CN222389468U - Double-shaft lifting device - Google Patents

Abstract

The utility model relates to the field of hoisting technology, and specifically refers to a dual-axis lifting device. The device includes a driving device, wherein the output shaft of the driving device is synchronously connected to a first rotating shaft and a second rotating shaft located on both sides of the output shaft of the driving device and having the same rotation speed; a reel, wherein the reel is respectively sleeved on the first rotating shaft and the second rotating shaft, and a sling is connected to the reel, and one end of the sling is fixed to the reel; a rotating shaft support frame; wherein the rotating shaft support frame is respectively rotatably connected to one end of the first rotating shaft and the second rotating shaft away from the driving device. The first rotating shaft and the second rotating shaft of the device are synchronously driven and rotated with the driving device, so that the speed of the reels arranged on the two rotating shafts is the same, and then the slings are synchronously retracted and released, so as to achieve synchronous lifting of multiple lifting points, so that the hoisted object can be lifted and lowered smoothly all around. The structure is simple, easy to use, and has great promotion value.

Description

Double-shaft lifting device

Technical Field

The utility model relates to the technical field of hoisting, in particular to a double-shaft type lifting device.

Background

In the assembly line of manufacturing industry, there are many rotatory lifting means of power, and some equipment areas are great, and single lifting point often has not satisfied the steady condition that rises of equipment, often needs to use a plurality of motors to provide the multiple spot power, makes equipment synchronous steady rising all around, can increase power cost like this, and hardly reaches synchronous lifting's purpose, easily causes the phenomenon that a certain point rises fast, has increased assembly debugging cost.

Disclosure of utility model

The utility model aims to solve the defects of the background technology and provides a double-shaft lifting device.

The technical proposal adopted by the utility model is that the double-shaft lifting device comprises,

The output shaft of the driving device is synchronously connected with a first rotating shaft and a second rotating shaft with the same rotating speed in a transmission way, and the first rotating shaft and the second rotating shaft are positioned on two opposite sides of the output shaft of the driving device;

The winding drum is sleeved on the first rotating shaft and the second rotating shaft respectively, the winding drum is connected with a hanging belt, and one end of the hanging belt is fixedly connected to the winding drum;

The rotating shaft support frame is respectively connected to one ends of the first rotating shaft and the second rotating shaft far away from the driving device in a rotating way and used for supporting the first rotating shaft and the second rotating shaft.

Further, one side of the winding drum is provided with a steering fixed pulley, and the other end of the sling is attached to the steering fixed pulley and then sags.

Further, the first rotating shaft is provided with a plurality of winding drums with hanging strips, and the positions of the steering fixed pulleys corresponding to the winding drums are respectively arranged on two opposite sides of the first rotating shaft.

Further, the steering fixed pulley comprises a steering bracket, a fixed pulley rotatably connected to the steering bracket and an anti-falling plate fixedly arranged on the steering bracket, wherein a gap for a sling to pass through is formed between the anti-falling plate and the circumferential side surface of the fixed pulley.

Further, the first rotating shaft and/or the second rotating shaft are/is provided with rotating shaft supporting frames on two sides of the winding drum.

Further, the rotating shaft supporting frame comprises a bearing support and a bearing fixedly arranged on the bearing support, and the first rotating shaft and the second rotating shaft are respectively inserted into the inner holes of the bearing.

Further, the lifting belt guide seat is arranged on the lifting belt and used for vertically correcting the direction of the lifting belt.

The sling guide seat comprises a guide mounting frame, and a plurality of first rollers and second rollers which are all rotatably connected to the guide mounting frame, wherein the first rollers are positioned on two sides of the sling in the thickness direction and roll to abut against the sling, and the second rollers are positioned on two sides of the sling in the width direction and limit the sling in the width direction.

Further, the winding drum is sleeved on the first rotating shaft and the second rotating shaft and is in transmission connection through the key tooth structure.

The driving device comprises a hollow shaft type motor, an output shaft of the hollow shaft type motor is an output hollow shaft, and the first rotating shaft and the second rotating shaft are respectively sleeved in the output hollow shaft and are synchronously connected with the hollow output shaft in a transmission manner through a key tooth structure.

