CN115973978A - Anti-falling mechanism and method for lifting platform - Google Patents
Anti-falling mechanism and method for lifting platform Download PDFInfo
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- CN115973978A CN115973978A CN202211671823.8A CN202211671823A CN115973978A CN 115973978 A CN115973978 A CN 115973978A CN 202211671823 A CN202211671823 A CN 202211671823A CN 115973978 A CN115973978 A CN 115973978A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 18
- 230000005484 gravity Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention provides a novel scheme for flexibly designing the relative positions of a traction piece and an anti-falling mechanism so as to effectively reduce the installation space, conveniently change the direction of traction force and shorten the braking triggering time. The anti-falling mechanism of the lifting platform comprises a group of horizontally arranged anti-falling guide post seats which are arranged on a side arm of the cargo carrying platform through bolts, the vertical two ends of a group of guide posts are arranged between the anti-falling guide post seats in parallel, slide blocks are respectively sleeved between the guide posts on the two sides, compression springs are sleeved between the anti-falling guide post seats on the top ends and the slide blocks and on the guide posts, and chain tensioning seats and cam shifting forks are arranged on the slide blocks; a group of arc holes are formed in the side arm of the cargo carrying table, a group of cam shafts are mounted on the side arm of the cargo carrying table, a traction piece is connected to the side portion of the side arm of the cargo carrying table, and a spring is sleeved outside the sleeve between the traction piece and the lifting plate; the anti-falling angle steel is vertically arranged on the side arm of the cargo carrying platform, and a pair of braking cams are oppositely arranged between the anti-falling angle steel.
Description
Technical Field
The invention relates to a novel anti-falling mechanism applied to vertical lifting equipment and a control method thereof, belonging to the technical field of logistics storage.
Background
At present, various types of lifting equipment are generally used in the operation and conveying field of the logistics three-dimensional storage. Such as by a wire rope to transport cargo between different work levels through a cargo bed.
The bearing part of the existing cargo carrying platform usually adopts a steel wire rope or a hoisting chain, after the existing cargo carrying platform is used under a large load for a long time, the potential safety hazard that the bearing part is locally damaged or even broken exists, and at the moment, the cargo carrying platform freely falls down to cause a serious safety accident, so that operating personnel and other equipment in the field environment are injured. It is often necessary to provide and design an associated fall arrest mechanism in advance for the prevention of accidental fall of a load carrier.
The linked anti-falling mechanism is characterized in that a linked anti-falling mechanism with elastic energy storage and no need of additional emergency starting power is provided, and braking force is provided when a bearing part of the cargo carrying table is locally damaged or broken, so that safety accidents caused by accidental falling of the cargo carrying table are avoided. The lifting anti-falling device is arranged on a side arm of the cargo carrying platform and comprises a lever, one end of the lever is connected to a bearing part of the cargo carrying platform, the other end of the lever is connected to a mandrel of the sliding block, and a group of connecting rod shafts are arranged on the sliding block in the direction opposite to the mandrel; a group of guide posts penetrate and are installed in the vertical direction of the sliding block, and the guide posts are sleeved with return springs; 1 group of anti-falling guide post seats are respectively connected with the vertical two sides of the sliding block and the return spring and the upper and lower shaft ends of the connecting rod shaft; the anti-falling guide post seat is arranged on one side of the anti-falling base plate through bolts, and 2 groups of braking inclined blocks are arranged on the other side of the anti-falling base plate; the connecting rod shaft penetrates through the anti-falling base plate and is positioned between the 2 groups of braking inclined blocks, an idler shaft is installed at the shaft end of the connecting rod shaft, and a braking idler wheel is hung at the end part of the idler shaft.
The prior art is complex and needs more installation space, if the anti-falling guide post seat needs to be installed on the anti-falling base plate in advance, the weight of the part on one side of the guide post is large, the instant triggering of the brake idler wheel is not facilitated, and the braking has certain time delay; in addition, the design of changing the lifting force direction is not adopted, the relative positions of the traction piece and the anti-falling mechanism cannot be flexibly arranged, the traction piece can only be arranged above the anti-falling mechanism, and the installation and the use of the integral anti-falling mechanism have certain limitation; moreover, the matching relationship between the brake idle wheel and the brake inclined block results in larger occupied space due to larger weight and volume of the inclined block, which is not beneficial to the miniaturization design of the anti-falling mechanism.
In view of this, the present patent application is specifically proposed.
