Double-shaft type lifting device

Abstract

The utility model relates to the technical field of hoisting, in particular to a double-shaft type lifting device. The device comprises a driving device. An output shaft of the driving device is in synchronous transmission connection with a first rotating shaft and a second rotating shaft which are located on the two sides of the output shaft of the driving device and have the same rotating speed. The first rotating shaft and the second rotating shaft are sleeved with the winding drums respectively, the winding drums are connected with hanging belts, and one ends of the hanging belts are fixedly connected to the winding drums; a rotating shaft support frame; the rotating shaft supporting frames are rotationally connected to the ends, away from the driving device, of the first rotating shaft and the second rotating shaft correspondingly. The first rotating shaft and the second rotating shaft of the device are in synchronous transmission rotation with the driving device, so that the rotating speeds of the winding drums arranged on the two rotating shafts are the same, the lifting belt is synchronously retracted and released, a plurality of lifting points are synchronously lifted, the periphery of a lifted object is stably lifted, and the lifting device is simple in structure and convenient to use and has great popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting, in particular to a double-axis lifting device. Background Art

[0002] There are many powered rotary lifting devices in the assembly lines of the manufacturing industry. Some of the equipment is large in area, and a single lifting point often cannot meet the conditions for the equipment to rise smoothly. It is often necessary to use multiple motors to provide multi-point power to make the equipment rise synchronously and smoothly on all sides. This will increase power costs and it is difficult to achieve the purpose of synchronous lifting. It is easy to cause a certain point to rise quickly, increasing the cost of assembly and debugging. Utility Model Content

[0003] The main purpose of the utility model is to solve the deficiencies of the above-mentioned background technology and provide a double-axis lifting device.

[0004] The technical solution adopted by the utility model is: a double-axis lifting device, comprising:

[0005] A driving device, wherein an output shaft of the driving device is synchronously connected to a first rotating shaft and a second rotating shaft having the same rotation speed, and the first rotating shaft and the second rotating shaft are located on opposite sides of the output shaft of the driving device;

[0006] A reel, wherein the reel is sleeved on the first rotating shaft and the second rotating shaft respectively, and a sling is connected to the reel, and one end of the sling is fixedly connected to the reel;

[0007] A rotating shaft support frame; the rotating shaft support frame is rotatably connected to the first rotating shaft and the second rotating shaft at one end away from the driving device to support the first rotating shaft and the second rotating shaft.

[0008] Furthermore, a steering fixed pulley is provided on one side of the drum; the other end of the sling fits around the steering fixed pulley and then hangs down.

[0009] Furthermore, a plurality of drums with slings are provided on the first rotating shaft; and the positions of the rotating fixed pulleys corresponding to the drums are respectively arranged on opposite sides of the first rotating shaft.

[0010] Furthermore, the steering fixed pulley comprises a steering bracket, a fixed pulley rotatably connected to the steering bracket, and an anti-slip plate fixed to the steering bracket; a gap for the sling to pass through is provided between the anti-slip plate and the circumferential side surface of the fixed pulley.

[0011] Furthermore, a rotating shaft support frame is provided on both sides of the first rotating shaft and / or the second rotating shaft at the reel.

[0012] Furthermore, the rotating shaft support frame includes a bearing support and a bearing fixed on the bearing support; the first rotating shaft and the second rotating shaft are respectively inserted into the inner hole of the bearing.

[0013] Furthermore, it also includes a sling guide seat, which is arranged on the sling and is used to vertically correct the direction of the sling.

[0014] Furthermore, the sling guide seat includes a guide mounting frame, and a plurality of first rollers and second rollers rotatably connected to the guide mounting frame; the first rollers are located on both sides of the sling thickness direction and roll against the sling; the second rollers are located on both sides of the sling width direction to limit the sling in the sling width direction.

[0015] Furthermore, the reel is sleeved on the first rotating shaft and the second rotating shaft is transmission-connected via a key tooth structure.

[0016] Furthermore, the driving device comprises a hollow shaft motor, the output shaft of the hollow shaft motor is an output hollow shaft; the first rotating shaft and the second rotating shaft are respectively sleeved in the output hollow shaft and synchronously connected with the hollow output shaft through a key tooth structure.

