CN115196555B - Lifting mechanism and stacker - Google Patents

Lifting mechanism and stacker Download PDF

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Publication number
CN115196555B
CN115196555B CN202210970500.2A CN202210970500A CN115196555B CN 115196555 B CN115196555 B CN 115196555B CN 202210970500 A CN202210970500 A CN 202210970500A CN 115196555 B CN115196555 B CN 115196555B
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CN
China
Prior art keywords
lifting
friction block
sliding
upright
lifting mechanism
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CN202210970500.2A
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Chinese (zh)
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CN115196555A (en
Inventor
张金虎
张亚方
张训栋
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Beijing Jingdong Qianshi Technology Co Ltd
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Beijing Jingdong Qianshi Technology Co Ltd
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Priority to CN202210970500.2A priority Critical patent/CN115196555B/en
Publication of CN115196555A publication Critical patent/CN115196555A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075Constructional features or details
    • B66F9/07509Braking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/003Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Civil Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The embodiment of the invention relates to the technical field of warehouse logistics, and discloses a lifting mechanism and a stacker. The upright post is arranged on the side surface of the lifting table; the fixed clamp assembly is fixedly connected to the lifting table and is arranged on the first side surface of the upright post; the movable clamp assembly is connected to the lifting table and is arranged on the second side surface of the upright post; the driving assembly is used for driving the movable clamp assembly to be in friction contact with the second side surface when the lifting platform falls down, and enabling the movable clamp assembly to push the lifting platform to twist until the fixed clamp assembly is in friction contact with the first side surface. Under the combined action of the fixed clamp assembly and the movable clamp assembly, the anti-falling effect can be achieved, the friction force between the fixed clamp/the movable clamp assembly and the upright post can be obviously increased, the time from falling to stopping of the lifting platform is effectively shortened, the lifting platform is stopped in time, and the safety is ensured.

Description

Lifting mechanism and stacker
Technical Field
The embodiment of the invention relates to the technical field of warehouse logistics transportation, in particular to a lifting mechanism and a stacker.
Background
The stacker is a special crane which adopts a fork or a string rod as an object taking device, and is used for grabbing, carrying and stacking at a warehouse, a workshop and the like or taking and placing unit cargoes from a high-rise goods shelf. In the lifting process of the lifting platform of the stacker, the lifting platform can rapidly drop due to the fact that the lifting rope is broken and/or the motor stalls.
In the related art, a fall prevention structure is generally provided for preventing the lifting platform from falling in time. Generally, common fall protection structures include mechanical hard stop, cushioned, electrically controlled, friction, and the like. The mechanical hard limit is that the mechanical structure blocks the movement mechanism after lifting, so that the movement mechanism cannot fall down. The shock absorbing is to absorb the impact by a shock absorber, a spring, or the like. The electric control type is limited by adopting motor braking, a hydraulic valve, a pneumatic valve and the like. Friction is the use of friction to reduce the drop down speed until stopped.
Currently, a friction type anti-falling structure of a stacker is generally adopted. However, the anti-falling structure of the stacker in the related art has poor friction braking effect, thereby affecting the timely stopping of the lifting platform.
Disclosure of Invention
The embodiment of the invention provides a lifting mechanism and a stacker, which solve the problem of poor friction braking effect in the related technology under the combined action of a fixed clamp assembly and a movable clamp assembly.
The lifting mechanism comprises a lifting table, a stand column, a fixed clamp assembly, a movable clamp assembly and a driving assembly, wherein the stand column is arranged on the side surface of the lifting table; the fixed clamp assembly is fixedly connected to the lifting table and is arranged on the first side surface of the upright post; the movable clamp assembly is connected to the lifting table and is arranged on the second side surface of the upright post; and the driving assembly is used for driving the movable clamp assembly to be in friction contact with the second side surface when the lifting platform is falling down, and enabling the movable clamp assembly to push the lifting platform to twist until the fixed clamp assembly is in friction contact with the first side surface.
According to some embodiments of the invention, the second side is opposite to the first side; the lifting mechanism comprises two upright posts which are respectively arranged on two opposite side surfaces of the lifting table;
the lifting mechanism comprises two groups of fixed clamp assemblies and movable clamp assemblies which are correspondingly arranged, and each group of fixed clamp assemblies and movable clamp assemblies are respectively arranged on the first side face and the second side face of the upright post;
along the arrangement direction of the two upright posts, the fixed clamp assembly of one group is correspondingly arranged with the movable clamp assembly of the other group.
According to some embodiments of the invention, the lift table includes a stop plate; the lifting mechanism further comprises:
the lifting rope is used for driving the lifting table to lift; the lifting rope is arranged through the perforation of the baffle plate in a penetrating mode, the driving assembly is connected to one end of the lifting rope and can be stopped by the baffle plate, and therefore the lifting table is suspended at one end of the lifting rope through the driving assembly in a normal state.
According to some embodiments of the invention, the drive assembly comprises:
the pressure receiving piece is provided with a containing groove and a through hole which are communicated with each other, the lifting rope is arranged in the containing groove and the through hole in a penetrating way, and one end of the lifting rope exposed out of the pressure receiving piece is connected with the pressure receiving piece through a limiting piece; one end of the pressure receiving piece is connected with the movable clamp assembly; and
and the elastic piece is arranged in the accommodating groove, one end of the elastic piece is propped against the stop plate, and the other end of the elastic piece is propped against the bottom of the accommodating groove and is used for applying elastic force to the pressed piece in the direction away from the stop plate.