Disclosure of Invention
The invention provides a novel scheme for flexibly designing the relative positions of a traction piece and an anti-falling mechanism, aiming at solving the problems in the prior art, so that the installation space can be effectively reduced, the direction of traction force can be conveniently changed, and the braking triggering time can be shortened on the premise of not needing additional starting force.
In order to achieve the design purpose, the lifting platform anti-falling mechanism comprises a group of horizontally arranged anti-falling guide post seats which are arranged on a side arm of the cargo carrying platform through bolts, the vertical two ends of a group of guide posts are arranged between the anti-falling guide post seats in parallel, sliding blocks are respectively sleeved between the guide posts on the two sides, compression springs are sleeved between the anti-falling guide post seats at the top ends and the sliding blocks and on the guide posts, and chain tensioning seats and cam shifting forks are arranged on the sliding blocks; the side arm of the cargo carrying platform is provided with a group of arc holes and a group of cam shafts, the side part of the side arm of the cargo carrying platform is connected with a traction piece, the top end of the traction piece is connected with a rope belt for traction of the cargo carrying platform to vertically lift, the bottom end of the traction piece is connected with a lifting plate, and a spring is sleeved outside a sleeve between the traction piece and the lifting plate; the anti-falling angle steel is vertically installed on the side arm of the cargo carrying platform, a pair of brake cams are oppositely arranged between the anti-falling angle steels, the brake cams are respectively suspended on cam shafts, each brake cam is sleeved with a connecting rod in a penetrating manner, the connecting rod is arranged in an arc-shaped hole in a penetrating manner along the direction vertical to the side arm of the cargo carrying platform, and the end part of the connecting rod penetrating the connecting rod is connected to a shifting fork; at least one group of chain wheels installed through a chain wheel seat are arranged on the side arm of the cargo carrying platform; one end of the chain is connected with the chain tensioning seat, the other end of the chain is connected with the chain tensioning screw rod after the chain wheel is wound, and the chain tensioning screw rod is arranged on the traction piece.
Further, the spring sleeve is vertically fixed on the side arm of the cargo carrying platform, and the compression spring is sleeved on the periphery of the spring sleeve.
Further, a detection switch is oppositely arranged on one side of the lifting plate, and when the traction piece acts on the lifting force and the spring is in a compressed state, the lifting plate vertically squeezes the sleeve and contacts with the detection switch.
Furthermore, a detection plate is arranged on the sliding block, and a positioning switch is arranged on a side arm of the cargo carrying platform; when the traction force provided by the traction piece vertically stretches the sliding block to the braking cam through the chain and is not contacted with the anti-falling angle steel, the detection plate is contacted with the positioning switch.
Based on the structural design of the anti-falling mechanism of the lifting platform, the application simultaneously provides the following anti-falling method of the lifting platform: when the cargo carrying platform is normally lifted, the traction force provided by the traction piece is upwards tensioned by the chain, and the tension force of the chain is transmitted to the sliding block so as to enable the sliding block to vertically ascend until the compression spring is compressed and the spring sleeve is squeezed; the shifting fork drives the connecting rod to rise so as to prevent the pair of brake cams from approaching the anti-falling angle steel mutually under the action of gravity; when a rope belt connected to the vertical upper part of the traction part is broken, the upward traction force provided by the traction part disappears, the chain loses the tension force provided by the traction part, the sliding block moves downwards along the guide pillar under the dual action of the elastic restoring force and the gravity of the compression spring, the sliding block drives the shifting fork to move downwards, the shifting fork pushes the connecting rod to slide in the long hole in the shifting fork, so that the pair of brake cams are driven to rotate around the fixed shaft of the camshaft respectively, and the gap between each brake cam and the anti-falling angle steel is gradually reduced; when the brake cam is in contact with the anti-falling angle steel, the brake cam is subjected to vertical upward friction resistance provided by the anti-falling angle steel, so that the brake cam and the anti-falling angle steel are self-locked together, and finally the side arm of the cargo carrying platform prevents the cargo carrying platform from falling.
Further, when the upward traction force provided by the traction piece disappears, the lifting plate moves downwards along the vertical direction under the dual actions of the elastic restoring force of the spring and the gravity and is separated from the contact with the detection switch, and the electric alarm of rope belt breakage is triggered.
Furthermore, in the process that the sliding block moves downwards through the shifting fork to drive the brake cam to rotate around the cam shaft, the detection plate on the sliding block is separated from the contact with the positioning switch on one side of the side arm of the cargo carrying platform, and a brake signal is triggered to give an alarm.