[0017] Furthermore, the sling comprises a belt.

[0018] The advantages of the utility model include: 1. The driving device synchronously drives and connects the first rotating shaft and the second rotating shaft, so that the two rotating shafts can rotate synchronously, that is, the rotation speed is the same, and the drum is arranged on the two rotating shafts to synchronously rotate and release the sling, and can synchronously lift and lower the lifting point where the sling is connected to the hoisting object, so that the hoisted object can be synchronously and steadily raised all around; the relative arrangement of the two shafts can better transmit the torque of the driving device to the drum; the rotating shaft support frame supports the two rotating shafts in a limited position, which can reduce the vertical force on the driving device, improve the safety of the device, and extend the service life of the driving device;

[0019] 2. The steering fixed pulley can disperse the lifting points, making the lifting objects rise and fall more smoothly;

[0020] 3. Multiple drums form multiple lifting points to pull the objects being hoisted, which is conducive to improving the stability of the objects being hoisted during the lifting process, adapting to the lifting of objects with larger surface areas, and having higher versatility; the fixed pulleys are arranged on the opposite sides of the two rotating shafts, so that multiple slings pull the rotating shafts on both sides of the rotating shafts, and there is an offset force, which prevents the slings from being concentrated on one side of the rotating shaft, which will cause excessive traction and aggravate the strain of the rotating shaft support frame and the rotating shaft, prolong the service life, and at the same time improve the safety of the device;

[0021] 4. The anti-drop plate can limit the sling in the gap between the fixed pulley and the anti-drop plate to prevent the sling from falling off the fixed pulley, leaving a safety hazard;

[0022] 5. The rotating shaft support frame supports the rotating shaft on both sides of the reel, so that the force exerted by the reel on the rotating shaft is mainly limited and supported by the rotating shaft support frame, so that the driving device is responsible for driving the two rotating shafts to rotate, avoiding the damage of the driving device caused by supporting the rotating shaft, making the device safer;

[0023] 6. The rotating shaft support frame has a simple structure. The bearing is supported by the bearing support. The rotating shaft is inserted into the bearing to achieve a rotational connection with the rotating shaft. It has a limiting effect on the rotating shaft in the radial direction of the bearing.

[0024] 7. The sling guide seat can vertically straighten and limit the sagging sling to prevent the sling from being too hard to sag vertically, and can also make the sling close to the steering fixed pulley;

[0025] 8. The guide mounting frame uses a plurality of first rollers and second rollers to limit the sling in the horizontal and vertical directions, so that the sling can only move vertically;

[0026] 9. The first rotating shaft and the second rotating shaft are connected to the output shaft of the driving device through the key tooth structure, so that synchronous rotation can be achieved, and the connection is simple and convenient;

[0027] 10. A hollow shaft motor is used, and its output hollow shaft is very convenient for connecting the first rotating shaft and the second rotating shaft, and making the two rotating shafts rotate synchronously, so as to realize synchronous lifting and lowering of the slings connected to different rotating shafts.

[0028] The first rotating shaft and the second rotating shaft of the utility model are synchronously connected with the driving device to realize synchronous rotation, so that the drums arranged on the two rotating shafts rotate synchronously, and then the slings are synchronously retracted and released, so as to realize synchronous lifting of multiple lifting points, so that the hoisted objects can be lifted and lowered smoothly all around. The utility model has a simple structure, is easy to use, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 : Structural diagram of a dual-axis lifting device;

[0030] Figure 2 : A schematic diagram of the front structure of a dual-axis lifting device;

[0031] Figure 3 : A schematic diagram of the side structure of a dual-axis lifting device;

[0032] Figure 4 : A schematic diagram of the front view of an embodiment of a dual-axis lifting device;

[0033] Figure 5 : Schematic diagram of the top view of the sling guide seat;

[0034] Figure 6 : A side structural diagram of the sling guide seat;

[0035] Figure 7 : A schematic diagram of the front view of the sling guide seat;

[0036] Figure 8 : Schematic diagram of the steering fixed pulley structure;

