CN219384080U - Multistage elevating gear - Google Patents

Abstract

The utility model discloses a multistage lifting device which comprises a mounting base and a plurality of lifting frames which are sequentially nested inside and outside, wherein a driving device is arranged on the mounting base and is connected with the lifting frames through a transmission structure, and the lifting frames are respectively connected with each other through a synchronous motion structure and can ascend or descend along with the motion of the transmission structure; the lifting frames comprise a back plate and two side plates which are respectively arranged on two sides of the back plate, two ends of the synchronous motion structure are respectively connected with the back plates of the two adjacent lifting frames, the side plates are arranged on the side plates and are connected with the side plates of the adjacent lifting frames through the sliding structures, and the side plates of the lifting frames can move relatively through the sliding structures. The transmission structure enables the lifting operation of the lifting frames under the rotation of the driving device, and the lifting frames are sequentially nested inside and outside, so that the multi-stage lifting device occupies small space.

Description

Multistage elevating gear

Technical Field

The utility model relates to the field of lifting devices, in particular to a multi-stage lifting device.

Background

In industries such as engineering construction, chemical industry, grain, etc., for example, cement, fertilizer, rice, etc., product fields, etc., woven bags are often adopted for bagging to form material bags, and in order to transport the material bags, stacking and loading of the material bags are required, and traditional loading work is mainly completed by manpower, so that the working efficiency is low, the labor force is large and a plurality of health hazards are accompanied by the manpower work, therefore, in order to solve the problems, an automatic product provider provides a lifting device for loading, for example, the Chinese publication number is: the CN 217397919U discloses a material bag lifting stacking device and a loading machine, which adopt a mounting base connected with a loading machine head and are provided with a first driving mechanism; the lifting structure which does not stretch out and draw back is movably connected with the mounting base and can move up and down relative to the mounting base under the action of the first driving mechanism, and the lower end part of the lifting structure is provided with a second driving mechanism; the throwing structure comprises a material bin and an openable bottom plate arranged at the bottom of the material bin, wherein the material bin is connected with the end part of the lifting structure through a second driving mechanism and can rotate perpendicular to the lifting direction under the action of the second driving mechanism. The lifting device for loading is large in occupied space and inconvenient to install in a place with small installation space.

Disclosure of Invention

The utility model provides a multistage lifting device which aims at the defects in the prior art, and comprises a mounting base and a plurality of lifting frames which are sequentially nested inside and outside, wherein a driving device is arranged on the mounting base and is connected with the lifting frames through a transmission structure; the lifting frames comprise a back plate and two side plates which are respectively arranged on two sides of the back plate, two ends of the synchronous motion structure are respectively connected with the back plates of the two adjacent lifting frames, the side plates are arranged on the side plates and are connected with the side plates of the adjacent lifting frames through the sliding structures, and the side plates of the lifting frames can move relatively through the sliding structures.

Preferably, the plurality of lifting frames comprise a first stage lifting frame, a second stage lifting frame and a third stage lifting frame; the first-stage lifting frame comprises a first back plate and two first side plates arranged on two sides of the first back plate, and the first back plate and the first two side plates surround to form a first moving channel for the second lifting frame to move; the second-stage lifting frame comprises a second back plate and two second side plates arranged on two sides of the second back plate, and the second back plate and the second side plates are surrounded to form a second moving channel for the third lifting frame to move; the third-stage lifting frame comprises a third backboard and two third side plates arranged on two sides of the third backboard, and the third side plates are connected with the second side plates in a sliding manner.

Preferably, the synchronous movable structure comprises a first synchronous structure arranged at the end part of the first backboard and a second synchronous structure arranged at one end of the second backboard close to the first synchronous structure, and the first synchronous structure and the second synchronous structure are movably linked; the first synchronous structure comprises a first sheave arranged at the end part of the first backboard and a first transmission chain movably connected with the first sheave, the first transmission chain is respectively connected with the mounting base and the second backboard, and the second-stage lifting frame moves up and down relative to the first-stage lifting frame along with the rotation of the first transmission chain on the first sheave; the second synchronous structure comprises a second sheave and a second transmission chain, the second sheave is arranged at one side of the end part of the second backboard close to the first sheave, the second transmission chain is movably connected to the second sheave, the second transmission chain is respectively connected to the first backboard and the third backboard, and the third-stage lifting frame moves up and down relative to the second-stage lifting frame along with the rotation of the second transmission chain in the second sheave.