Further, the harness includes a belt.

The utility model has the advantages that 1, the driving device is connected with the first rotating shaft and the second rotating shaft in a synchronous transmission way, the two rotating shafts can synchronously rotate, namely the rotating speeds are the same, the winding drum is arranged on the two rotating shafts and can synchronously rotate to retract and retract the hanging belt, the lifting belt can synchronously lift the lifting point of the hoisted object to synchronously and stably lift the periphery of the hoisted object, the double shafts are oppositely arranged to better transmit the torque of the driving device to the winding drum, the rotating shaft supporting frame is used for limiting and supporting the two rotating shafts, the vertical acting force born by the driving device can be slowed down, the safety of the device is improved, and the service time of the driving device is prolonged;

2. Each lifting point can be dispersed through the steering fixed pulley, so that the lifted object can be lifted more stably;

3. The fixed pulleys are arranged on two opposite sides of the two rotating shafts, so that a plurality of hanging belts pull the rotating shafts on the two sides of the rotating shafts, and a counter-impact acting force is provided, so that the hanging belts are prevented from concentrating on one side of the rotating shafts, the overlarge traction force on one side of the rotating shafts aggravates the strain of the rotating shaft support frame and the rotating shafts, the service time is prolonged, and the safety of the device is improved;

4. the hanging strip can be limited in a gap between the fixed pulley and the anti-drop plate through the anti-drop plate, so that the hanging strip is prevented from dropping off from the fixed pulley, and potential safety hazards are left;

5. The rotating shaft supporting frames support the rotating shafts on two sides of the winding drum, so that acting force of the winding drum on the rotating shafts is mainly limited and supported by the rotating shaft supporting frames, the driving device is responsible for driving the two rotating shafts to rotate, the damage of the driving device for supporting the rotating shafts is avoided, and the device has higher safety;

6. The rotating shaft support frame is simple in structure, the bearing is supported by the bearing support, the rotating shaft is inserted into the bearing to realize rotating connection with the rotating shaft, and the rotating shaft is limited in the radial direction of the bearing;

7. The hanging strip guide seat can vertically straighten and limit the hanging strip which sags, so that the situation that the hanging strip is too hard and cannot vertically sag is avoided, and the hanging strip can be tightly attached to the steering fixed pulley;

8. The guide mounting frame limits the hanging belt in the transverse direction and the longitudinal direction through a plurality of first rollers and second rollers, so that the hanging belt can only move vertically;

9. The first rotating shaft and the second rotating shaft are in transmission connection with the output shaft of the driving device through the key tooth structure, so that synchronous rotation can be realized, and the connection is simple and convenient;

10. The hollow shaft type motor is adopted, the output hollow shaft of the hollow shaft type motor is very convenient to connect the first rotating shaft and the second rotating shaft, and the two rotating shafts synchronously rotate, so that the hanging strips connected to different rotating shafts can be synchronously lifted.

The first rotating shaft and the second rotating shaft are synchronously connected with the driving device in a transmission way to realize synchronous rotation, so that the reels arranged on the two rotating shafts synchronously rotate, further the hanging strip is synchronously retracted and released, a plurality of hanging points are synchronously lifted, the periphery of a hung object is stably lifted, and the lifting device has a simple structure, is convenient to use and has great popularization value.

Drawings

FIG. 1 is a schematic diagram of a double-shaft lifting device;

FIG. 2 is a schematic diagram of the elevation structure of a twin-shaft elevator;

FIG. 3 is a schematic side view of a two-axis elevator apparatus;

FIG. 4 is a schematic elevational view of one embodiment of a twin shaft elevator apparatus;

FIG. 5 is a schematic top view of the sling guide;

FIG. 6 is a schematic side view of the sling guide;

FIG. 7 is a schematic elevational view of the sling guide;

FIG. 8 is a schematic view of the diverting pulley structure;

FIG. 9 is a schematic top view of the diverting pulley;

FIG. 10 is a schematic view of a spool construction;

FIG. 11 is a schematic side view of the spool;

the device comprises a 1-driving device, a 11-first rotating shaft, a 12-second rotating shaft, a 2-winding drum, a 21-hanging belt, a 3-rotating shaft supporting frame, a 31-bearing support, a 32-bearing, a 4-steering fixed pulley, a 41-steering support, a 42-fixed pulley, a 43-anti-falling plate, a 44-spacer, a 5-hanging belt guide seat, a 51-guiding installation frame, a 511-vertical plate, a 52-first roller and a 53-second roller.