[0037] Fig. 9 : Schematic diagram of the top view of the steering fixed pulley;

[0038] Fig.10 : Schematic diagram of the reel structure;

[0039] Fig.11 : Schematic diagram of the side view of the reel structure;

[0040] Among them: 1-driving device; 11-first rotating shaft; 12-second rotating shaft; 2-reel; 21-sling; 3-rotating shaft support frame; 31-bearing support; 32-bearing; 4-steering fixed pulley; 41-steering bracket; 42-fixed pulley; 43-anti-slip plate; 44-spacer; 5-sling guide seat; 51-guide mounting frame; 511-vertical plate; 52-first roller; 53-second roller. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] The utility model relates to a double-axis lifting device, which can lift objects stably. A first rotating shaft 11 and a second rotating shaft 12 are synchronously connected to the output shaft of a driving device 1 to realize synchronous rotation. The double shafts are relatively arranged on both sides of the output shaft of the driving device 1 to better transmit the torque to a drum 2 sleeved on the two rotating shafts. The two rotating shafts rotate synchronously to make multiple drums 2 rotate synchronously, and the slings 21 are synchronously retracted and released, so that multiple lifting points are synchronously lifted and lowered, thereby realizing smooth lifting of the hoisted objects.

[0046] The utility model relates to a double-axis lifting device, such as Figures 1 to 11 As shown, it includes a driving device 1, a reel 2 and a rotating shaft support frame 3, the output shaft of the driving device 1 is synchronously connected with a first rotating shaft 11 and a second rotating shaft 12 with the same rotation speed, and the first rotating shaft 11 and the second rotating shaft 12 are located on the opposite sides of the output shaft of the driving device 1; the reel 2 is respectively sleeved on the first rotating shaft 11 and the second rotating shaft 12 and rotates synchronously with the connected first rotating shaft 11 and the second rotating shaft 12, and can be fixedly connected to wind and accommodate a sling 21 with one end fixed to the reel, and the other end of the sling 21 is used to hang down and connect to the suspended object; the rotating shaft support frame 3 is rotatably connected to the end of the first rotating shaft 11 away from the driving device 1 to support the first rotating shaft 11, and the rotating shaft support frame 3 is rotatably connected to the end of the second rotating shaft 12 away from the driving device 1 to support the second rotating shaft 12. Each sling 21 on the drum 2 forms a lifting point, and the two slings 21 are convenient for lifting objects with a large lateral area, heavy weight, and that need to be lifted smoothly, etc.; the rotating shaft support frame 3 supports the first rotating shaft 11 and the second rotating shaft 12 at the end away from the driving device 1, thereby improving the stability and safety of the device.

[0047] like Figures 1-2 As shown, in one embodiment, a steering fixed pulley 4 is correspondingly provided on one side of the drum 2, so that one end of the sling 21 is connected to the drum 2, and the other end is fitted around the steering fixed pulley 4 and then droops. The steering fixed pulley 4 can change the drooping position of the sling, and the dispersed lifting points can adapt to various lifting scenes.

[0048] like Figure 1 , Figure 3As shown, in one embodiment, a plurality of drums 2 are provided on the first rotating shaft 11, and the slings 21 of the plurality of drums 2 extend to both sides of the first rotating shaft 11 respectively, and the steering fixed pulleys 4 corresponding to the positions of the drums 2 are respectively arranged on both sides of the first rotating shaft 11, so that the slings 21 connected to the drums 2 on the first rotating shaft 11 can be hung down after being wrapped around the corresponding steering fixed pulleys 4; similarly, a plurality of drums 2 are provided on the second rotating shaft, and the steering fixed pulleys 4 corresponding to the plurality of drums 2 are respectively arranged on opposite sides of the second rotating shaft 12, so that a plurality of hanging points can be dispersed on both sides of the first rotating shaft and the second rotating shaft, and the hanging points on both sides pull the first rotating shaft 11 and the second rotating shaft 12 in opposite directions to form an offsetting force, which can reduce the load of the rotating shaft support frame, improve the safety of the device, avoid the excessive traction force caused by the concentration of multiple hanging points on one side, aggravating the wear of the rotating shaft support frame 3 and the rotating shaft, and prolong the service life.

