring 26, the handle-side X-direction limiting bearing 24 is pushed to fit tightly against the curved track, thereby ensuring that the portable sprocket lifter can reliably lock onto the track when traveling on the curved track.

[0055] As can be seen from the above example, the portable sprocket lifter provided by this utility model includes two sets of limiting bearings. Two sprocket-side X-direction limiting bearings constitute the first limiting mechanism, and two handle-side X-direction limiting bearings constitute the second limiting mechanism. These two limiting mechanisms are respectively engaged on both sides of the track 40, positioning the sprocket 36 above the roller chain. Under the drive of the drive mechanism, the sprocket 36 moves along the track. The first limiting mechanism is fixed to the support plate 11, while the second limiting mechanism is located on the vertical beam 27 in the limiting assembly 20. The vertical beam 27 is movably mounted on the support plate 11 via linear bearings and cylindrical pin guide rails. Under the control of the operating handle 21, the vertical beam 27 can move laterally back and forth relative to the support plate 11, allowing the second limiting mechanism to move back and forth between the release position and the working position. When the second limiting mechanism is in the release position, the distance between the two limiting mechanisms is at its maximum. Figure 11As shown, the distance between the handle-side X-direction limiting bearing 24 and the sprocket-side X-direction limiting bearing 15 is the greatest, making it very convenient to mount or remove the portable sprocket lifter from the rail. When the second set of limiting mechanisms is in the working position, the two sets of limiting mechanisms clamp the portable sprocket lifter onto the rail, i.e. Figure 12 As shown, all four X-axis limiting bearings are secured to the limiting bosses 404 on the track. The limiting bosses 404 can restrict the direction of the limiting bearings from both sides and above the track, i.e., from the positive and negative X-axis directions and the positive Y-axis direction. Furthermore, the portable sprocket lifter provided by this invention can also include at least one third set of limiting mechanisms, i.e., at least one Y-axis limiting component located between the support fixing plate 11 and the track 40. Each Y-axis limiting component can contain two Y-axis limiting bearings. As shown in the figure, when two Y-axis limiting components are assembled, a total of four Y-axis limiting bearings 144 in the two limiting components can provide stable support from the bottom of the portable sprocket lifter, i.e., limiting from the negative Y-axis direction. Using these three sets of limiting mechanisms, the direction of the portable sprocket lifter, i.e., the direction of the sprocket, is stably limited to the track direction. Furthermore, to ensure safe and reliable operation, a handle limiting lock and a vertical beam limiting lock are also provided in the limiting integration, providing a double-locking working state.

[0056] In summary, the portable sprocket lifter provided by this utility model mainly includes: a support fixing plate 11, and a first set of limiting mechanisms, at least one sprocket 36, a drive integration 30, and a limiting integration 20 respectively mounted on the support fixing plate 11. The first set of limiting mechanisms includes at least two limiting parts for locking onto one side of the track. The drive integration 30 drives the sprocket 36 to move along the track. The limiting integration includes a second set of limiting mechanisms, an operating handle 21, a rotating shaft 23, a toggle lever 25, a compression spring limiting cylinder 26, a compression spring 261, a vertical beam 27, a linear bearing, a vertical beam guide rail, a handle fixing shaft 29, a positioning body, and a toggle body. The second set of limiting mechanisms is mounted on the vertical beam 27. This second set of limiting mechanisms includes at least two limiting components for clamping onto the other side of the track. The vertical beam 27 is mounted on the support plate 11 via linear bearings and a vertical beam guide rail. One end of the handle fixing shaft 29 is fixedly connected to the operating handle 21, and the other end is fixedly connected to the actuating rod 25. The positioning body and the actuating body are respectively fixed at both ends of the actuating rod 25 and located on both sides of the vertical beam 27. One end of the rotating shaft 23 is fixed to the support plate 11. One end of the compression spring limiting cylinder 26 is fitted onto the rotating shaft 23, and the other end is fixedly connected to the handle fixing shaft 29. The compression spring 261 is mounted in the compression spring limiting cylinder 26. The limiting body can be a limiting bearing or an H-type guide wheel, for example... Figure 13 As shown, the X-direction limiting bearing 24 on the handle side is replaced by the X-direction H-type guide wheel 241 on the handle side, and the X-direction limiting bearing 15 on the sprocket side is replaced by the X-direction H-type guide wheel 151 on the sprocket side.