Detailed Description

Embodiments of the present utility model are described in detail below, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The utility model will now be described in further detail with reference to the drawings and to specific examples.

The utility model relates to a double-shaft lifting device, which can stably lift an object, wherein a first rotating shaft 11 and a second rotating shaft 12 are synchronously connected with an output shaft of a driving device 1 in a transmission manner to realize synchronous rotation, double shafts are oppositely arranged on two sides of the output shaft of the driving device 1, torque can be better transmitted to reels 2 sleeved on the two rotating shafts, the two rotating shafts synchronously rotate a plurality of reels 2 to synchronously rotate, a hanging strip 21 is synchronously retracted and released, a plurality of hanging points synchronously lift, and the object to be lifted is stably lifted.

The utility model relates to a double-shaft lifting device, which is shown in figures 1-11, and comprises a driving device 1, a winding drum 2 and a rotating shaft support frame 3, wherein an 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 rotating speed in a transmission mode, the first rotating shaft 11 and the second rotating shaft 12 are positioned on two opposite sides of the output shaft of the driving device 1, the winding drum 2 is respectively sleeved on the first rotating shaft 11 and the second rotating shaft 12 and synchronously rotates with the connected first rotating shaft 11 and second rotating shaft 12, a fixedly connecting mode can be adopted for winding a hanging strip 21 with one end fixedly connected to the winding drum, the other end of the hanging strip 21 is used for hanging a hung object, the rotating shaft support frame 3 is rotatably connected to one end of the first rotating shaft 11 far away from the driving device 1 and supports the first rotating shaft 11, and the rotating shaft support frame 3 is rotatably connected to one end of the second rotating shaft 12 far away from the driving device 1 and supports the second rotating shaft 12. Each sling 21 on the winding drum 2 forms a lifting point, two slings 21 are convenient for lifting objects which are large in transverse area, heavy and need to be lifted stably, and the like, and the rotating shaft support frame 3 is used for limiting and supporting the first rotating shaft 11 and the second rotating shaft 12 at one end far away from the driving device 1, so that the stability and the safety of the device are improved.

As shown in fig. 1-2, in one embodiment, one side of the winding drum 2 is correspondingly provided with a fixed steering pulley 4, so that one end of the sling 21 is connected to the winding drum 2, and the other end is attached to the winding drum and sags after passing around the fixed steering pulley 4. The position of hanging belt sagging can be changed through the steering fixed pulley 4, and the scattered hanging points are suitable for hanging various different scenes.

As shown in fig. 1 and 3, in one embodiment, a plurality of reels 2 are disposed on a first rotating shaft 11, the hanging strips 21 of the reels 2 extend to two sides of the first rotating shaft 11, and the fixed pulleys 4 corresponding to the positions of the reels 2 are disposed at two sides of the first rotating shaft 11, so that the hanging strips 21 connected with the reels 2 on the first rotating shaft 11 can droop around the corresponding fixed pulleys 4, and similarly, a plurality of reels 2 are disposed on a second rotating shaft, the fixed pulleys 4 corresponding to the reels 2 are disposed at two opposite sides of the second rotating shaft 12, so that a plurality of hanging points are dispersed at two sides of the first rotating shaft and the second rotating shaft, the hanging points at two sides reversely pull the first rotating shaft 11 and the second rotating shaft 12 to form a thrust acting force, the load of the rotating shaft support frame can be reduced, the safety of the device is improved, the plurality of hanging points are prevented from concentrating on one side to excessively large traction force to aggravate the strain of the rotating shaft support frame 3 and the rotating shaft, and the service time is prolonged.