To sum up, the lifting platform anti-falling mechanism and the method thereof have the following advantages:
1. the elastic energy storage is adopted, when the cargo carrying platform falls accidentally, additional emergency power is not needed for starting, the interlocking type anti-falling mechanism can be used for providing locking braking force in real time, the occurrence of related safety accidents is effectively avoided, and the protective effect on operating personnel and equipment is more remarkable.
2. The utility model provides an overall structure is more simple, compact, prevents weighing down guide pillar seat direct mount on the platform side arm of carrying goods, can practice thrift installation space, whole weight is lighter effectively.
3. The chain wheel is adopted to change the lifting force direction, so that the relative positions of the traction piece and the anti-falling mechanism can be more flexibly arranged; if the traction piece is arranged below the anti-falling mechanism, the direction of traction force can be changed through the steering chain wheel, so that the chain can always tighten the sliding block and compress the spring, and the idler wheel is in an open state; if the traction element is above the anti-falling mechanism, no steering chain wheel is needed.
4. This application adopts the braking cam, and the clearance between the cam can be more and more littleer when the braking, can realize the auto-lock, has both shortened braking trigger time and occupation space is less moreover, part cost is lower.
Drawings
The invention will now be further described with reference to the following figures.
FIG. 1 is a schematic structural view of a fall arrest mechanism of the lift platform of the present application;
FIG. 2 is a side schematic view of the structure shown in FIG. 1;
FIG. 3 is a top down schematic view of the structure shown in FIG. 1;
FIG. 4 is a simplified structural diagram of the side arms of the cargo bed shown in FIG. 1;
FIG. 5 is a schematic view of the activated fall arrest state.
Detailed Description
Embodiment 1, as shown in fig. 1 to 5, the anti-falling mechanism of the lifting platform described in the present application includes a set of horizontally disposed anti-falling guide post bases 4 mounted on a side arm 100 of the cargo bed through bolts, wherein two vertical ends of the set of guide posts 5 are respectively mounted in parallel between the anti-falling guide post bases 4 through bolts and gaskets 13, sliders 7 connected through self-lubricating bearings 14 are respectively sleeved between the guide posts 5 on two sides, and compression springs 16 are respectively sleeved between the top anti-falling guide post bases 4 and the sliders 7 and on the guide posts 5;
1 group of jackscrews 15 and nuts are connected at the middle threaded hole of the anti-falling guide post seat 4 positioned at the vertical bottom;
further, the spring bushing 6 is fixed to the guide post 5 by a set screw 18, preventing the bushing 6 from sliding down under the force of gravity. The compression spring 16 is sleeved on the periphery of the spring sleeve 6, so that the spring sleeve 6 provides a guiding and supporting track for elastic deformation of the compression spring 16, and the compression spring 16 is prevented from being crushed;
a chain tensioning seat 9 and a cam shifting fork 10 are arranged on the sliding block 7;
a group of arc-shaped holes 102 are formed in the side arm 100 of the cargo carrying platform, a group of cam shafts 101 are installed on the side arm 100 of the cargo carrying platform, a traction piece 300 is connected to the side portion of the side arm 100 of the cargo carrying platform, the top end of the traction piece 300 is connected with a rope belt for traction of the vertical lifting of the cargo carrying platform, the bottom end of the traction piece 300 is connected with a sleeve 301 and a lifting plate 304, a spring 302 is sleeved outside the sleeve 301 between the traction piece 300 and the lifting plate 304, and a detection switch 303 is oppositely arranged on one side of the lifting plate 304;
the fixing device is provided with anti-falling angle steels 200, a pair of brake cams 8 are oppositely arranged between the anti-falling angle steels 200, the brake cams 8 are respectively hung on cam shafts 101, each brake cam 8 is sleeved with a connecting rod 81 in a penetrating manner, the connecting rods 81 penetrate through arc-shaped holes 102 along a direction perpendicular to the side arms 100 of the cargo carrying platform, and the end parts of the connecting rods 81 penetrate through the arc-shaped holes and are connected to a shifting fork 10;
at least one set of chain wheels 3 mounted by means of chain wheel mounts 2, two sets of chain wheels 3 being provided as shown in fig. 1, are provided on the cargo bed side arms 100 in order to change the direction of the lifting force by means of the steering chain wheels located therebelow, as a function of the relative position of the traction element 300 and the safety brake device. If the pulling member 300 is located above the chain tensioner base 9, as described below, it is not necessary to use a steering sprocket, but only a single set of sprockets 3 may be used.