Preferably, the mounting base is close to first level crane one side and is equipped with first connecting portion, first connecting portion is connected with first drive chain one end, first backplate is close to second level lift one side and is equipped with second connecting portion, second connecting portion are connected with second drive chain one end, second backplate is close to first level crane one side and is equipped with third connecting portion, third connecting portion are connected with the first drive chain other end, third backplate is close to second level crane one side and is equipped with fourth connecting portion, fourth connecting portion are connected with the second drive chain other end.

Preferably, the first side plate is far away from one side of the first moving channel and is provided with a first guide rail for sliding of the sliding structure, two sides of the first guide rail are provided with first slopes for sliding of the sliding structure, the second side plate is far away from one side of the second moving channel and is provided with a second guide rail for sliding of the sliding structure, two sides of the second guide rail are provided with second slopes for sliding of the sliding structure, one side of the third side plate, which is close to the second side plate, is provided with a third guide rail for sliding of the sliding structure, and two sides of the third guide rail are provided with third slopes for sliding of the sliding structure.

Preferably, the sliding structure comprises a first sliding part, a second sliding part and a third sliding part, wherein the first sliding part is far away from one end of the first sheave, the second sliding part is far away from one end of the second sheave, the third sliding part is arranged on the mounting base and close to two sides of the first side plate, the first sliding part is connected with the second slope in a sliding manner, the second sliding part is connected with the third slope in a sliding manner, and the third sliding part is connected with the first slope in a sliding manner. The first sliding part comprises a first sliding frame and a first fixing plate, the first fixing plate is fixedly connected to one side of the first side plate, which is close to the first moving channel, and the first fixing plate is used for fixing the first sliding frame at the end part of the first side plate; the second sliding part comprises a second sliding frame and a second fixing plate, the second fixing plate is fixedly connected to one side of the second side plate, which is close to the second moving channel, and the second fixing plate is used for fixing the second sliding frame at the end part of the second side plate; the third sliding part comprises a third sliding frame and a third fixing plate, the third fixing plate is fixedly connected to the two sides, far away from the first moving channel, of the mounting base, and the third sliding frame is fixed to the side, far away from the driving device, of the mounting base by the third fixing plate.

Preferably, the first sliding frame comprises a first sliding plate and a first pulley block rotatably connected to the first sliding plate, the first pulley block is in rolling connection with the second slope, a first boss is arranged on the first sliding plate, fourth slopes for installing the first pulley block are arranged on two sides of the first boss, a plurality of first accommodating cavities are arranged on one side, away from the first boss, of the first sliding plate, and the first accommodating cavities are used for installing the first pulley block; the second sliding frame comprises a second sliding plate and a second pulley block rotatably connected to the second sliding plate, the second pulley block is in rolling connection with a third slope, a second boss is arranged on the second sliding plate, fifth slopes for installing the second pulley block are arranged on two sides of the second boss, a plurality of second accommodating cavities are arranged on one side, away from the second boss, of the second sliding plate, and the second accommodating cavities are used for installing the second pulley block; the third sliding frame comprises a third sliding plate and a third pulley block rotatably connected to the third sliding plate, the third pulley block is in rolling connection with the first slope, a third boss is arranged on the third sliding plate, sixth slopes for installing the third pulley block are arranged on two sides of the third boss, a plurality of third accommodating cavities are formed in one side, far away from the third boss, of the third sliding plate, and the third accommodating cavities are used for installing the third pulley block;

preferably, the first pulley block is provided with a first adjusting component connected in a rotating manner, the first adjusting component is installed in the first accommodating cavity and used for adjusting the distance between the first pulley and the second guide rail piece, the second pulley block is provided with a second adjusting component connected in a rotating manner, the second adjusting component is installed in the second accommodating cavity and used for adjusting the distance between the second pulley block and the third guide rail, the third pulley block is provided with a third adjusting component connected in a rotating manner, and the third adjusting component is installed in the third accommodating cavity and used for adjusting the distance between the third pulley block and the first guide rail piece.