In one embodiment, as shown in fig. 8 to 9, the fixed steering pulley 4 includes a fixed steering bracket 41, a fixed pulley 42 and a drop-preventing plate 43, the fixed pulley 42 is rotatably connected to the fixed steering bracket 41, the drop-preventing plate 43 is fixedly arranged on the fixed steering bracket 41, a gap through which the hanging belt 21 can pass is arranged between the drop-preventing plate 43 and the circumferential side surface of the fixed pulley 42, preferably, the drop-preventing plate 43 is arranged on one side of the fixed pulley 42 away from the winding drum 2, the drop-preventing plate 43 can also be arranged on the top of the fixed pulley 42, and a spacer 44 is arranged between two sides of the fixed pulley 42 and the fixed steering bracket 41 for noise reduction. In use, the harness 21 passes through the gap between the anti-drop plate 43 and the fixed pulley 42 and sags around the fixed pulley 42 to change the direction of the harness 21. The safety hidden trouble caused by the fact that the hanging belt 21 is separated from the fixed pulley 42 in the hoisting process can be avoided through the anti-falling plate 43, and the safety of the device is improved.

As shown in fig. 4, the reels 2 on the first rotary shaft 11 are centrally arranged on the first rotary shaft, and the rotary shaft supporting frames 3 are rotatably connected to the two sides of the central reels 2 on the first rotary shaft, and/or the reels 2 on the second rotary shaft 12 are centrally arranged, and the rotary shaft supporting frames 3 are also arranged on the two sides of the central reels 2 on the second rotary shaft 12. When the reels 2 on the first rotation shaft 11 and/or the second rotation shaft 12 are arranged in a dispersed manner, the rotation shaft supporting frames 3 can be arranged between the reels 2 at intervals to support the corresponding first rotation shaft 11 and/or second rotation shaft 12, so that the traction force generated by the hanging strip 21 on the first rotation shaft 11 and/or the second rotation shaft 12 is borne by the rotation shaft supporting frames 3, the driving device 1 is mainly responsible for driving the two rotation shafts to rotate, and the situation that one end of the first rotation shaft 11 and/or the second rotation shaft 12 connected with the driving device 1 generates a larger acting force in the horizontal direction on the driving device 1 is avoided, and the strain of the driving device 1, the first rotation shaft 11 and/or the second rotation shaft 12 is increased.

In one embodiment, a specific structure of the rotating shaft supporting frame 3 is described, the rotating shaft supporting frame 3 comprises a bearing support 31 and a bearing 32, the bearing support 31 is provided with a mounting hole and a fixing hole communicated with the mounting hole, the fixing hole is arranged around the communicating mounting hole, the bearing 32 is adapted to be sleeved in the mounting hole, a plurality of radial threaded holes are formed in an outer ring of the bearing 32, the threaded holes correspond to the communicating fixing hole, the outer ring of the bearing 32 passes through the fixing hole through a jackscrew to be connected in the threaded holes, and an inner hole of the bearing 32 is adapted to be sleeved (connected in an interference fit manner) on the first rotating shaft 11 and the second rotating shaft 12. The rotating shaft supporting frame 3 has a simple structure, and the first rotating shaft 11 and the second rotating shaft 12 are rotatably connected to the supporting frame through the bearing 32, so that the first rotating shaft 11 and the second rotating shaft 12 can be radially limited, and a supporting effect is achieved.

As shown in fig. 2 to 4, in an embodiment, the device further includes a sling guide seat 5, where the sling guide seat 5 is disposed on a sagging section of the sling 21 and is used for vertically correcting the direction of the sling 21, so that the situation that the sling 21 is too hard and the like cannot sag in a vertical direction after winding the winding drum 2 or the fixed steering pulley 4, and the sling 21 can be attached to the fixed steering pulley 4 when winding the fixed steering pulley 4, thereby avoiding drop prevention.