[0049] In one embodiment, Figures 8-9 As shown, the steering fixed pulley 4 includes a steering bracket 41, a fixed pulley 42 and an anti-slip plate 43 for fixing. The fixed pulley 42 is rotatably connected to the steering bracket 41, and the anti-slip plate 43 is fixedly arranged on the steering bracket 41. A gap through which the sling 21 can pass is provided between the anti-slip plate 43 and the circumferential side of the fixed pulley 42, and the anti-slip plate 43 is preferably arranged on the side of the fixed pulley 42 away from the reel 2. The anti-slip plate 43 can also be arranged on the top of the fixed pulley 42, and a spacer 44 is provided between the two sides of the fixed pulley 42 and the steering bracket 41 for noise reduction. When in use, the sling 21 passes through the gap between the anti-slip plate 43 and the fixed pulley 42 and droops after being wrapped around the fixed pulley 42, changing the direction of the sling 21. The anti-slip plate 43 can prevent the sling 21 from detaching from the fixed pulley 42 during the lifting process to generate a safety hazard, thereby improving the safety of the device.

[0050] like Figure 4 As shown, the reels 2 on the first rotating shaft 11 are centrally arranged on the first rotating shaft, and the rotating shaft support frames 3 are rotatably connected to the two sides of the centralized reels 2 on the first rotating shaft, and / or the reels 2 on the second rotating shaft 12 are centrally arranged, and the rotating shaft support frames 3 are also arranged on the two sides of the centralized reels 2 on the second rotating shaft 12. When the reels 2 on the first rotating shaft 11 and / or the second rotating shaft 12 are dispersedly arranged, the rotating shaft support frames 3 can be arranged between the reels 2 to support the corresponding first rotating shaft 11 and / or the second rotating shaft 12, so that the traction force generated by the sling 21 on the first rotating shaft 11 and / or the second rotating shaft 12 is borne by the rotating shaft support frames 3, so that the driving device 1 is mainly responsible for driving the two rotating shafts to rotate, and it is avoided that the end of the first rotating shaft 11 and / or the second rotating shaft 12 connected to the driving device 1 generates a large horizontal force on the driving device 1, which aggravates the strain of the driving device 1, the first rotating shaft 11 and / or the second rotating shaft 12.

[0051] In one embodiment, the specific structure of the rotating shaft support frame 3 is described. The rotating shaft support frame 3 includes a bearing support 31 and a bearing 32 for fixing. The bearing support 31 is provided with a mounting hole and a fixing hole connected to the mounting hole. The fixing hole is arranged around the connected mounting hole. The bearing 32 is adapted to be matched in the mounting hole. The outer ring of the bearing 32 is provided with a plurality of radial threaded holes. The threaded holes are arranged corresponding to the connected fixing holes. The outer ring of the bearing 32 is threadedly connected in the threaded holes through the fixing holes by means of a top screw. The inner hole of the bearing 32 is adapted to be matched (interference fit connection) on the first rotating shaft 11 and the second rotating shaft 12. The rotating shaft support frame 3 has a simple structure. The first rotating shaft 11 and the second rotating shaft 12 are rotatably connected to the support frame through the bearing 32, and the first rotating shaft 11 and the second rotating shaft 12 can be radially limited to play a supporting role.

[0052] like Figures 2 to 4 As shown, in one embodiment, the device also includes a sling guide seat 5, which is arranged on the drooping section of the sling 21 and is used to vertically correct the direction of the sling 21. This can prevent the sling 21 from being unable to droop in the vertical direction after being wound around the reel 2 or the steering fixed pulley 4 due to the sling 21 being made of too hard a material. When winding around the steering fixed pulley 4, the sling 21 can be attached to the steering fixed pulley 4 to avoid slipping.