[0057] When the operating handle is in the first position, several limit bearings in the X direction are locked on the track, and the positioning body is locked on one side of the vertical beam 27. Rotating the operating handle 21 causes the handle fixing shaft 29 and the actuating rod 25 to rotate around the rotating shaft 23, causing the positioning body to leave the vertical beam 27 and causing the actuating body to move the vertical beam 27 from the other side. The vertical beam 27 slides along the vertical beam guide rail under the constraint of the linear bearing. The second set of limit mechanisms moves in the direction away from the first set of limit mechanisms, and the distance between the first set of limit mechanisms and the second set of limit mechanisms increases accordingly.

[0058] A specific example of a positioning body is a positioning bearing 291, and a specific example of a toggle body is a toggle bearing 252. The positioning bearing 291 is installed at the other end of the handle fixing shaft 29 or at one end of the toggle lever 25, and the toggle bearing 252 is installed at the other end of the toggle lever 25. A positioning groove 276 for locking the positioning body is provided on one side of the vertical beam 27.

[0059] Furthermore, the limiting integration also includes a spring-loaded sliding rod 293. A rod limiting groove 263 is provided on the spring-loaded limiting cylinder 26. One end of the spring-loaded sliding rod 293 is fixed to the handle fixing shaft 29. A rod limiting pin 294 passes through the hole in the rod limiting groove 263 and the spring-loaded sliding rod 293, mounting the compression spring 261 and the spring-loaded limiting cylinder 26 on the spring-loaded sliding rod 293. The compression spring 261 allows the spring-loaded sliding rod 293 to slide within the hole in the spring-loaded limiting cylinder 26, while the rod limiting pin 294 slides within the rod limiting groove 263. The compression spring 261 can apply pressure to the X-direction limiting bearing on the handle side in the direction of the guide rail, causing it to lock onto the rail.

[0060] As shown above, a specific example of the vertical beam 27 being assembled on the support fixing plate 11 via linear bearings and vertical beam guide rails is described. The linear bearings include two, and the vertical beam guide rails include two cylindrical pin guide rails 272. Each linear bearing 271 is fixed to the vertical beam 27 via an inner retaining ring 275. The guide hole of each linear bearing 271 is assembled into the corresponding cylindrical pin guide rail 272, and the cylindrical pin guide rail 272 is fixed on the support fixing plate 11.

[0061] Furthermore, the portable sprocket lifter also includes at least one third set of limiting mechanisms supported between the support plate 11 and the track 40, the third set of limiting mechanisms being fixed to the support plate 11. A specific example is the Y-axis limiting assembly described above, each Y-axis limiting assembly including two Y-axis limiting bearings 144, a disc spring 142, a column 141 located between the two Y-axis limiting bearings 144, two spacers 146 located on either side of one end of the column 141, and a locking screw 147 penetrating the two Y-axis limiting bearings 144, one end of the column 141, and the two spacers 146; a screw nut 145 for locking the locking screw 147; the disc spring 142 being fitted onto the other end of the column 141; and the other end of the column 141 being fixed to the support plate 11.

[0062] To further ensure reliable and safe operation, the portable sprocket lifter provided by this utility model includes a handle limit lock 22, a locking spring 222, and a lock seat 221. The operating handle 21 has a handle lock hole 212, and the top of the handle limit lock 22 has a ramp. The lock seat 221 is mounted on the vertical beam 27. The handle limit lock 22 and the locking spring 222 are fitted together and installed in the hole of the lock seat 221. When the operating handle 21 moves back to the first position, the handle lock hole 212 slides across the ramp, and the handle limit lock 22 springs into the handle lock hole 212, thus locking the operating handle 21 in the first position. During the operation of the portable sprocket lifter, the handle limit lock can lock the operating handle to prevent accidental operation.