One end of the chain 17 is connected with the chain tensioning seat 9, the other end of the chain 17 is connected with the chain tensioning screw 1 after the chain 17 winds around the chain wheel 3, and the chain tensioning screw 1 is arranged on the traction piece 300;
under the lifting force of the traction member 300, the spring 302 is in a compressed state until the lifting plate 304 vertically squeezes the sleeve 301 and the lifting plate 304 is in contact with the detection switch 303;
meanwhile, the traction force provided by the traction member 300 is transmitted to the sliding block 7 by the tensile force of the chain 17 for tensioning the screw rod 1 upwards and the chain 17 so that the sliding block 7 ascends vertically until the compression spring 16 is compressed and the spring sleeve 6 is squeezed; at this time, the shifting fork 10 drives the connecting rod 81 to rise to prevent the pair of brake cams 8 from approaching the anti-falling angle steel 200 under the action of gravity, and at this time, the cargo carrying platform can be lifted normally.
Furthermore, a detection plate 12 is arranged on the sliding block 7, and a positioning switch 11 is arranged on the side arm 100 of the cargo carrying platform; when the traction force provided by the traction member 300 vertically stretches the slide block 7 through the chain 17 until the brake cam 8 is not in contact with the anti-falling angle iron 200, the detection plate 12 is in contact with the positioning switch 11.
As shown in fig. 5, when the rope belt connected to the traction member 300 vertically above is broken, the upward traction force provided by the traction member 300 disappears, and at this time, the lifting plate 304 moves vertically downwards under the dual action of the elastic restoring force of the spring 302 and the gravity and is out of contact with the detection switch 303, so as to trigger the electrical alarm of rope belt breakage;
meanwhile, the chain 17 loses the pulling force provided by the traction piece 300, the sliding block 7 moves downwards along the guide post 5 under the dual actions of the elastic restoring force and the gravity of the compression spring 16, the sliding block 7 drives the shifting fork 10 to move downwards, the shifting fork 10 pushes the connecting rod 81 to slide in a long hole in the shifting fork 10, so that the pair of brake cams 8 are driven to rotate around the fixed axis of the cam shaft 101 respectively, and the gap between each brake cam 8 and the anti-falling angle steel 200 is gradually reduced;
when the brake cam 8 is in contact with the anti-falling angle steel 200, the brake cam 8 is subjected to friction resistance which is provided by the anti-falling angle steel 200 and is upwards along the vertical direction, so that the brake cam 8 and the anti-falling angle steel 200 are self-locked together, and finally the cargo carrying platform is prevented from falling through the side arm 100 of the cargo carrying platform;
further, in the process that the sliding block 7 moves downwards through the shifting fork 10 to drive the brake cam 8 to rotate around the cam shaft 101, the detection plate 12 on the sliding block 7 is separated from the contact with the positioning switch 11 on one side of the side arm 100 of the cargo carrying platform, so that a brake signal alarm is triggered, the shutdown of a cargo carrying platform control system can be further triggered, and safety accidents are prevented.
In summary, the embodiments shown in the drawings are only preferred embodiments for achieving the design objectives of the present application, and other alternative structures directly derived by those skilled in the art should also fall within the protection scope of the present application.
Claims (7)
1. An anti-falling mechanism of a lifting platform is characterized by comprising a group of horizontally arranged anti-falling guide post seats which are arranged on a side arm of a cargo carrying platform through bolts, wherein the vertical two ends of a group of guide posts are arranged between the anti-falling guide post seats in parallel, slide blocks are respectively sleeved between the guide posts on the two sides, compression springs are sleeved between the anti-falling guide post seats at the top ends and the slide blocks and on the guide posts, and chain tensioning seats and cam shifting forks are arranged on the slide blocks;
a group of arc holes are formed in the side arm of the cargo carrying platform, a group of cam shafts are mounted on the side arm of the cargo carrying platform, a traction piece is connected to the side portion of the side arm of the cargo carrying platform, the top end of the traction piece is connected with a rope belt for traction of the cargo carrying platform to vertically lift, the bottom end of the traction piece is connected with a lifting plate, and a spring is sleeved outside a sleeve between the traction piece and the lifting plate;
the anti-falling angle steel is vertically installed on the side arm of the cargo carrying platform, a pair of brake cams are oppositely arranged between the anti-falling angle steels, the brake cams are respectively suspended on cam shafts, each brake cam is sleeved with a connecting rod in a penetrating manner, the connecting rod is arranged in an arc-shaped hole in a penetrating manner along the direction vertical to the side arm of the cargo carrying platform, and the end part of the connecting rod penetrating the connecting rod is connected to a shifting fork;
at least one group of chain wheels installed through a chain wheel seat are arranged on the side arm of the cargo carrying platform;
one end of the chain is connected with the chain tensioning seat, the other end of the chain is connected with the chain tensioning screw rod after the chain wheel is wound, and the chain tensioning screw rod is arranged on the traction piece.