According to some embodiments of the invention, the lifting mechanism further comprises:
the protection switch is connected to the lifting table and used for obtaining a movement signal of the driving assembly; and
and the controller is in signal connection with the protection switch and is used for locking the motor of the lifting mechanism according to the movement signal.
According to some embodiments of the invention, the moveable jaw assembly comprises:
the first installation seat is fixedly connected with the lifting table;
the first friction block is connected to the first mounting seat in a sliding direction in a sliding manner, and the sliding direction is obliquely arranged relative to the extending direction of the length of the upright post; and
and the linkage unit is connected with the first friction block and the driving assembly and is used for driving the first friction block to move upwards and in the direction close to the upright post until the first friction block is in friction contact with the second side surface when the driving assembly works.
According to some embodiments of the invention, the movable jaw assembly further comprises a slider, the first friction block being slidably connected with the slider along the sliding direction by a sliding structure;
the sliding piece is connected to the first mounting seat and is used for extruding the first friction block together with the upright post when the first friction block is in friction contact with the upright post.
According to some embodiments of the invention, the first friction block has a first sliding surface, the slider has a sliding groove, the groove bottom of which forms a second sliding surface;
at least part of the first friction block is slidably arranged in the sliding groove, the first sliding surface and the second sliding surface are parallel to the sliding direction and can be in sliding fit, and when the first friction block is in friction contact with the upright post, the second sliding surface presses the first friction block at least along the direction perpendicular to the upright post.
According to some embodiments of the invention, the sliding structure comprises:
a long strip hole which is arranged on one of the first friction block and the sliding piece and extends along the sliding direction;
the first mounting hole is formed in the other of the first friction block and the sliding piece;
the second mounting hole is arranged on the other one of the first friction block and the sliding piece and is arranged at intervals with the first mounting hole along the sliding direction;
the first pin shaft is arranged in the strip hole and the first mounting hole in a penetrating manner and can move along the extending direction of the strip hole; and
the second pin shaft is arranged in the strip hole and the second mounting hole in a penetrating mode and can move along the extending direction of the strip hole.
According to some embodiments of the invention, in a state that the first friction block is not in friction contact with the upright post, the first pin shaft abuts against one end of the elongated hole, which is close to the upright post.
According to some embodiments of the invention, the slide is movably connected to the first mount;
the movable clamp assembly further comprises a first adjusting unit, wherein the first adjusting unit is connected to the first mounting seat and used for adjusting the position of the sliding piece relative to the first mounting seat along the direction away from or close to the upright post.
According to some embodiments of the invention, the linkage unit comprises:
the swinging piece is hinged to the first mounting seat, and one end of the swinging piece is connected with the driving assembly in a floating mode; and
and one end of the jacking piece is connected with the first friction block, and the other end of the jacking piece is abutted with the other end of the swinging piece.
According to some embodiments of the invention, the lifting mechanism further comprises a reset element connected to the lifting table and the linkage unit for resetting the linkage unit.
According to some embodiments of the invention, the fixation clamp assembly includes:
the second installation seat is fixedly connected with the lifting table;
the second friction block comprises a second body and a second wear-resistant piece, the second body is adjustably connected to the second mounting seat along the direction approaching or separating from the upright post, and the second wear-resistant piece is connected to the second body and is used for being in friction contact with the first side face; and
and the limiting block is connected with the second mounting seat and used for limiting the second wear-resisting piece to move relatively to the second body when the second wear-resisting piece is in friction contact with the first side surface.
The stacker of the embodiment of the invention comprises any lifting mechanism.
One embodiment of the above invention has at least the following advantages or benefits:
according to the lifting mechanism provided by the embodiment of the invention, when the lifting platform falls down, the movable clamp assembly can push the lifting platform to twist by taking the vertical direction as the axis, so that the fixed clamp assembly can be in friction contact with the first side surface. Like this, under the combined action of fixed pincers subassembly and movable pincers subassembly, not only can play the anti-falling effect, can also show the frictional force that increases between fixed pincers/the movable pincers subassembly and the stand, effectively shorten the elevating platform and follow the time of falling down to stopping, make the elevating platform in time stop, ensured the security.
Drawings
Fig. 1 is a schematic perspective view of a lifting platform provided at one side of a column according to an embodiment of the present invention.
Fig. 2 shows a side view of fig. 1.
Fig. 3 shows a top view of fig. 1.
Fig. 4 is a perspective view of the fixed and movable jaw assemblies of fig. 1 after being mounted on a lifting platform.
Fig. 5 shows a front view of the fixed jaw assembly of fig. 1.
Fig. 6 shows a right side view of fig. 5.
Fig. 7 shows a partial enlarged view at X1 in fig. 4.
Fig. 8 is a schematic perspective view of the movable jaw assembly and drive assembly of fig. 1 after installation.
Fig. 9 shows a side view of fig. 8.
Fig. 10 shows a cross-sectional view along A-A in fig. 9.
Fig. 11 shows a schematic diagram of the protection switch of fig. 4.
Fig. 12 shows a partial cross-sectional view of the partial slider of fig. 8 cut away.
Fig. 13 shows a schematic view of a first friction block.
Fig. 14 shows a schematic view of a slider.
Fig. 15 shows a cross-sectional view along B-B in fig. 9.