In one embodiment, as shown in fig. 5 to 7, 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 risers 511, the two risers 511 are spaced apart from each other and parallel to the risers 21 (the hanging sections), the two risers 511 are respectively connected with the first rollers 52 with rotation axes (dashed lines in fig. 5) parallel to the width direction of the slings 21 in a rotating manner, the slings 21 pass through the two risers 511 and are clamped and limited by the two first rollers 52 in a rolling and abutting manner, the slings 21 are limited in the thickness direction of the slings 21, the two risers 511 are respectively rotated with the second rollers 53 with rotation axes parallel to the thickness direction of the slings 21 at two sides of the width direction of the slings 21, the second rollers 53 at two sides of the risers 511 are positioned at two sides of the width direction of the slings 21, and the circumferential outer sides of the second rollers 53 can be in rolling contact with the thickness surface of the slings 21 in a rolling manner, so as to limit the slings 21 in the width direction. Preferably, two vertically arranged second rollers 53 are provided on the side of the riser 511, i.e. the sling 21 is limited in the width direction by four second rollers 53. The hanging strip 21 is limited in the width and thickness directions by the plurality of first rollers 52 and the plurality of second rollers 53, and can be lifted and moved in the longitudinal direction.

In a certain embodiment, the output shaft of the driving device 1 is engaged with the first rotating shaft 11 and the second rotating shaft 12 positioned at two sides of the output shaft of the driving device 1 through a key tooth structure to realize synchronous transmission connection, and the key tooth structures of the first rotating shaft 11 and the second rotating shaft 12 are identical, so that the rotating speeds are identical. In a specific embodiment, the output shaft of the driving device 1 is provided with driving key teeth, the end parts of the first rotating shaft 11 and the second rotating shaft 12 are provided with driven key teeth which are meshed with the driving key teeth, and the first rotating shaft 11 and the second rotating shaft 12 are oppositely meshed with the two sides of the driving key teeth of the output shaft through the driven key teeth to realize synchronous transmission connection. The connection between the winding drum 2 and the first rotating shaft 11 and the second rotating shaft 12 can also adopt a key tooth structure to synchronously rotate, as shown in fig. 11, the winding drum 2 is sleeved on the first rotating shaft 11 and the second rotating shaft 12, a groove is arranged on an inner hole of the winding drum 2, and transmission protrusions (i.e. key teeth) inserted into the grooves are arranged on the first rotating shaft 11 and the second rotating shaft 12. When the rotation directions of the first rotation shaft 11 and the second rotation shaft 12 are opposite, the winding direction of the sling 21 on the winding drum 2 can be changed, so that the winding drum 2 on the first rotation shaft 11 and the second rotation shaft 12 synchronously receive and release the sling 21.

In one embodiment, as shown in fig. 4, the driving device 1 adopts a hollow shaft type motor, an output shaft of the hollow shaft type motor is an output hollow shaft, and the first rotating shaft 11 and the second rotating shaft 12 are respectively sleeved in the output hollow shaft and are in synchronous transmission connection with the hollow output shaft through a key tooth structure, so that the first rotating shaft 11 and the second rotating shaft 12 are coaxially arranged and have the same steering direction, the effective contact surface of key teeth of the output hollow shaft can be increased, and meanwhile, the first rotating shaft 11 and the second rotating shaft 12 are conveniently connected. In order to increase the stability and the power of the device for hoisting, a hollow shaft type gear motor is preferably used as the driving device 1, the rotation speed of the output hollow shaft is controlled more slowly and accurately, and the hoisting load is larger.

The hanging strip 21 comprises, but is not limited to, a belt, which is selected as the hanging strip 21, has certain toughness, is wear-resistant, and is convenient to curl and store while ensuring strength.

As shown in fig. 1-2, the device is preferably provided with four drums 2 equally arranged on a first rotating shaft 11 and a second rotating shaft 12, hanging strips 21 of the two drums 2 sleeved on the first rotating shaft 11 are pulled out to hang around corresponding steering fixed pulleys 4 along two sides of the first rotating shaft 11, hanging strips 21 of the two drums 2 sleeved on the second rotating shaft 12 are pulled out to hang around corresponding steering fixed pulleys 4 along two sides of the second rotating shaft 12, hanging strip guide seats 5 are arranged on hanging strip 21 hanging sections, and object hanging is achieved through four hanging points.