2. The lift platform fall arrest mechanism according to claim 1, wherein: the spring sleeve is vertically fixed on the side arm of the cargo carrying platform, and the compression spring is sleeved on the periphery of the spring sleeve.
3. The lift platform fall arrest mechanism according to claim 1 or 2, wherein: the detection switch is oppositely arranged on one side of the lifting plate, and when the spring is in a compressed state under the action of the lifting force of the traction piece, the lifting plate vertically squeezes the sleeve and contacts with the detection switch.
4. The lift platform fall arrest mechanism according to claim 3, wherein: a detection plate is arranged on the sliding block, and a positioning switch is arranged on a side arm of the cargo carrying platform; when the traction force provided by the traction piece vertically stretches the sliding block to the braking cam through the chain and is not contacted with the anti-falling angle steel, the detection plate is contacted with the positioning switch.
5. A falling prevention method using the lifting platform falling prevention mechanism of any one of claims 1 to 4, characterized in that: when the loading platform is normally lifted, the traction force provided by the traction piece is upwards tensioned by the chain, and the tension force of the chain is transmitted to the sliding block so as to enable the sliding block to vertically ascend until the compression spring is compressed and the spring sleeve is squeezed; the shifting fork drives the connecting rod to rise so as to prevent the pair of brake cams from approaching the anti-falling angle steel mutually under the action of gravity;
when the rope belt connected to the vertical upper part of the traction part is broken, the upward traction force provided by the traction part disappears, the chain loses the tension force provided by the traction part, the sliding block moves downwards along the guide pillar under the dual actions of the elastic restoring force and the gravity of the compression spring, the sliding block drives the shifting fork to move downwards, the shifting fork pushes the connecting rod to slide in the long hole in the shifting fork, so that the pair of brake cams are driven to respectively rotate around the fixed axis of the camshaft, and the gap between each brake cam and the anti-falling angle steel is gradually reduced;
when the brake cam is in contact with the anti-falling angle steel, the brake cam is subjected to vertical upward friction resistance provided by the anti-falling angle steel, so that the brake cam and the anti-falling angle steel are self-locked together, and finally the side arm of the cargo carrying platform prevents the cargo carrying platform from falling.
6. The lift platform fall protection method according to claim 5, characterized in that: when the upward traction force provided by the traction piece disappears, the lifting plate spring moves downwards along the vertical direction under the dual actions of the elastic restoring force and the gravity and is separated from the contact with the detection switch, and the electric alarm of rope belt breakage is triggered.
7. The lift platform fall protection method according to claim 5 or 6, wherein: when the sliding block moves downwards through the shifting fork to drive the brake cam to rotate around the cam shaft, the detection plate on the sliding block is separated from the contact with the positioning switch on one side of the side arm of the cargo carrying platform, and a brake signal is triggered to alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211671823.8A CN115973978A (en) | 2022-12-26 | 2022-12-26 | Anti-falling mechanism and method for lifting platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211671823.8A CN115973978A (en) | 2022-12-26 | 2022-12-26 | Anti-falling mechanism and method for lifting platform |
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| Publication Number | Publication Date |
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| CN115973978A true CN115973978A (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211671823.8A Pending CN115973978A (en) | 2022-12-26 | 2022-12-26 | Anti-falling mechanism and method for lifting platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117622751A (en) * | 2024-01-26 | 2024-03-01 | 天津迦自机器人科技有限公司 | Goods transport AGV capable of docking warehouse |
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2022
- 2022-12-26 CN CN202211671823.8A patent/CN115973978A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117622751A (en) * | 2024-01-26 | 2024-03-01 | 天津迦自机器人科技有限公司 | Goods transport AGV capable of docking warehouse |
| CN117622751B (en) * | 2024-01-26 | 2024-04-30 | 天津迦自机器人科技有限公司 | Goods transport AGV capable of docking warehouse |
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