[0053] In one embodiment, Figures 5 to 7 As shown, the sling guide seat 5 includes a guide mounting frame 51 for fixing, a plurality of first rollers 52 and a plurality of second rollers 53. The guide mounting frame 51 includes two vertical plates 511. The two vertical plates 511 are spaced apart and arranged parallel to the sling 21 (drooping section). The two vertical plates 511 are rotatably connected with a rotating shaft ( Figure 5 The first roller 52 (in dashed line) is parallel to the width direction of the sling 21. The sling 21 passes between the two vertical plates 511 and is clamped and limited by the two first rollers 52 in a rolling contact manner, so that the sling 21 is limited in the thickness direction of the sling 21; the two vertical plates 511 are located on both sides of the width direction of the sling 21 and respectively rotate with second rollers 53 whose rotation axes are parallel to the thickness of the sling 21. The second rollers 53 on both sides of the vertical plates 511 are located on both sides of the width direction of the sling 21. The outer circumference of the second rollers 53 can roll with the thickness surface of the sling 21 to limit the sling 21 in the width of the sling 21. Preferably, two vertically arranged second rollers 53 are provided on the side of the vertical plates 511, that is, the sling 21 is limited in the width direction by four second rollers 53. The sling 21 is limited in the width and thickness directions by multiple first rollers 52 and second rollers 53, and can be lifted and moved along the length direction.

[0054] In a certain embodiment, the output shaft of the driving device 1 is meshed with the first rotating shaft 11 and the second rotating shaft 12 located on both sides of the output shaft of the driving device 1 through a key tooth structure to achieve a synchronous transmission connection. The key tooth structures of the first rotating shaft 11 and the second rotating shaft 12 are the same, so that the rotation speeds are the same. In a specific implementation scheme, an active key tooth is provided on the output shaft of the driving device 1, and driven key teeth meshing with the active key teeth are provided at the ends of the first rotating shaft 11 and the second rotating shaft 12. The first rotating shaft 11 and the second rotating shaft 12 are meshed with the driven key teeth on both sides of the active key teeth of the output shaft to achieve a synchronous transmission connection. The connection between the reel 2 and the first rotating shaft 11 and the second rotating shaft 12 can also adopt a key tooth structure for synchronous rotation, such as Fig.11 As shown, the reel 2 is sleeved on the first rotating shaft 11 and the second rotating shaft 12, a groove is provided on the inner hole of the reel 2, and a transmission protrusion (i.e., key teeth) inserted into the groove is provided on the first rotating shaft 11 and the second rotating shaft 12. When the first rotating shaft 11 and the second rotating shaft 12 rotate in opposite directions, the winding direction of the sling 21 on the reel 2 can be changed, so that the reels 2 on the first rotating shaft 11 and the second rotating shaft 12 can both retract and release the sling 21 synchronously.

[0055] In one embodiment, Figure 4 As shown, the drive device 1 adopts a hollow shaft motor, the output shaft of the hollow shaft motor is an output hollow shaft, the first rotating shaft 11 and the second rotating shaft 12 are respectively sleeved in the output hollow shaft and synchronously connected with the hollow output shaft through a key tooth structure, so that the first rotating shaft 11 and the second rotating shaft 12 can be coaxially arranged and have the same direction, which can increase the effective contact surface of the output hollow shaft key teeth and facilitate the connection of the first rotating shaft 11 and the second rotating shaft 12. In order to increase the stability and power of the hoisting of this device, a hollow shaft reduction motor is preferably used as the drive device 1, and the output hollow shaft speed control is slower and more accurate, and the hoisting load is larger.

[0056] The sling 21 includes but is not limited to a belt. The belt is selected as the sling 21 because it has a certain toughness and is wear-resistant. It ensures strength while being convenient for curling and storage.

[0057] like Figures 1-2 As shown, the device preferably has four reels 2 evenly arranged on the first rotating shaft 11 and the second rotating shaft 12, and the slings 21 of the two reels 2 sleeved on the first rotating shaft 11 are pulled out along the two sides of the first rotating shaft 11, bypass the corresponding steering fixed pulley 4 and hang down; the slings 21 of the two reels 2 sleeved on the second rotating shaft 12 are pulled out along the two sides of the second rotating shaft 12, bypass the corresponding steering fixed pulley 4 and hang down, and a sling guide seat 5 is provided on the hanging section of each sling 21, so that the object can be lifted through four lifting points.