Preferably, the first backboard further comprises a first limiting block close to the second connecting part, the first limiting block is used for limiting the second-stage lifting frame to excessively descend, a second limiting block is arranged on one side, close to the second grooved pulley, of the second backboard, and the second limiting block is abutted against the first limiting block when the second-stage lifting frame descends to the limit; the second backplate is close to third level crane one side and is equipped with the third stopper, the third stopper is used for restricting the excessive decline of third level crane, third backplate is close to second level crane one side and is equipped with the fourth stopper, the fourth stopper is contradicted in the third stopper when third level crane descends to the limit.

Preferably, the transmission structure is connected to two ends of the first backboard far away from the first moving channel and is rotationally connected with the driving device, and the lifting frame is lifted along with the rotation of the transmission structure on the driving device.

The utility model discloses a multistage lifting device which comprises a mounting base and a plurality of lifting frames which are sequentially nested inside and outside, wherein a driving device is arranged on the mounting base and is connected with the lifting frames through a transmission structure, and the lifting frames are respectively connected with each other through a synchronous motion structure and can ascend or descend along with the motion of the transmission structure; the lifting frames comprise a back plate and two side plates which are respectively arranged on two sides of the back plate, two ends of the synchronous motion structure are respectively connected with the back plates of the two adjacent lifting frames, the side plates are arranged on the side plates and are connected with the side plates of the adjacent lifting frames through the sliding structures, and the side plates of the lifting frames can move relatively through the sliding structures. The transmission structure can rotate under the action of the driving device, and meanwhile, the transmission structure can drive the lifting frames to simultaneously lift under the connection of the synchronous motion structure, and the lifting frames are sequentially nested inside and outside the lifting frames, so that the lifting device occupies a small space.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is an overall structure diagram of a multi-stage lifting device according to an embodiment of the present utility model.

Fig. 2 is a block diagram of a multi-stage lifting device according to an embodiment of the present utility model.

Fig. 3 is a structural diagram of a back plate of a multi-stage lifting device according to an embodiment of the present utility model.

Fig. 4 is a block diagram of a sliding portion in a multi-stage lifting device according to an embodiment of the present utility model.

Fig. 5 is a structural view of a sliding portion according to an embodiment of the present utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

As shown in fig. 1-2, this embodiment discloses a multi-stage lifting device, which comprises a plurality of lifting frames 1 and a mounting base 2 which are nested inside and outside in sequence, wherein a driving device 3 is arranged on the mounting base 2, the driving device 3 is connected with the lifting frames 1 through a transmission structure 21, and the lifting frames 1 are respectively connected with each other through a synchronous movement structure 22 and can simultaneously ascend or descend along with the movement of the transmission structure 21; the lifting frame 1 comprises a back plate 11 and two side plates 12 respectively arranged on two sides of the back plate 11, two ends of the synchronous motion structure 22 are respectively connected with the back plates 11 of two adjacent lifting frames 1, the side plates 12 are arranged on a sliding structure 13, and the lifting frame side plates 12 are connected with the adjacent lifting frame side plates 12 through the sliding structure 13 and can move relatively through the sliding structure 13. The driving device is fixedly connected to the mounting base, the transmission structure can enable the lifting frame to conduct a plurality of lifting operations relative to the mounting base along with transmission of the driving device, the synchronous movement structure is used for connecting the lifting frames, the synchronous movement structure can conduct lifting operations on the lifting frames simultaneously when the transmission structure rotates, and the lifting frames can move relatively when in lifting operation.

As shown in fig. 2, in the present embodiment, the plurality of lifters 1 includes a first stage lifter 14, a second stage lifter 15, and a third stage lifter 16; the first stage lifting frame 14 comprises a first back plate 141 and two first side plates 142 installed at two sides of the first back plate 141, and the first back plate 141 and the first side plates 142 form a first moving channel 143 for moving the second lifting frame 15; the second stage lifting frame 15 includes a second back plate 151 and two second side plates 152 mounted on two sides of the second back plate 151, and the second back plate 151 and the second side plates 152 form a second moving channel 153 around which the third lifting frame 16 moves; the third stage lifting frame 16 includes a third back plate 161 and two third side plates 162 mounted on two sides of the third back plate 161, and the third side plates 162 are slidably connected to the second side plates 152. The two first side plates are symmetrically arranged on two sides of the first backboard and form a first moving channel with the first backboard in a surrounding mode, the second-stage lifting frame carries out lifting operation relative to the first-stage lifting frame in the first moving channel, the two second side plates are symmetrically arranged on two sides of the second backboard and form a second moving channel with the second backboard in a surrounding mode, the third-stage lifting frame carries out lifting operation relative to the second-stage lifting frame in the second moving channel, the first side plates are in sliding connection with the mounting base, the second side plates are in sliding connection with the first side plates, the third side plates are in sliding connection with the second side plates, the third-stage lifting frames are connected with each other through the synchronous moving structure, and when the transmission structure rotates, the synchronous moving structure drives the third-stage lifting frames to simultaneously carry out lifting operation.