[0063] The portable sprocket lifter provided in this embodiment of the utility model may further include two vertical beam limit locks 12. In the first position, the vertical beam 27 is locked to the support plate 11. The vertical beam limit locks 12 are mounted on the support plate 11. Each vertical beam limit lock 12 includes a locking tongue 122 fitted with a locking tongue spring 123. The vertical beam 27 is provided with a sliding groove 274 corresponding to the locking tongue 122. During the operation of the portable lifter, the locking tongues 122 of the upper and lower vertical beam limit locks 12 respectively enter the sliding grooves 274, locking the vertical beam 27 to the support plate 11 from both ends. The two vertical beam limit locks 12 and the handle limit lock together lock the working state of the limit integration, limiting the distance between the first and second limit mechanisms, ensuring the working state of the portable sprocket lifter and preventing sprocket tooth disengagement.

[0064] The portable sprocket lifter provided by this utility model uses a track 40 including at least one section of guide rail, which may include a linear guide rail and an arc-shaped guide rail. Each section of guide rail is provided with at least one mounting groove 401 along its length. Each mounting groove 401 is equipped with at least one row of roller chains. Each row of roller chains includes a set of rollers 402 arranged in parallel. Each roller 402 is mounted on a pin. Both ends of each pin pass through mounting holes 403 on the groove wall of the mounting groove and are fixed. There is a set spacing between each two adjacent rollers. The set spacing is set according to the parameters of the sprocket teeth. Each section of guide rail is also provided with limiting bosses 404 along its length on both sides. The limiting bosses 404 are arranged parallel to the mounting grooves 401 in the length direction. The first set of limiting mechanisms and the second set of limiting mechanisms are respectively engaged on the limiting platforms on both sides of the guide rail.

[0065] Each section of the guide rail can also be provided with a safety groove 406 along its length for assembling a detachable internal locking track fall arrestor. The bottom of the safety groove 21 is provided with fall arrestor slots 405 at intervals. The main function of the fall arrestor slots 405 is to secure the internal locking fall arrestor in case of a sudden fall by the operator. It can also serve as an assembly slot for fixing the guide rail to a ladder or mounting frame. The detachable internal locking track fall arrestor is assembled in the safety groove and connected to the operator's safety belt, rising and falling synchronously with the portable sprocket lift. When the operator suddenly falls, the hook on the internal locking track fall arrestor can be quickly engaged into the fall arrestor slot 20, thus stopping the machine to the locked position. Therefore, the rail provided by this utility model, when installed on a ladder for vertical movement, can also accommodate internal locking fall arrestors, satisfying both the needs of a portable sprocket lift and the requirements of internal locking fall arrestors. The detachable internal locking track fall arrestor is existing technology; its detailed structure will not be described here.

[0066] This portable sprocket lifter features an open track with roller chains mounted on the sprockets. This chain-structured track can be easily installed and fixed in various working environments. Especially when made of high-quality stainless steel, it is well-suited for harsh environments such as offshore, wind turbine towers, and hydroelectric shafts, effectively reducing construction difficulty and maintenance costs. The track is composed of multiple guide rail segments spliced ​​together end-to-end. The guide rails can be made straight or curved to suit various working environments. The guide rails can also be equipped with slots for internal locking anti-fall buckles, allowing operators to safely ascend and descend when the sprocket lifter is not in use. The open roller chain structure guide rail can be made of rigid aluminum, offering structural stability and high load-bearing capacity, unlike soft chains which exhibit deflection and eliminate the need for tension considerations. All components of each guide rail segment can be made of highly corrosion-resistant materials, such as stainless steel or aluminum, suitable for harsh environments, particularly for use in hydroelectric and offshore wind turbine ladders. Furthermore, its completely open design means that once installed, no meticulous maintenance is required, thus significantly reducing maintenance costs. Compared to crank-slider mechanisms, cam mechanisms, rack and pinion mechanisms, and screw mechanisms, the portable sprocket lift and rail lifting system occupies less space and is more suitable for long-distance or harsh outdoor environments.

[0067] Therefore, the portable sprocket lifter provided by this utility model, in conjunction with a dedicated track, can convert the rotation of the sprocket into linear or curvilinear motion. The track can be designed and adjusted according to the sprocket parameters in the portable sprocket lifter to ensure the rotation speed of the sprocket, thus significantly improving the working efficiency of the portable lifter. Furthermore, the track is supported by guide rails, open at both ends, and has excellent rigidity, thus possessing excellent load-bearing capacity and safety, while reducing the complexity and cost of installation and maintenance in the workplace.