[0058] During actual use, after the bottom end of each sling 21 is connected to the scattered connection points of the hoisted object, the driving device 1 is started, and the output hollow shaft of the driving device 1 drives the first rotating shaft 11 and the second rotating shaft 12 to rotate synchronously, and the reel 2 sleeved on the first rotating shaft 11 and the second rotating shaft 12 rotates synchronously to wind and store the sling 21. The upper part of each sling 21 is turned by the steering fixed pulley 4 and then wound on the reel 2, so as to achieve stable hoisting of objects.

[0059] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A dual-axis lifting device, characterized in that: include, A driving device (1), wherein an output shaft of the driving device (1) is synchronously connected to a first rotating shaft (11) and a second rotating shaft (12) having the same rotation speed, and the first rotating shaft (11) and the second rotating shaft (12) are located on opposite sides of the output shaft of the driving device (1); A reel (2), wherein the reel (2) is sleeved on the first rotating shaft (11) and the second rotating shaft (12), and a sling (21) is connected to the reel (2), and one end of the sling (21) is fixedly connected to the reel (2); A rotating shaft support frame (3); the rotating shaft support frame (3) is rotatably connected to the first rotating shaft (11) and the second rotating shaft (12) at one end away from the driving device (1) to support the first rotating shaft (11) and the second rotating shaft (12).

2. A dual-axis lifting device as claimed in claim 1, characterized in that: A deflection fixed pulley (4) is provided on one side of the reel (2); the other end of the sling (21) fits around the deflection fixed pulley (4) and then hangs down.

3. A dual-axis lifting device as claimed in claim 2, characterized in that: A plurality of reels (2) with slings (21) are arranged on the first rotating shaft (11); the positions of the deflection fixed pulleys (4) corresponding to the reels (2) are arranged on opposite sides of the first rotating shaft (11).

4. A dual-axis lifting device according to any one of claims 2 or 3, characterized in that: The deflection fixed pulley (4) comprises a deflection bracket (41), a fixed pulley (42) rotatably connected to the deflection bracket (41), and an anti-slip plate (43) fixedly arranged on the deflection bracket (41); a gap is arranged between the anti-slip plate (43) and the circumferential side surface of the fixed pulley (42) for the sling (21) to pass through.

5. A dual-axis lifting device as claimed in claim 1, characterized in that: A rotating shaft support frame (3) is provided on both sides of the first rotating shaft (11) and / or the second rotating shaft (12) located on the reel (2).

6. A dual-axis lifting device according to claim 1 or 5, characterized in that: The rotating shaft support frame (3) comprises a bearing support (31) and a bearing (32) fixed on the bearing support (31); the first rotating shaft (11) and the second rotating shaft (12) are respectively inserted into the inner hole of the bearing (32).

7. A dual-axis lifting device as claimed in claim 1, characterized in that: It also comprises a sling guide seat (5), wherein the sling guide seat (5) is arranged on the sling (21) and is used for vertically correcting the direction of the sling (21).

8. A dual-axis lifting device as claimed in claim 7, characterized in that: The sling guide seat (5) comprises a guide mounting frame (51), a plurality of first rollers (52) and a second roller (53) which are rotatably connected to the guide mounting frame (51); the first rollers (52) are located on both sides of the sling (21) in the thickness direction and roll against the sling (21); the second rollers (53) are located on both sides of the sling (21) in the width direction and upper limit the sling (21) in the width direction of the sling (21).

9. A dual-axis lifting device as claimed in claim 1, characterized in that: The output shaft of the driving device (1) is meshedly connected to a first rotating shaft (11) and a second rotating shaft (12) located on both sides of the output shaft of the driving device (1) via a key tooth structure.

10. A dual-axis lifting device as claimed in claim 9, characterized in that: The driving device (1) comprises a hollow shaft motor, the output shaft of the hollow shaft motor is an output hollow shaft; the first rotating shaft (11) and the second rotating shaft (12) are respectively sleeved in the output hollow shaft and synchronously connected with the hollow output shaft through a key tooth structure.

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