As shown in fig. 2, in the present embodiment, the synchronization activity structure 22 includes a first synchronization structure 221 installed at an end of the first back plate 141, and a second synchronization structure 222 installed at an end of the second back plate 151 near the first synchronization structure 221, where the first synchronization structure 221 and the second synchronization structure 222 are movably linked; the first synchronization structure 221 includes a first sheave 2211 mounted at an end of the first back plate 141, and a first driving chain 2212 movably connected to the first sheave 2211, the first driving chain 2212 is respectively connected to the mounting base 2 and the second back plate 151, and the second stage lifting 15 frame moves up and down relative to the first stage lifting frame 14 along with the first driving chain 2212 moving on the first sheave 2211; the second synchronization structure 222 includes a second sheave 2221 mounted at the end of the second back plate 151 and near the first sheave 2211, and a second driving chain 2222 movably connected to the second sheave 2221, the second driving chain 2222 is connected to the first back plate 141 and the third back plate 161, respectively, and the third stage lifting frame 16 moves up and down relative to the second stage lifting frame 15 along with the rotation of the second driving chain 2222 in the second sheave 2221. The first synchronous structure is that two identical structures are installed on two sides of the first backboard, which is close to two first side plates, the second synchronous structure is that two identical structures are installed on two sides of the second backboard, which is close to the second side plates, and the first transmission chain is rotationally connected to the first grooved pulley, two ends of the first transmission chain are respectively connected to one side of the installation base and one side of the second backboard, which is close to the first-stage lifting frame, so that the second-stage lifting frame is lifted along with the first transmission chain when the first backboard is moved up, the second transmission chain is rotationally connected to the second grooved pulley, two ends of the second transmission chain are respectively connected to one side of the first backboard, which is close to the second-stage lifting frame, and one side of the third backboard is close to the second-stage lifting frame, so that the second-stage lifting frame is lifted along with the second transmission chain when the third-stage lifting frame is moved up.

As shown in fig. 2-3, in the present utility model, a first connection portion 23 is disposed on a side of the mounting base 2 near the first stage lifting frame 14, the first connection portion 23 is connected to one end of the first transmission chain 2212, a second connection portion 1411 is disposed on a side of the first back plate 141 near the second stage lifting frame 15, the second connection portion 1411 is connected to one end of the second transmission chain 2222, a third connection portion 1511 is disposed on a side of the second back plate 151 near the first stage lifting frame 14, the third connection portion 1511 is connected to the other end of the first transmission chain 2212, a fourth connection portion 1611 is disposed on a side of the third back plate 161 near the second stage lifting frame 15, and the fourth connection portion 1611 is connected to the other end of the second transmission chain 2222. Wherein first link is close to mounting base lower extreme portion, second connecting portion installs the one end of keeping away from first sheave, third connecting portion is being close to second sheave one end, fourth connecting portion is also being close to second sheave one end, first drive chain one end is connected in first connecting portion, the other end is connected in third connecting portion, second drive chain one end is connected in second connecting portion, the other end is connected in fourth connecting portion, the mounted position of this kind of connecting portion makes the descending distance increase of crane when going up and down, the connected mode of its drive chain makes a plurality of lifters can carry out the lift operation simultaneously with a plurality of lifters when going up and down, the drive arrangement who has reduced this lifter reduces the energy consumption simultaneously.