[0068] Furthermore, in the direction in which the vertical beam 27 slides along the vertical beam guide rail, the sliding groove 274 provides redundant space for the vertical beam 27 to continue moving a set distance after being locked. This redundant space allows the X-axis limiting mechanism on the handle side to adaptively shift away from the track side under the pressure of the arc track, in order to adapt to different curved tracks. Therefore, in this embodiment of the present invention, the guide rail with the open roller chain structure can adapt to curved motion on the same plane, such as the gate operation of water and electricity. When different floors need to be staggered with ladders, this type of guide rail is required to be used in conjunction with a portable sprocket lift. When reaching the floor connection point, there is no need to disassemble the machine to replace the track; the sprocket lift can be directly operated to seamlessly connect the floor positions.

[0069] like Figure 1As shown, the portable sprocket lifter provided by this utility model can also be equipped with an upper limit trigger rod 31. When the portable sprocket lifter rises to the top of the open track 40, the upper limit trigger rod 31 is blocked by the limit plate on the track 40. The upper limit trigger rod 31 triggers the integrated limit sensor, preventing the portable sprocket lifter from continuing to rise and preventing an overshoot accident.

[0070] The portable sprocket lifter provided by this utility model can use a lithium battery as a mobile power source. When the lithium battery 34 is out of power, it can be quickly replaced. If there is no replaceable lithium battery 34, the manual lowering cover 35 can be removed and the internal manual lowering lever can be moved to move the sprocket lifter down to a safe location, thus preventing personnel or materials from being suspended in the air for a long time.

[0071] In summary, the portable sprocket lifter provided by this utility model embodiment is compact, lightweight, and easy and quick to operate.

[0072] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A portable sprocket lifter, characterized in that, The device includes a support plate (11), and a first set of limiting mechanisms, at least one sprocket, a drive assembly, and a limiting assembly respectively mounted on the support plate (11). The first set of limiting mechanisms includes at least two limiting members for engaging with one side of the track of the portable sprocket lifter. The drive assembly drives the sprocket to travel along the track. The limiting assembly includes a second set of limiting mechanisms, an operating handle (21), a rotary shaft (23), a lever (25), a compression spring limiting cylinder (26), a compression spring (261), a vertical beam (27), a linear bearing, a vertical beam guide rail, a handle fixing shaft (29), a positioning body, and a lever. The second set of limiting mechanisms is mounted on the vertical beam (27). The second set of limiting mechanisms includes at least two limiting members for engaging with the other side of the track. The vertical beam (27) is mounted on the support fixing plate (11) via the linear bearing and the vertical beam guide rail; one end of the handle fixing shaft (29) is fixedly connected to the operating handle, and the other end is fixedly connected to the toggle lever (25); the positioning body and the toggle body are respectively fixed at both ends of the toggle lever (25) and located on both sides of the vertical beam (27); one end of the rotary shaft (23) is fixed on the support fixing plate (11), one end of the compression spring limiting sleeve (26) is fitted on the rotary shaft (23), and the other end is fixedly connected to the handle fixing shaft (29); the compression spring (261) is mounted in the compression spring limiting sleeve (26); When the operating handle is in the first position, the positioning body is locked on one side of the vertical beam (27). Rotating the operating handle (21) causes the handle fixing shaft (29) and the actuating rod (25) to rotate around the rotary shaft (23), causing the positioning body to leave the vertical beam (27) and causing the actuating body to move the vertical beam (27) from the other side of the vertical beam (27). The vertical beam (27) slides along the vertical beam guide rail under the constraint of the linear bearing. The second set of limiting mechanisms moves away from the first set of limiting mechanisms, and the distance between the first set of limiting mechanisms and the second set of limiting mechanisms increases accordingly.

2. The portable sprocket lifter as described in claim 1, characterized in that, The positioning body includes a positioning bearing (291), the actuating body includes an actuating bearing (252), the positioning bearing (291) is installed at the other end of the handle fixing shaft (29) or at one end of the actuating rod (25), the actuating bearing (252) is installed at the other end of the actuating rod (25), and a positioning groove (276) is provided on one side of the vertical beam (27) to lock the positioning body.