Wherein reference numerals are as follows:
10. a lifting table; 110. a stop plate; 111. perforating; 20. a column; 210. a first side; 220. a second side; 30. a fixed jaw assembly; 310. a second mounting base; 320. a second friction block; 321. a second body; 322. a second wear member; 323. a second kidney-shaped aperture; 330. a limiting block; 340. a second adjusting unit; 341. a second adjusting lever; 40. a movable clamp assembly; 410. a first mount; 420. a first friction block; 421. a first sliding surface; 422. a first body; 423. a first wear member; 430. a linkage unit; 431. a swinging member; 432. a jacking member; 433. a notch; 440. a slider; 441. a second sliding surface; 442. a chute; 443. a first kidney-shaped aperture; 450. a first adjusting unit; 451. a first adjusting lever; 460. a sliding structure; 461. a slit hole; 462. a first mounting hole; 463. a first pin; 464. a second mounting hole; 465. a second pin; 50. a drive assembly; 510. a pressure receiving member; 511. a receiving groove; 512. a through hole; 513. a variable diameter portion; 520. an elastic member; 530. a gasket; 60. a lifting rope; 610. a wire rope; 620. a pressure head; 70. a protection switch; 71. a mounting frame; 80. a limiting piece; 90. and a reset piece.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Referring to fig. 1 to 4, fig. 1 is a schematic perspective view of a lifting platform 10 according to an embodiment of the present invention disposed on one side of a column 20. Fig. 2 shows a side view of fig. 1. Fig. 3 shows a top view of fig. 1. Fig. 4 is a perspective view showing the fixed jaw assembly 30 and the movable jaw assembly 40 of fig. 1 after being mounted on the elevating platform 10. The lifting mechanism of the embodiment of the invention comprises a lifting platform 10, a stand column 20, a fixed clamp assembly 30, a movable clamp assembly 40 and a driving assembly 50. The upright post 20 is arranged on the side surface of the lifting platform 10, the fixed clamp assembly 30 is fixedly connected to the lifting platform 10 and is arranged on the first side surface 210 of the upright post 20, and the movable clamp assembly 40 is connected to the lifting platform 10 and is arranged on the second side surface 220 of the upright post 20. The driving assembly 50 is used for driving the movable clamp assembly 40 to be in friction contact with the second side surface 220 when the lifting platform 10 is falling down, and enabling the movable clamp assembly 40 to push the lifting platform 10 to twist by taking the vertical direction as an axis until the fixed clamp assembly 30 is in friction contact with the first side surface 210.
It will be understood that the terms "comprising," "including," and "having," and any variations thereof, are intended to cover non-exclusive inclusions in the embodiments of the invention. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
When the lifting platform 10 falls, the driving assembly 50 can drive the movable clamp assembly 40 to be in friction contact with the second side surface 220, and the falling speed of the lifting platform 10 can be reduced through the friction force generated between the movable clamp assembly 40 and the second side surface 220 of the upright post 20. At the same time, the movable clamp assembly 40 can also push the lifting platform 10 to twist by taking the vertical direction as an axis until the fixed clamp assembly 30 is in friction contact with the first side 210. In this way, the fixed jaw assembly 30 and the movable jaw assembly 40 generate friction with the first side 210 and the second side 220 of the upright post 20 respectively, so that the friction between the lifting platform 10 and the upright post 20 is increased, and the larger friction can timely reduce the falling speed of the lifting platform 10 until the lifting platform 10 stops.
Therefore, in the lifting mechanism according to the embodiment of the invention, when the lifting platform 10 falls down, the movable clamp assembly 40 can push the lifting platform 10 to twist around the vertical axis, so that the fixed clamp assembly 30 can also be in frictional contact with the first side 210. Thus, under the combined action of the fixed clamp assembly 30 and the movable clamp assembly 40, not only the anti-falling effect can be achieved, but also the time from falling to stopping of the lifting platform 10 can be effectively shortened, and the safety is ensured.
The first side 210 and the second side 220 of the post 20 are disposed opposite. In other words, the fixed jaw assembly 30 and the movable jaw assembly 40 are disposed at opposite sides of the column 20, respectively. When the fixed jaw assembly 30 contacts the first side 210 and the movable jaw assembly 40 contacts the second side 220, the force applied to the upright post 20 is more uniform due to the opposite arrangement of the first side 210 and the second side 220, so as to ensure the stability of the lifting mechanism.
With continued reference to fig. 3, the lifting mechanism includes two upright posts 20, and the two upright posts 20 are respectively disposed on two opposite sides of the lifting platform 10. The lifting mechanism comprises two groups of fixed jaw assemblies 30 and movable jaw assemblies 40 which are correspondingly arranged, and each group of fixed jaw assemblies 30 and movable jaw assemblies 40 are respectively arranged on a first side surface 210 and a second side surface 220 of the upright post 20.
As shown in fig. 3, the fixed jaw assembly 30 of one set is disposed corresponding to the movable jaw assembly 40 of the other set along the arrangement direction of the two columns 20. Specifically, the movable jaw assembly 40 located in the lower left corner is disposed in correspondence with the fixed jaw assembly 30 located in the lower right corner, and the fixed jaw assembly 30 located in the upper left corner is disposed in correspondence with the movable jaw assembly 40 located in the upper right corner. Two movable jaw assemblies 40 are arranged diagonally and two fixed jaw assemblies 30 are arranged diagonally.