As shown in fig. 2, in this embodiment, a first guide rail 1421 for sliding the sliding structure 13 is disposed on a side of the first side plate 142 away from the first moving channel 143, a first slope 14211 for sliding the sliding structure 13 is disposed on two sides of the first guide rail 1421, a second guide rail 1521 for sliding the sliding structure 13 is disposed on a side of the second side plate 152 away from the second moving channel 153, a second slope 15211 for sliding the sliding structure 13 is disposed on two sides of the second guide rail 1521, a third guide rail 1621 for sliding the sliding structure 13 is disposed on a side of the third side plate 162 close to the second side plate 152, and a third slope 16211 for sliding the sliding structure 13 is disposed on two sides of the third guide rail 1621. The first guide rails are arranged on the two first side plates in parallel, the first guide rails are fixedly connected to one side of the first side plates, which is far away from the first moving channel, the first slope is arranged on two side surfaces of the first guide rails, the second guide rails are arranged on the two second side plates in parallel, the second guide rails are fixedly connected to one side of the second side plates, which is far away from the second moving channel, the second slope is arranged on two side surfaces of the second guide rails, the third guide rails are arranged on two third side plates in parallel, the third guide rails are fixedly connected to one side of the third side plates, which is close to the second side plates, the third slope is arranged on two side surfaces of the third guide rails, the sliding structure is connected to the first slope, the second slope and the third slope in a rolling manner, so that a plurality of lifting frames are connected stably when in lifting operation, and derailment of the lifting frames is prevented.

As shown in fig. 4, in the present embodiment, the sliding structure 13 includes a first sliding portion 131 of the first side plate 142 at an end far from the first sheave 2211, a second sliding portion 132 of the second side plate 152 at an end far from the second sheave 2221, and third sliding portions 133 mounted on both sides of the mounting base 2 near the first side plate 142, the first sliding portion 131 is slidably connected to the second slope 15211, the second sliding portion 132 is slidably connected to the third slope 16211, and the third sliding portion 133 is slidably connected to the first slope 14211. The first sliding part 131 includes a first sliding frame 1311 and a first fixing plate 1312, the first fixing plate 1312 is fixedly connected to the first side plate 142 near the first moving channel 143, and the first fixing plate 1312 fixes the first sliding frame 1311 to an end of the first side plate 142; the second sliding portion 132 includes a second sliding frame 1321 and a second fixing plate 1322, the second fixing plate 1322 is fixedly connected to the second side plate 152 near the second moving channel 153, and the second fixing plate 1322 fixes the second sliding frame 1321 to an end of the second side plate 152; the third sliding portion 133 includes a third sliding frame 1331 and a third fixing plate 1332, the third fixing plate 1332 is fixedly connected to two sides of the mounting base 2 away from the first moving channel 143, and the third fixing plate 1332 fixes the third sliding frame 1331 on one side of the mounting base 2 away from the driving device 3. In this embodiment, the first sliding portions, the second sliding portions and the third sliding portions are identical in structure, the first sliding structures are identified in the drawing, wherein the first sliding portions are two identical in structure, and are oppositely arranged at the ends of the two first side plates and at the side far from the first sheave, the second sliding portions are two identical in structure, and are oppositely arranged at the ends of the two second side plates and at the side far from the second sheave, the third sliding portions are two identical in structure, and are oppositely arranged at the mounting base near the two sides of the two first guide rails, wherein the first fixing plates are three identical in structure, and the three first fixing plates are arranged in parallel at the ends of the first side plates, and the three first fixing plates are three identical in structure, and the three second fixing plates are arranged in parallel at the ends of the second moving channels, and the two second sliding plates are fixed at the ends of the second side plates, so that the first sliding plates and the second sliding plates are stably connected at the ends of the first side plates and the second side plates.