When the lifting device is in actual use, after the bottom ends of the hanging strips 21 are connected with the connection points where lifting objects are dispersed, the driving device 1 is started, an output hollow shaft of the driving device 1 drives the first rotating shaft 11 and the second rotating shaft 12 to synchronously rotate, the winding drum 2 sleeved on the first rotating shaft 11 and the second rotating shaft 12 synchronously rotates, the hanging strips 21 are wound and stored, and the upper part of each hanging strip 21 is wound on the winding drum 2 after being turned by the turning fixed pulley 4, so that the object is stably lifted.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A double-shaft lifting device is characterized by comprising,

The driving device (1), the output shaft of the driving device (1) is connected with a first rotating shaft (11) and a second rotating shaft (12) with the same rotating speed in a synchronous transmission way, and the first rotating shaft (11) and the second rotating shaft (12) are positioned on two opposite sides of the output shaft of the driving device (1);

The winding drum (2) is sleeved on the first rotating shaft (11) and the second rotating shaft (12) respectively, the winding drum (2) is connected with a hanging belt (21), and one end of the hanging belt (21) is fixedly connected to the winding drum (2);

The rotating shaft support frame (3) is rotatably connected to one ends of the first rotating shaft (11) and the second rotating shaft (12) far away from the driving device (1) respectively and supports the first rotating shaft (11) and the second rotating shaft (12).

2. A twin-shaft lifting device as claimed in claim 1, characterized in that a diverting pulley (4) is arranged on one side of the reel (2), and the other end of the sling (21) is attached to the other end and sags after bypassing the diverting pulley (4).

3. A twin-shaft lifting device as claimed in claim 2, characterized in that the first rotation shaft (11) is provided with a plurality of reels (2) with slings (21), and the diverting pulleys (4) are arranged on opposite sides of the first rotation shaft (11) corresponding to the reels (2).

4. A twin-shaft lifting device as defined in claim 2 or 3, wherein the fixed steering pulley (4) comprises a steering bracket (41), a fixed pulley (42) rotatably connected to the steering bracket (41) and a drop-preventing plate (43) fixedly arranged on the steering bracket (41), and a gap for allowing a sling (21) to pass is arranged between the drop-preventing plate (43) and the circumferential side surface of the fixed pulley (42).

5. A twin-shaft lifting device as claimed in claim 1, characterised in that the first (11) and/or second (12) rotary shafts are provided with rotary shaft holders (3) on both sides of the reel (2).

6. The double-shaft lifting device according to claim 1 or 5, wherein the rotating shaft supporting frame (3) comprises a bearing support (31) and a bearing (32) fixedly arranged on the bearing support (31), and the first rotating shaft (11) and the second rotating shaft (12) are respectively inserted into inner holes of the bearing (32).

7. The double-shaft lifting device according to claim 1, further comprising a hanging strip guide seat (5), wherein the hanging strip guide seat (5) is arranged on the hanging strip (21) and is used for vertically correcting the direction of the hanging strip (21).

8. The double-shaft lifting device according to claim 7, wherein the sling guide seat (5) comprises a guide mounting frame (51), and a plurality of first rollers (52) and second rollers (53) which are all rotatably connected to the guide mounting frame (51), the first rollers (52) are positioned on two sides of the sling (21) in the thickness direction and roll to abut against the sling (21), and the second rollers (53) are positioned on two sides of the sling (21) in the width direction and limit the sling (21) in the width direction of the sling (21).

9. A twin-shaft lifting device as defined in claim 1, wherein the output shaft of the driving device (1) is connected with a first rotating shaft (11) and a second rotating shaft (12) which are positioned at two sides of the output shaft of the driving device (1) in a meshed manner through a key tooth structure.

10. The double-shaft lifting device according to claim 9, wherein the driving device (1) comprises a hollow shaft type motor, an output shaft of the hollow shaft type motor is an output hollow shaft, and the first rotating shaft (11) and the second rotating shaft (12) are respectively sleeved in the output hollow shaft and are in synchronous transmission connection with the hollow output shaft through a key tooth structure.