When the two movable jaw assemblies 40 are in frictional contact with the two upright posts 20, respectively, since the two movable jaw assemblies 40 are arranged diagonally, the directions of the reaction forces exerted on the two movable jaw assemblies 40 by the two upright posts 20 are opposite, so that the lifting platform 10 can slightly twist along the center thereof, and finally the two fixed jaw assemblies 30 are in frictional contact with the two upright posts 20, respectively.
As shown in fig. 5 and 6, fig. 5 shows a front view of the fixed jaw assembly 30 of fig. 1. Fig. 6 shows a right side view of fig. 5. The fixed jaw assembly 30 includes a second mount 310, a second friction block 320, and a second adjustment unit 340.
The second mounting base 310 is fixedly connected to the lifting platform 10, for example, by a bolt fixedly connected to an outer side wall surface of the lifting platform 10. The second friction block 320 is connected to the second mount 310 for frictional contact with the first side 210 of the upright 20.
Further, the second friction block 320 is adjustably connected to the second mount 310 in a direction approaching or separating from the column 20. The second adjusting unit 340 is used for adjusting the position of the second friction block 320 relative to the second mounting base 310.
The size of the gap between the second friction block 320 and the first side 210 of the upright 20 can be adjusted by the second adjusting unit 340 so that the gap can meet the design requirement.
As an example, the second friction block 320 is provided with a second kidney-shaped hole 323, and the second kidney-shaped hole 323 extends along a direction perpendicular to the extending direction of the upright post 20. The second friction block 320 and the second mounting seat 310 may be connected by a screw, and the screw is inserted into the second kidney-shaped hole 323.
As an example, the second adjusting unit 340 includes a second adjusting rod 341, and the second adjusting rod 341 is screwed to the second mounting base 310. The axis of the second adjusting rod 341 is perpendicular to the extending direction of the upright post 20, and one end of the second adjusting rod 341 abuts against the second friction block 320.
When the second friction block 320 needs to be adjusted, the second adjusting lever 341 is rotated, so that the second adjusting lever 341 pushes the second friction block 320 to move relative to the second mounting seat 310.
The second friction block 320 includes a second body 321 and a second wear member 322, the second body 321 being adjustably coupled to the second mount 310, the second wear member 322 being detachably coupled to the second body 321 and adapted to be in frictional contact with the first side 210.
The second wear member 322 may be formed from a wear resistant material. The second wear-resistant member 322 is detachably connected to the second body 321, so that the second wear-resistant member 322 can be replaced conveniently.
As an example, the second wear-resistant piece 322 and the second body 321 may be connected by a screw, but not limited thereto.
The fixed jaw assembly 30 further includes a stopper 330 coupled to the second mounting base 310 for restricting relative movement of the second wear member 322 with respect to the second body 321 when the second wear member 322 is in frictional contact with the first side 210.
It will be appreciated that when the second wear member 322 is in frictional contact with the first side 210 of the upright 20, the second wear member 322 will have a tendency to move upwardly along the upright 20 due to the frictional forces generated between the second wear member 322 and the upright 20. If the strength of the connection between the second wear part 322 and the second body 321 is insufficient, a relative movement of the second wear part 322 with respect to the second body 321 may occur. If the second wear-resistant member 322 is connected to the second body 321 by a screw, the relative movement of the second wear-resistant member 322 with respect to the second body 321 may subject the screw to a shearing force, so that the screw is easily broken.
In the present embodiment, the movement of the second wear-resistant member 322 relative to the second body 321 can be limited by the setting of the limiting block 330, so as to avoid affecting the connection stability between the second wear-resistant member 322 and the second body 321.
As shown in fig. 7, fig. 7 is a partially enlarged view at X1 in fig. 4. The lift table 10 includes a stop plate 110. The lifting mechanism further comprises a lifting rope 60, and the lifting rope 60 is used for driving the lifting table 10 to lift. The lifting rope 60 is inserted through the through hole 111 of the stop plate 110, and the driving assembly 50 is connected to one end of the lifting rope 60 and can be stopped by the stop plate 110, so that the lifting platform 10 is suspended at one end of the lifting rope 60 through the driving assembly 50 in a normal state.
Specifically, in a normal state, the driving assembly 50 is connected to one end of the lifting rope 60, and the driving assembly 50 abuts against the stop plate 110 of the lifting platform 10. One end of the lift cord 60 is connected to the stopper plate 110 of the lift table 10 through the driving unit 50, and the lift cord 60 can pull the lift table 10 to lift. It will be appreciated that the weight of the lift table 10 balances the tension of the lift cord 60 such that the lift cord 60 pulls the lift table 10 up and down.
It is understood that the "normal state" refers to a state in which the lift table 10 is normally lifted without breaking the lift cord 60 and without stalling the drive motor.
As shown in fig. 8-10, fig. 8 is a schematic perspective view of the movable jaw assembly 40 and the drive assembly 50 of fig. 1 after installation. Fig. 9 shows a side view of fig. 8. Fig. 10 shows a cross-sectional view along A-A in fig. 9. The driving assembly 50 includes a pressure receiving member 510 and an elastic member 520.
The pressure receiving member 510 has a receiving groove 511 and a through hole 512 that communicate with each other, and the receiving groove 511 and the through hole 512 penetrate through two opposite sides of the pressure receiving member 510 in the vertical direction. The lifting rope 60 is inserted into the accommodating groove 511 and the through hole 512, and one end of the lifting rope 60 exposed out of the compression member 510 is connected with the compression member 510 through a limiting member 80. Through the stopper 80, the lift cord 60 drives the pressure receiving member 510 to move upward.