As shown in fig. 4 to 5, in this embodiment, the first sliding frame 1311 includes a first sliding plate 13111 and a first pulley block 13112 rotatably connected to the first sliding plate 13111, the first pulley block 13112 is connected to the second slope 15211 in a rolling manner, a first boss 13113 is disposed on the first sliding plate 13111, fourth slopes 13114 for mounting the first pulley block 13112 are disposed on two sides of the first boss 13113, a plurality of first accommodating cavities 13115 are disposed on a side, away from the first boss 13113, of the first sliding plate 13111, and the first accommodating cavities 13115 are used for mounting the first pulley block 13112; the second sliding frame 1321 includes a second sliding plate 13211 and a second pulley block 13212 rotatably connected to the second sliding plate 13211, the second pulley block 13212 is rotatably connected to the third slope 16211, a second boss 13213 is disposed on the second sliding plate 13211, fifth slopes 13214 for mounting the second pulley block 13212 are disposed on two sides of the second boss 13213, a plurality of second accommodating chambers 13215 are disposed on a side of the second sliding plate 13211 away from the second boss 13213, and the second accommodating chambers 13215 are for mounting the second pulley block 13212; the third sliding frame 1331 includes a third sliding plate 13311 and a third pulley block 13312 rotatably connected to the third sliding plate 13311, the third pulley block 13312 is connected to the first slope 14211 in a rolling manner, a third boss 13313 is disposed on the third sliding plate 13311, sixth slopes 13314 for mounting the third pulley block 13312 are disposed on two sides of the third boss 13313, a plurality of third accommodating cavities 13315 are disposed on one side, far from the third boss 13313, of the third sliding plate 13311, and the third accommodating cavities 13315 are used for mounting the third pulley block 13312. The first sliding plate comprises two pulleys which are identical in structure and are fixedly connected with each other, the first pulley blocks which are rotationally connected to the first sliding plate are also two identical in structure, each group of the first pulley blocks is provided with two pulleys which are respectively arranged on two sides of the first boss, the first pulley blocks are rotationally connected to the first boss, the second sliding plate comprises two pulleys which are identical in structure and are fixedly connected with each other, the second pulley blocks which are rotationally connected to the second sliding plate are also two identical in structure, each group of the second pulley blocks is respectively arranged on two sides of the second boss, the second pulley blocks are rotationally connected to the second boss, the third sliding plate comprises two pulleys which are identical in structure and are fixedly connected with each other, the third pulley blocks which are rotationally connected to the third sliding plate are also two identical in structure, each group of the second pulley blocks are respectively arranged on two sides of the third boss, and the second pulley blocks are rotationally connected to the third boss.

As shown in fig. 5, in this embodiment, the first pulley block 13112 is provided with a first adjusting component 13116 that is rotatably connected, the first adjusting component 13116 is installed in the first accommodating cavity 13115 and is used for adjusting the distance between the first pulley block 13112 and the second rail 1521, the second pulley block 13212 is provided with a second adjusting component 13216 that is rotatably connected, the second adjusting component 13216 is installed in the second accommodating cavity 13215 and is used for adjusting the distance between the second pulley block 13212 and the third rail 1621, the third pulley block 13312 is provided with a third adjusting component 13316 that is rotatably connected, and the third adjusting component 13316 is installed in the third accommodating cavity 13315 and is used for adjusting the distance between the third pulley block 13312 and the first rail 1421. In this embodiment, first assembly pulley, second assembly pulley and third assembly pulley structure are unanimous, the drawing marks first assembly pulley, wherein first assembly pulley one end is the first pulley of rotating connection on first boss, the other end is for placing in first holding chamber and rotating the first adjusting part of connecting on first pulley, its first holding chamber is two side by side, one side that first adjusting part was connected to first holding chamber is a slant straight face, the opposite side is the arc inclined plane, second assembly pulley one end is the second pulley of rotating connection on the second boss, the other end is for placing in the second holding chamber and rotating the second adjusting part of connecting on the second pulley, its second holding chamber is two side by side, one side that second adjusting part was connected to the second holding chamber is a slant straight face, the opposite side is the arc inclined plane, third assembly pulley one end is the third pulley of rotating connection on the third boss, the other end is the third adjusting part of placing in the third holding chamber and rotating the third adjusting part of connecting on the third pulley, its third holding chamber is two side by side of side, one side that third holding chamber is connected to third adjusting part is the second pulley, the second adjusting part is the slant face of rotating connection, the second adjusting part is the first inclined plane of each side and the guide rail is the straight face of each side of rolling, the guide rail is stable shape between each guide rail, each guide rail is guaranteed to roll between each side, each guide rail is stable.

As shown in fig. 2 to 3, in this embodiment, the first back plate 141 further includes a first limiting block 1412 adjacent to the second connecting portion 1411, the first limiting block 1412 is used for limiting the second stage lifting frame 15 from excessively descending, a second limiting block 1512 is disposed on a side of the second back plate 151 adjacent to the second sheave 2221, and the second limiting block 1512 abuts against the first limiting block 1412 when the second stage lifting frame 15 descends to the limit; the second back plate 151 is equipped with the third stopper 1513 near third stage crane 16 one side, the third stopper 1513 is used for restricting the excessive decline of third stage crane 16, third back plate 161 is equipped with the fourth stopper 1612 near second stage crane 15 one side, the fourth stopper 1612 is contradicted in third stopper 1513 when third stage crane 16 descends to the limit. The first limiting block and the second limiting block are in interference when the second-stage lifting frame descends, the third limiting block and the fourth limiting block are in interference when the third-stage lifting frame descends, the second-stage lifting frame and the third-stage lifting frame are prevented from excessively descending when the third-stage lifting frame descends, and the first transmission chain and the second transmission chain are enabled to be overlarge in stress.

