CN114291764A - Vertical positioning and fixing method for cargo carrying platform - Google Patents
Vertical positioning and fixing method for cargo carrying platform Download PDFInfo
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- CN114291764A CN114291764A CN202111532627.8A CN202111532627A CN114291764A CN 114291764 A CN114291764 A CN 114291764A CN 202111532627 A CN202111532627 A CN 202111532627A CN 114291764 A CN114291764 A CN 114291764A
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Abstract
The vertical positioning and fixing method of the cargo carrying platform adopts the technical scheme that a linkage mechanism is arranged between the cargo carrying platform and a lifter frame to carry out mutual butt joint and limit, and a mechanism dead point in the horizontal direction is formed on a straight line by pushing through a connecting rod to lock the vertical height position, so that the design purposes that the cargo carrying platform is locked by one power source to move vertically integrally and can be used for accurately positioning and fixing a large load are achieved. The vertical positioning and fixing method of the cargo carrying platform is that a positioning groove is arranged on a frame or a wall body of a lifter, and a speed reducing motor and a guide rail are arranged on the cargo carrying platform; connecting an output shaft of the speed reducing motor to one end of at least one group of connecting rods through a rotating block, wherein the other end of each connecting rod is connected with the near end of a positioning lug; a slide block is arranged at the bottom of the positioning lug and is movably connected with the guide rail; when the loading platform moves to a designated station along the vertical direction, the rotating block pushes the connecting rod out laterally, the connecting rod pushes the positioning lug to enter the positioning groove along the guide rail direction, and the loading platform is locked and positioned along the vertical direction.
Description
Technical Field
The invention relates to a positioning and fixing method applied to vertical layer-changing conveying of a loading platform of a hoist, belonging to the technical field of logistics sorting.
Background
Along with the rapid development of the domestic e-commerce industry, the application of automatic sorting equipment is increasing day by day, and in logistics transition, a lifting machine is usually used to lift or lower devices such as trays and cargo carrying tables from one working height to another working height, so that the vertical warehouse is assisted to finish warehousing and ex-warehouse of materials, layer changing operation and maintenance work of trolleys and the like.
When conveying heavy goods across a floor elevator, the following 2 problems of inaccurate positioning usually occur: firstly, the lifting chain is too long, so that the phenomenon of obvious stretching is easily caused, the positioning precision of the cargo carrying platform in the vertical direction is directly influenced due to the fact that the chain is too long, and the station fall of the cargo carrying platform is further increased after the cargo carrying platform runs for a long time, so that normal cargo transshipment is influenced; secondly, when the cargo carrying platform moves downwards from a higher floor to a bottom layer with larger load and stops, the unloaded cargo carrying platform obviously moves upwards for a certain height due to the stretching restoring force of the chain, and if the cargo is conveyed to the cargo carrying platform, the cargo is difficult to be loaded due to the vertical height difference.
The counter measure against the above existing problems is usually to add an electrical detection device, such as a barcode for calibration and positioning to control the cargo bed to re-run to the initial or designated height, but such components are expensive and complicated in adjustment process. In addition, the induction switch is adopted to perform the brake control of the cargo carrying platform, and the damage of electric components such as a driving motor and the like is formed due to frequent running control signals, so that the relative positioning precision is not high.
In view of this, the present patent application is specifically proposed.
Disclosure of Invention
The invention relates to a vertical positioning and fixing method of a cargo carrying platform, which aims to solve the problems in the prior art and adopts a linkage mechanism arranged between the cargo carrying platform and a lifter frame to carry out mutual butt joint and limit, and a connecting rod is used for pushing a mechanism dead point in the horizontal direction formed on a straight line to lock the vertical height position, so that the design purposes of locking the integral vertical motion of the cargo carrying platform by one power source and accurately positioning and fixing large loads can be achieved.
In order to achieve the design purpose, the vertical positioning and fixing method of the cargo carrying platform is characterized in that a positioning groove is arranged on a frame or a wall body of a lifter, and a speed reducing motor and a guide rail are arranged on the cargo carrying platform; connecting an output shaft of the speed reducing motor to one end of at least one group of connecting rods through a rotating block, wherein the other end of each connecting rod is connected with the near end of a positioning lug; a slide block is arranged at the bottom of the positioning lug and is movably connected with the guide rail; when the loading table runs to a designated station in the vertical direction, the elevator PLC sends an instruction to the speed reducing motor, the speed reducing motor is started to drive the rotating block to rotate, the rotating block pushes the connecting rod out in the lateral direction, the connecting rod pushes the positioning bump to enter the positioning groove in the guide rail direction, and the loading table is locked and positioned in the vertical direction; after the goods are transferred, the elevator PLC sends an instruction to the speed reducing motor, the speed reducing motor drives the rotating block to rotate reversely so as to pull back the connecting rod to the center, the connecting rod pulls the positioning lug to be separated from the positioning groove along the direction of the guide rail, and the loading platform moves in a vertical lifting mode.