As described above, since the top of the pressure receiving member 510 abuts against the stopper 110 of the lifting table 10, the lifting table 10 can be pulled to lift by the pressure receiving member 510 when the lifting rope 60 is lifted.
It is understood that the limiting member 80 may be a nut, and the nut is screwed with the lifting rope 60, but is not limited thereto.
As an example, the lifting rope 60 includes a steel wire rope 610 and a pressing head 620, the pressing head 620 is fixedly connected to one end of the steel wire rope 610, the pressing head 620 is disposed through the accommodating groove 511 and the through hole 512 of the pressure receiving member 510, and the limiting member 80 is connected to a portion of the pressing head 620 exposed to the pressure receiving member 510.
The elastic member 520 is disposed in the accommodating groove 511, and one end of the elastic member 520 abuts against the stop plate 110, and the other end abuts against the bottom of the accommodating groove 511, so as to apply an elastic force to the compression member 510 in a direction away from the stop plate 110.
In a normal state, the elastic member 520 is disposed in the accommodating groove 511, and is blocked in the accommodating groove 511 by the stop plate 110 of the lifting platform 10, so that the elastic member 520 is in a compressed state.
When the lift cord 60 breaks and/or the drive motor stalls, the lift table 10 drops rapidly, and the elastic force of the elastic member 520 is released, so that the elastic member 520 applies an elastic force to the pressure receiving member 510 in a direction away from the stopper plate 110.
One end of the pressure receiving member 510 is connected to the movable jaw assembly 40. The pressure receiving member 510 drives the movable jaw assembly 40 into frictional contact with the second side 220 of the upright 20 under the elastic force of the elastic member 520.
It is understood that the elastic member 520 may be a spring, such as a compression spring, but not limited thereto.
A gasket 530 may be further disposed between the elastic member 520 and the stop plate 110, where one end of the elastic member 520 abuts against the stop plate 110 through the gasket 530. By providing the spacer 530, one end of the elastic member 520 is prevented from being inserted into the through hole 111 of the stopper plate 110.
With continued reference to fig. 7, the lift mechanism further includes a protection switch 70 and a controller (not shown), wherein the protection switch 70 is connected to the lift table 10 for obtaining a movement signal of the driving assembly 50. The controller is in signal connection with the protection switch 70 for locking the motor of the lifting mechanism according to the movement signal of the driving assembly 50.
As an example, the protection switch 70 may include a proximity switch, a travel switch, etc., but is not limited thereto.
It will be appreciated that when the lift cord 60 is not broken and the drive motor stalls, the lift table 10 drops rapidly, and the pressure receiving member 510 moves away from the stopper plate 110 due to the elastic force of the elastic member 520. At this time, the protection switch 70 may obtain a movement signal of the pressed member 510, and the controller may control the driving motor band-type brake to lock according to the movement signal, so as to prevent the lifting platform 10 from further falling.
It is understood that the outer periphery of the pressure receiving member 510 has a diameter-changing portion 513. The size of the variable diameter portion 513 is different from the size of the other positions of the pressure receiving member 510. When the pressure receiving member 510 moves in a direction away from the stopper plate 110, the movement signal of the pressure receiving member 510 is more easily obtained by the protection switch 70 through the diameter varying portion 513.
In one embodiment, the reducing portion 513 may be a chamfer, but is not limited thereto.
As shown in fig. 11, fig. 11 is a schematic diagram of the protection switch 70 of fig. 4. The protection switch 70 may be fixedly connected to the elevating platform 10 through a mounting bracket 71.
As shown in fig. 8, 9 and 12, fig. 12 shows a partial sectional view of the slider 440 of fig. 8 cut away. The movable jaw assembly 40 includes a first mount 410, a first friction block 420, a slider 440, and a linkage unit 430.
The first mounting base 410 is fixedly connected to the lifting platform 10, for example, the first mounting base 410 is fixedly connected to the lifting platform 10 through screws. The first friction block 420 is movably coupled to the first mount 410. The sliding member 440 is coupled to the first mount 410 for co-extruding the first friction block 420 with the upright 20 when the first friction block 420 is in frictional contact with the upright 20. The first friction block 420 is slidably coupled with the slider 440 in a sliding direction by a sliding structure 460. The linkage unit 430 is connected to the first friction block 420 and the driving assembly 50, and is configured to drive the first friction block 420 to move toward the column 20 when the driving assembly 50 is operated until the first friction block 420 is in frictional contact with the second side 220.
The first friction block 420 is slidably connected to the first mounting seat 410 along a sliding direction, and the sliding direction is inclined with respect to the extending direction of the length of the upright 20, so that the linkage unit 430 drives the first friction block 420 to move upwards and in a direction close to the upright 20.
It will be appreciated that when the first friction block 420 slides obliquely upward in the sliding direction, the first friction block 420 is in frictional contact with the second side 220 of the upright 20, which friction serves to reduce the falling speed of the lift table 10. At the same time, the friction force can cause the first friction block 420 to continue to slide along the sliding direction, and since the sliding direction is inclined upwards, the first friction block 420 is pressed by the sliding member 440 to continuously press the second side 220 of the upright post 20, and further the friction force between the first friction block 420 and the upright post 20 is further increased until the lifting platform 10 stops falling.