In this embodiment, as shown in fig. 1, the transmission structure 21 is connected to two ends of the first back plate 141 away from the first moving channel 143, and is rotatably connected to the driving device 3, and the lifting frame 1 is lifted along with the rotation of the transmission structure 21 on the driving device 3. The transmission structure is fixedly connected to the upper end and the lower end of the first backboard, is close to one side of the mounting base, is connected to the driving device in a rotating mode, and drives the lifting frame to lift along with the rotation of the driving device.

In the multistage lifting frame device disclosed in the embodiment, the transmission structure enables the lifting frames to lift under the rotation of the driving device, and the lifting frames are sequentially nested inside and outside the lifting frames, so that the multistage lifting device occupies a small space.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A multi-stage lifting device, characterized in that:

the lifting device comprises a mounting base and a plurality of lifting frames which are sequentially nested inside and outside, wherein a driving device is arranged on the mounting base and is connected with the lifting frames through a transmission structure, and the lifting frames are respectively connected with each other through a synchronous motion structure and can simultaneously ascend or descend along with the motion of the transmission structure;

the lifting frames comprise a back plate and two side plates which are respectively arranged on two sides of the back plate, two ends of the synchronous motion structure are respectively connected with the back plates of the two adjacent lifting frames, the side plates are arranged on the side plates and are connected with the side plates of the adjacent lifting frames through the sliding structures, and the side plates of the lifting frames can move relatively through the sliding structures.

2. The multi-stage lifting device of claim 1, wherein: the plurality of lifting frames comprise a first-stage lifting frame, a second-stage lifting frame and a third-stage lifting frame;

the first-stage lifting frame comprises a first back plate and two first side plates arranged on two sides of the first back plate, and the first back plate and the first two side plates surround to form a first moving channel for the second lifting frame to move;

the second-stage lifting frame comprises a second back plate and two second side plates arranged on two sides of the second back plate, and the second back plate and the second side plates are surrounded to form a second moving channel for the third lifting frame to move;

the third-stage lifting frame comprises a third backboard and two third side plates arranged on two sides of the third backboard, and the third side plates are connected with the second side plates in a sliding manner.

3. The multi-stage lifting device of claim 2, wherein: the synchronous motion structure comprises a first synchronous structure arranged at the end part of the first backboard and a second synchronous structure arranged at one end of the second backboard close to the first synchronous structure, and the first synchronous structure and the second synchronous structure are movably linked;

the first synchronous structure comprises a first sheave arranged at the end part of the first backboard and a first transmission chain movably connected with the first sheave, the first transmission chain is respectively connected with the mounting base and the second backboard, and the second-stage lifting frame moves up and down relative to the first-stage lifting frame along with the rotation of the first transmission chain on the first sheave;

the second synchronous structure comprises a second sheave and a second transmission chain, the second sheave is arranged at one side of the end part of the second backboard close to the first sheave, the second transmission chain is movably connected to the second sheave, the second transmission chain is respectively connected to the first backboard and the third backboard, and the third-stage lifting frame moves up and down relative to the second-stage lifting frame along with the rotation of the second transmission chain in the second sheave.

4. A multi-stage lifting device according to claim 3, wherein; the mounting base is close to first level crane one side and is equipped with first connecting portion, first connecting portion is connected with first drive chain one end, first backplate is close to second level lift one side and is equipped with second connecting portion, second connecting portion are connected with second drive chain one end, second backplate is close to first level crane one side and is equipped with third connecting portion, third connecting portion are connected with the first drive chain other end, third backplate is close to second level crane one side and is equipped with fourth connecting portion, fourth connecting portion are connected with the second drive chain other end.