3. The portable sprocket lifter as described in claim 1, characterized in that, The limiting integration also includes: a compression spring sliding rod (293), and a rod limiting groove (263) is provided on the compression spring limiting cylinder (26). One end of the compression spring sliding rod (293) is fixed on the handle fixing shaft (29). The rod limiting pin (294) passes through the hole of the rod limiting groove (263) and the compression spring sliding rod (293). The compression spring (261) and the compression spring limiting cylinder (26) are installed on the compression spring sliding rod (293).

4. The portable sprocket lifter as described in claim 1, characterized in that, The vertical beam (27) is assembled on the support fixing plate (11) through the linear bearing and the vertical beam guide rail. Specifically, the linear bearing includes two linear bearings (271), and the vertical beam guide rail includes two cylindrical pin guide rails (272). Each linear bearing (271) is fixed on the vertical beam (27), and the guide hole of each linear bearing (271) is assembled on the corresponding cylindrical pin guide rail (272). The cylindrical pin guide rail (272) is fixed on the support fixing plate (11).

5. The portable sprocket lifter as described in claim 1, characterized in that, The portable sprocket lifter also includes at least one third set of limiting mechanisms supported between the support plate (11) and the track, the third set of limiting mechanisms being fixed on the support plate (11).

6. The portable sprocket lifter as described in claim 5, characterized in that, Each of the third set of limiting mechanisms includes two Y-direction limiting bearings (144), a disc spring (142), a column (141) located between the two Y-direction limiting bearings (144), two spacers (146) located on both sides of one end of the column (141), and a locking screw (147) passing through the two Y-direction limiting bearings (144), one end of the column (141) and the two spacers (146), a screw nut (145) for locking the locking screw (147), the disc spring (142) being fitted onto the other end of the column (141), and the other end of the column (141) being fixed on the support fixing plate (11).

7. The portable sprocket lifter as described in claim 1, characterized in that, The track includes at least one guide rail, which includes a linear guide rail and an arc-shaped guide rail. Each guide rail has at least one mounting groove along its length. Each mounting groove is fitted with at least one row of roller chains. Each row of roller chains includes a set of rollers arranged in parallel. Each roller is threaded onto a pin. Each pin is fixed in the mounting groove. There is a set spacing between every two adjacent rollers. The set spacing is set according to the parameters of the sprocket. Each section of the guide rail is also provided with a limiting boss on both sides along the length direction. Each limiting boss is arranged parallel to the assembly groove in the length direction. The first set of limiting mechanisms and the second set of limiting mechanisms are respectively clamped onto one of the limiting bosses. Each section of the guide rail is also provided with a safety groove along the length direction for assembling a detachable internal locking rail anti-fall buckle, and the bottom of the safety groove is provided with anti-fall buckle slots at intervals along the length direction.

8. The portable sprocket lifter as described in claim 1, characterized in that, The limiting body includes a limiting bearing and an H-shaped guide wheel.

9. The portable sprocket lifter according to any one of claims 1 to 8, characterized in that, The limiting integration also includes a handle limiting lock (22), a locking spring (222), and a lock seat (221). The operating handle (21) is provided with a handle locking hole (212). The top of the handle limiting lock (22) is provided with a ramp. The lock seat (221) is installed on the vertical beam (27). The handle limiting lock (22) and the locking spring (222) are fitted together and installed in the hole of the lock seat (221). When the operating handle (21) moves back to the first position, the handle locking hole (212) slides across the ramp, and the handle limiting lock (22) springs into the handle locking hole (212), thereby locking the operating handle (21) in the first position.

10. The portable sprocket lifter as described in claim 9, characterized in that, The limiting integration also includes two vertical beam limiting locks (12) that lock the vertical beam (27) to the support fixing plate (11) at the first position. Each vertical beam limiting lock (12) is assembled on the support fixing plate (11). Each vertical beam limiting lock (12) includes a locking tongue (122) fitted with a locking tongue spring (123). The vertical beam (27) is provided with a sliding groove (274) corresponding to the locking tongue (122). In the direction in which the vertical beam (27) slides along the vertical beam guide rail, the sliding groove (274) leaves redundant space for the vertical beam (27) to continue moving a set distance after being locked.

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