As shown in fig. 13 and 14, fig. 13 is a schematic view of the first friction block 420. Fig. 14 shows a schematic view of the slider 440. The first friction block 420 has a first sliding surface 421 and the slider 440 has a second sliding surface 441. The first sliding surface 421 and the second sliding surface 441 are both parallel to the sliding direction and slidably fit, and the second sliding surface 441 presses the first friction block 420 at least in a direction perpendicular to the column 20 when the first friction block 420 is in frictional contact with the column 20.
The first sliding surface 421 and the second sliding surface 441 are each disposed obliquely and parallel to the sliding direction. When the first friction block 420 is in frictional contact with the upright 20, the first sliding surface 421 and the second sliding surface 441 not only can relatively slide, but also can press the first friction block 420 at least in a direction perpendicular to the upright 20, so as to increase the friction force between the first friction block 420 and the upright 20, and help to stop the lifting platform 10 in time.
The sliding member 440 has a sliding groove 442, and the groove bottom of the sliding groove 442 forms a second sliding surface 441. At least a portion of the first friction block 420 is slidably disposed in the sliding slot 442.
With continued reference to fig. 12-14, the sliding structure 460 includes a slot 461, a first mounting hole 462, a first pin 463, a second mounting hole 464, and a second pin 465.
The elongated hole 461 is provided on one of the first friction block 420 and the slider 440, and extends in the sliding direction. The first and second mounting holes 462 and 464 are provided on the other of the first friction block 420 and the slider 440. The first pin 463 is inserted into the elongated hole 461 and the first mounting hole 462, and is movable along the extending direction of the elongated hole 461. The second pin shaft 465 is inserted into the elongated hole 461 and the second mounting hole 464, and is movable along the extending direction of the elongated hole 461.
As an example, the elongated hole 461 is provided on the first friction block 420, the first mounting hole 462 and the second mounting hole 464 are provided on the slider 440, and the second mounting hole 464 is provided at a distance from the first mounting hole 462 in the sliding direction. When the first friction block 420 slides in the sliding direction with respect to the slider 440, the first and second pins 463 and 465 move in the extending direction of the elongated hole 461.
In a state where the first friction block 420 is not in frictional contact with the column 20, the first pin 463 abuts against one end of the elongated hole 461 near the column 20. The first pin 463 abuts against one end of the elongated hole 461 near the upright post 20, so that the first friction block 420 does not slide downward in a normal state.
As shown in fig. 12, the slider 440 is movably coupled to the first mount 410. The movable jaw assembly 40 further comprises a first adjustment unit 450, the first adjustment unit 450 being connected to the first mount 410 for adjusting the position of the slider 440 relative to the first mount 410 in a direction away from or towards the upright 20.
The position of the sliding member 440 relative to the first mounting seat 410 can be adjusted by the first adjusting unit 450, so as to adjust the gap between the first friction block 420 and the second side 220 of the upright 20, so that the gap can meet the design requirement.
Further, the slider 440 is movably coupled to the first mount 410 in a direction perpendicular to the extension direction of the pillar 20.
As an example, the sliding member 440 is provided with a first kidney-shaped hole 443, and the first kidney-shaped hole 443 extends in a direction perpendicular to the extending direction of the pillar 20. The sliding member 440 and the first mounting base 410 may be connected by a screw, and the screw is inserted through the first kidney-shaped hole 443.
As an example, the first adjusting unit 450 includes a first adjusting lever 451, and the first adjusting lever 451 is screwed to the first mount 410. The axis of the first adjusting lever 451 is perpendicular to the extending direction of the upright 20, and one end of the first adjusting lever 451 abuts against the slider 440.
When the first friction block 420 needs to be adjusted, the first adjusting lever 451 is rotated, so that the first adjusting lever 451 pushes the sliding member 440 to move relative to the first mounting seat 410.
The first friction block 420 includes a first body 422 and a first wear member 423, the first body 422 being slidably coupled to the slider 440, the first wear member 423 being detachably coupled to the first body 422 and being adapted to be in frictional contact with the second side 220. The elongated hole 461 may be formed on the first body 422.
The first wear part 423 may be made of a wear-resistant material. The first wear-resistant member 423 is detachably connected to the first body 422, so that the first wear-resistant member 423 can be replaced conveniently.
As an example, the first wear part 423 and the first body 422 may be connected by a screw, but not limited thereto.
As shown in fig. 9 and 15, fig. 15 shows a cross-sectional view along B-B in fig. 9. The interlocking unit 430 includes a swinging member 431 and a lifting member 432. The swinging member 431 is hinged to the first mounting seat 410, and one end of the swinging member 431 is connected to the driving assembly 50 in a floating manner. One end of the jack 432 is connected to the first friction block 420, and the other end of the jack 432 abuts against the other end of the swinging member 431.
Specifically, the pressure receiving member 510 of the driving assembly 50 is floatingly connected to the swinging member 431. As an example, the swinging member 431 has a notch 433 at one end, and the compression member 510 is floatingly disposed in the notch 433. When the pressure receiving member 510 starts to move downward by the elastic force of the elastic member 520, the pressure receiving member 510 pushes against the edge of the notch 433 of the swinging member 431, so that the swinging member 431 swings.
When the elastic force of the driving assembly 50 is released, the swinging member 431 can be driven to swing relative to the first mounting seat 410, and the swinging member 431 pushes the lifting member 432, so that the first friction block 420 slides along the sliding direction.
As an example, the hinge shaft of the swinging member 431 and the first mount 410 may be horizontally disposed.