5. The multi-stage lift device of claim 4 wherein;

the first side plate is far away from first movable channel one side is equipped with the gliding first guide rail of confession sliding structure, just first guide rail both sides are equipped with the confession the gliding first slope of sliding structure, the second side plate is kept away from second movable channel one side is equipped with the gliding second guide rail of confession sliding structure, just the second guide rail both sides are equipped with the confession the gliding second slope of sliding structure, third side plate is close to second side plate one side and is equipped with the gliding third guide rail of confession sliding structure, just third guide rail both sides are equipped with the confession the gliding third slope of sliding structure.

6. The multi-stage lifting device of claim 5, wherein:

the sliding structure comprises a first sliding part, a second sliding part and a third sliding part, wherein the first sliding part is far away from one end of the first sheave, the second sliding part is far away from one end of the second sheave, the third sliding part is arranged on the mounting base and close to two sides of the first side plate, the first sliding part is connected with the second slope in a sliding manner, the second sliding part is connected with the third slope in a sliding manner, and the third sliding part is connected with the first slope in a sliding manner;

the first sliding part comprises a first sliding frame and a first fixing plate, the first fixing plate is fixedly connected to one side of the first side plate, which is close to the first moving channel, and the first fixing plate is used for fixing the first sliding frame at the end part of the first side plate;

the second sliding part comprises a second sliding frame and a second fixing plate, the second fixing plate is fixedly connected to one side of the second side plate, which is close to the second moving channel, and the second fixing plate is used for fixing the second sliding frame at the end part of the second side plate;

the third sliding part comprises a third sliding frame and a third fixing plate, the third fixing plate is fixedly connected to the two sides, far away from the first moving channel, of the mounting base, and the third sliding frame is fixed to the side, far away from the driving device, of the mounting base by the third fixing plate.

7. The multi-stage lifting device of claim 6, wherein:

the first sliding frame comprises a first sliding plate and a first pulley block rotatably connected to the first sliding plate, the first pulley block is in rolling connection with a second slope, a first boss is arranged on the first sliding plate, fourth slopes for installing the first pulley block are arranged on two sides of the first boss, a plurality of first accommodating cavities are formed in one side, far away from the first boss, of the first sliding plate, and the first accommodating cavities are used for installing the first pulley block;

the second sliding frame comprises a second sliding plate and a second pulley block rotatably connected to the second sliding plate, the second pulley block is in rolling connection with a third slope, a second boss is arranged on the second sliding plate, fifth slopes for installing the second pulley block are arranged on two sides of the second boss, a plurality of second accommodating cavities are arranged on one side, away from the second boss, of the second sliding plate, and the second accommodating cavities are used for installing the second pulley block;

the third sliding frame comprises a third sliding plate and a third pulley block rotationally connected to the third sliding plate, the third pulley block is in rolling connection with the first slope, a third boss is arranged on the third sliding plate, sixth slopes for installing the third pulley block are arranged on two sides of the third boss, a plurality of third accommodating cavities are formed in one side, away from the third boss, of the third sliding plate, and the third accommodating cavities are used for installing the third pulley block.

8. The multi-stage lifting device of claim 7, wherein:

be equipped with the first adjusting part that rotates to be connected on the first assembly pulley, first adjusting part install in first holding the chamber to be used for adjusting the distance of first pulley and second guide rail spare, be equipped with the second adjusting part that rotates to be connected on the second assembly pulley, the second adjusting part install in the second holds the chamber, and be used for adjusting the distance of second assembly pulley and third guide rail, be equipped with the third adjusting part that rotates to be connected on the third assembly pulley, the third adjusting part install in the third holds the chamber, and be used for adjusting the distance of third assembly pulley and first guide rail spare.

9. The multi-stage lifting device of claim 8, wherein;

the first backboard further comprises a first limiting block close to the second connecting part, the first limiting block is used for limiting the second-stage lifting frame to excessively descend, a second limiting block is arranged on one side, close to the second grooved pulley, of the second backboard, and the second limiting block is abutted against the first limiting block when the second-stage lifting frame descends to the limit;

the second backplate is close to third level crane one side and is equipped with the third stopper, the third stopper is used for restricting the excessive decline of third level crane, third backplate is close to second level crane one side and is equipped with the fourth stopper, the fourth stopper is contradicted in the third stopper when third level crane descends to the limit.

10. The multi-stage lifting device of claim 9, wherein; the transmission structure is connected to the two ends of the first backboard far away from the first moving channel and is rotationally connected with the driving device, and the lifting frame is lifted along with the rotation of the transmission structure on the driving device.