When the pressure receiving member 510 moves downward, the diameter-variable portion 513 of the pressure receiving member 510 can abut against the edge of the notch 433 of the swinging member 431, so as to drive the swinging member 431 to swing.
As shown in fig. 7, the lifting mechanism further includes a reset member 90, and the reset member 90 is connected to the lifting table 10 and the linkage unit 430 for resetting the linkage unit 430.
As an example, the return member 90 may be a spring, such as a tension spring. One end of the reset member 90 is connected to the stopper 110 of the elevating table 10, and the other end of the reset member 90 is connected to the swinging member 431. The reset member 90 may provide the swing member 431 with an elastic force to move to a normal state when the driving motor is not stalled and the lift cord 60 is not broken.
For example, in a normal state, the swinging member 431 is horizontally disposed. The swinging member 431 does not contact the lifting member 432, or the swinging member 431 just contacts the lifting member 432.
In another aspect of the present invention, a stacker is provided, the stacker including the lifting mechanism of any one of the above embodiments. The stacker of the embodiment of the present invention has all the advantages and beneficial effects of any one of the embodiments described above due to the lifting mechanism of any one of the embodiments described above, and will not be described here again.
The stacker may further comprise a travelling mechanism which is movable along a track arranged on the road surface. The lifting mechanism can be arranged on the travelling mechanism.
It should be noted that the lifting mechanism according to the embodiment of the present invention is not limited to be applied to a stacker, and may be applied to any device that needs to implement a lifting function, for example, a lifter, etc.
It will be appreciated that the various embodiments/implementations provided by the invention may be combined with one another without conflict and are not illustrated here.
In the inventive embodiments, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined 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; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the invention will be understood by those skilled in the art according to the specific circumstances.
In the description of the embodiments of the invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the invention and to simplify the description, and do not indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the invention.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the invention and is not intended to limit the embodiment of the invention, and various modifications and variations can be made to the embodiment of the invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims (15)

1. A lifting mechanism, comprising:
a lifting table (10);
the upright post (20) is arranged on the side surface of the lifting table (10);
a fixed clamp assembly (30) fixedly connected to the lifting table (10) and arranged on a first side surface (210) of the upright post (20);
a movable clamp assembly (40) connected to the lifting table (10) and arranged on a second side surface (220) of the upright post (20); and
and the driving assembly (50) is used for driving the movable clamp assembly (40) to be in friction contact with the second side surface (220) when the lifting table (10) is falling down, and enabling the movable clamp assembly (40) to push the lifting table (10) to twist until the fixed clamp assembly (30) is in friction contact with the first side surface (210).
2. The lifting mechanism according to claim 1, characterized in that the second side (220) is arranged opposite to the first side (210); the lifting mechanism comprises two upright posts (20), and the two upright posts (20) are respectively arranged on two opposite side surfaces of the lifting table (10);
the lifting mechanism comprises two groups of fixed clamp assemblies (30) and movable clamp assemblies (40) which are correspondingly arranged, and each group of fixed clamp assemblies (30) and movable clamp assemblies (40) are respectively arranged on the first side face (210) and the second side face (220) of the upright post (20);
along the arrangement direction of the two upright posts (20), the fixed jaw assemblies (30) of one group are correspondingly arranged with the movable jaw assemblies (40) of the other group.
3. The lifting mechanism according to claim 1, characterized in that the lifting platform (10) comprises a stop plate (110); the lifting mechanism further comprises:
a lifting rope (60) for driving the lifting table (10) to lift; the lifting rope (60) is arranged through a perforation (111) of the stop plate (110) in a penetrating way, the driving assembly (50) is connected to one end of the lifting rope (60) and can be stopped by the stop plate (110), so that the lifting platform (10) is suspended at one end of the lifting rope (60) through the driving assembly (50) in a normal state.
4. A lifting mechanism according to claim 3, characterized in that the drive assembly (50) comprises:
the pressure receiving piece (510) is provided with a containing groove (511) and a through hole (512) which are communicated with each other, the lifting rope (60) is arranged in the containing groove (511) and the through hole (512) in a penetrating mode, and one end of the lifting rope (60) exposed out of the pressure receiving piece (510) is connected with the pressure receiving piece (510) through a limiting piece (80); one end of the pressure receiving piece (510) is connected to the movable clamp assembly (40); and
and the elastic piece (520) is arranged in the accommodating groove (511), one end of the elastic piece (520) is propped against the stop plate (110), and the other end of the elastic piece is propped against the groove bottom of the accommodating groove (511) and is used for applying elastic force to the pressed piece (510) in the direction away from the stop plate (110).
5. The lift mechanism of claim 1, wherein the lift mechanism further comprises:
-a protection switch (70) connected to the lifting table (10) for obtaining a movement signal of the driving assembly (50); and
and the controller is in signal connection with the protection switch (70) and is used for locking the motor of the lifting mechanism according to the movement signal.
6. The lifting mechanism according to claim 1, wherein the movable jaw assembly (40) comprises:
the first mounting seat (410) is fixedly connected to the lifting table (10);
the first friction block (420) is slidably connected to the first mounting seat (410) along a sliding direction, and the sliding direction is obliquely arranged relative to the extending direction of the length of the upright (20); and
and the linkage unit (430) is connected with the first friction block (420) and the driving assembly (50) and is used for driving the first friction block (420) to move upwards and in a direction close to the upright post (20) until the first friction block (420) is in friction contact with the second side surface (220) when the driving assembly (50) works.
7. The lifting mechanism of claim 6, wherein the movable jaw assembly (40) further comprises a slide (440), the first friction block (420) being slidably connected to the slide (440) by a sliding structure (460) along the sliding direction;
the sliding piece (440) is connected to the first mounting seat (410) and is used for co-extruding the first friction block (420) with the upright (20) when the first friction block (420) is in friction contact with the upright (20).
8. The lifting mechanism according to claim 7, characterized in that the first friction block (420) has a first sliding surface (421), the slider (440) has a chute (442), the chute (442) bottom forming a second sliding surface (441);
at least part of the first friction block (420) is slidably arranged in the sliding groove (442), the first sliding surface (421) and the second sliding surface (441) are parallel to the sliding direction and are slidably matched, and when the first friction block (420) is in friction contact with the upright (20), the second sliding surface (441) presses the first friction block (420) at least along the direction perpendicular to the upright (20).
9. The lifting mechanism of claim 7, wherein the sliding structure (460) comprises:
a long hole (461) provided on one of the first friction block (420) and the slider (440) and extending in the sliding direction;
a first mounting hole (462) provided in the other of the first friction block (420) and the slider (440);
a second mounting hole (464) provided in the other of the first friction block (420) and the slider (440) and spaced apart from the first mounting hole (462) in the sliding direction;
a first pin (463) penetrating through the elongated hole (461) and the first mounting hole (462) and being movable along the extending direction of the elongated hole (461); and
and a second pin shaft (465) which is inserted into the long hole (461) and the second mounting hole (464) and is movable along the extending direction of the long hole (461).
10. The lifting mechanism according to claim 9, wherein the first pin (463) abuts against an end of the elongated hole (461) near the upright (20) in a state where the first friction block (420) is not in frictional contact with the upright (20).
11. The lift mechanism of claim 7, wherein the slider (440) is movably coupled to the first mount (410);
the movable clamp assembly (40) further comprises a first adjusting unit (450), wherein the first adjusting unit (450) is connected to the first mounting seat (410) and is used for adjusting the position of the sliding piece (440) relative to the first mounting seat (410) along the direction away from or close to the upright post (20).
12. The lifting mechanism as recited in claim 6, wherein the linkage unit (430) includes:
a swinging member (431) hinged to the first mounting seat (410), wherein one end of the swinging member (431) is connected to the driving assembly (50) in a floating manner; and
and a jack (432) having one end connected to the first friction block (420) and the other end abutting against the other end of the swinging member (431).
13. The lifting mechanism according to claim 6, further comprising a reset member (90) connected to the lifting table (10) and the linkage unit (430) for resetting the linkage unit (430).
14. The lifting mechanism according to claim 1, wherein the fixed jaw assembly (30) comprises:
the second mounting seat (310) is fixedly connected to the lifting table (10);
a second friction block (320) comprising a second body (321) and a second wear member (322), the second body (321) being adjustably connected to the second mount (310) in a direction towards or away from the upright (20), the second wear member (322) being connected to the second body (321) for frictional contact with the first side (210); and
and the limiting block (330) is connected to the second mounting seat (310) and is used for limiting the second wear-resisting piece (322) to move relatively relative to the second body (321) when the second wear-resisting piece (322) is in friction contact with the first side surface (210).
15. A stacker comprising a lifting mechanism as claimed in any one of claims 1 to 14.
CN202210970500.2A 2022-08-12 2022-08-12 Lifting mechanism and stacker Active CN115196555B (en)

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Application Number Priority Date Filing Date Title
CN202210970500.2A CN115196555B (en) 2022-08-12 2022-08-12 Lifting mechanism and stacker

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CN115196555B true CN115196555B (en) 2023-09-01

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5433292A (en) * 1993-08-26 1995-07-18 Hk Systems, Inc. Stacker
CN105439046A (en) * 2015-12-16 2016-03-30 云南昆船设计研究院 Retaining device for effectively preventing lifting platform from falling
CN212669110U (en) * 2020-05-26 2021-03-09 米亚斯物流设备(昆山)有限公司 Anti-falling device in single-upright-column stacker
CN212712639U (en) * 2020-06-05 2021-03-16 米亚斯物流设备(昆山)有限公司 Stacker carries cargo bed anti-falling device
CN113620208A (en) * 2021-08-04 2021-11-09 深圳市欣畅达科技有限公司 Stacker with anti-falling function
CN217076900U (en) * 2022-04-19 2022-07-29 桐乡三同智能科技有限公司 Novel safety tongs device for goods carrying table of stacker or elevator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5433292A (en) * 1993-08-26 1995-07-18 Hk Systems, Inc. Stacker
CN105439046A (en) * 2015-12-16 2016-03-30 云南昆船设计研究院 Retaining device for effectively preventing lifting platform from falling
CN212669110U (en) * 2020-05-26 2021-03-09 米亚斯物流设备(昆山)有限公司 Anti-falling device in single-upright-column stacker
CN212712639U (en) * 2020-06-05 2021-03-16 米亚斯物流设备(昆山)有限公司 Stacker carries cargo bed anti-falling device
CN113620208A (en) * 2021-08-04 2021-11-09 深圳市欣畅达科技有限公司 Stacker with anti-falling function
CN217076900U (en) * 2022-04-19 2022-07-29 桐乡三同智能科技有限公司 Novel safety tongs device for goods carrying table of stacker or elevator

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