Furthermore, an output shaft of the speed reducing motor is connected to the vertical center of the rotating block through a shaft end gland and a bolt, two ends of the rotating block are symmetrically connected to one ends of the two groups of connecting rods through a group of pin shafts and fisheye bearings respectively, and the other ends of the connecting rods are connected to the near ends of the positioning lugs through the other group of fisheye bearings; under the drive of the speed reducing motor, the rotating block rotates around the vertical center to synchronously push out the two sides or synchronously pull back the two groups of connecting rods to the center, and the two groups of connecting rods simultaneously push one group of positioning lugs to be symmetrically inserted into the positioning grooves or synchronously separate from the positioning grooves.
Furthermore, two groups of proximity switches are arranged on the cargo carrying platform, and an induction plate is arranged on the side part of the positioning lug to enable the induction plate to move back and forth along the direction of the guide rail along with the positioning lug; the proximity switch detects the position change of the induction plate between the near end and the far end, a detection result signal is sent to the elevator PLC, and the PLC controls the power-off of the speed reducing motor.
In summary, the cargo bed vertical positioning and fixing device and the cargo bed vertical positioning and fixing method have the following advantages:
1. the whole device has compact and exquisite structure, does not need to occupy larger installation space and change the whole structure of the existing elevator cargo carrying platform, can completely lock the vertical operation of the cargo carrying platform by only adopting a horizontal power source, and has higher positioning precision and higher speed;
2. the positioning blocks are pushed by the connecting rods to be accurately clamped into the mechanical dead points, the whole group of connecting rods can stably maintain a locking state and are not damaged by external factors, and the use safety of the cargo carrying platform is improved;
3. the reliable positioning of the cargo loading platform in a heavy-load state can be realized only by driving the small-torque driving force of the motor, the using effect is outstanding, and the energy consumption is low;
4. through the design of the horizontal link mechanism of symmetry, can convert vertical chain lifting force and the dead weight of the loading platform into the horizontal thrust to the center of the loading platform, offset the chain lifting force and the dead weight of the loading platform through two groups of connecting rods and transfer the chain lifting force and the dead weight to a fixed frame or a wall body on the outer side, and have no obvious adverse effect on the vertical positioning of the loading platform.
Drawings
The present application will now be further described with reference to the following drawings.
FIG. 1 is a schematic view of a vertical positioning and fixing device for a cargo bed according to the present application;
FIG. 2 is an exploded view of one side structure as shown in FIG. 1;
FIG. 3 is a schematic view of a vertical positioning fixture as described herein applied to a lift load bed;
in the attached drawings, 1-a speed reducing motor, 2-a motor support, 3-a rotating block, 4-a fisheye bearing, 5-a connecting rod, 6-a proximity switch, 7-an induction plate, 8-a sliding block, 9-a guide rail, 10-a V-shaped positioning lug, 11-a V-shaped positioning groove, 12-a shaft end gland, 13-a bolt, 14-a pin shaft, a cargo carrying platform 20 and a hoisting machine frame 30.
Detailed Description
Wherein, gear motor 1 is through fixing on motor support 2, and the output shaft of gear motor 1 passes through axle head gland 12 and bolt 13 and connects in the vertical center of rotatory piece 3.
Two ends of the rotating block 3 are symmetrically connected to one ends of the two groups of connecting rods 5 through a group of pin shafts 14 and fisheye bearings 4 respectively, and the other ends of the connecting rods 5 are connected to the near ends of the V-shaped positioning lugs 10 through the other group of fisheye bearings 4; under the drive of the speed reducing motor 1, the rotating block 3 rotates around the vertical central line of the rotating block to synchronously push and pull the connecting rods 5 positioned on two sides, and under the drive of the pulling force or the pushing force of the connecting rods 5, the far ends of the V-shaped positioning lugs 10 are inserted into the V-shaped positioning grooves 11 to realize the locking positioning of the cargo carrying platform 20 along the vertical direction or separate from the V-shaped positioning grooves 11 to realize the vertical release of the cargo carrying platform 20.
2 groups of sliding blocks 8 are arranged at the bottom of the V-shaped positioning lug 10, and the sliding blocks 8 are movably connected to the guide rail 9;
two sets of proximity switches 6 are mounted on the cargo bed 20, the sensing plate 7 is mounted on the side of the V-shaped positioning projection 10 so as to be capable of moving back and forth along the direction of the guide rail 9 following the V-shaped positioning projection 10, and the proximity switches 6 detect the position change of the sensing plate 7 in real time to form state information for the V-shaped positioning projection 10 relative to the cargo bed 20.
Based on the application of the vertical positioning and fixing device of the cargo carrying platform, the application provides the following vertical positioning and fixing method of the cargo carrying platform:
two groups of V-shaped positioning grooves 11 are symmetrically arranged on a hoisting machine frame 30 or a wall h, and a speed reducing motor 1 (through a motor support 2) and two groups of guide rails 9 are arranged on a cargo carrying platform 20;
the output shaft of the speed reducing motor 1 is connected to the vertical center of the rotating block 3 through a shaft end gland 12 and a bolt 13, two ends of the rotating block 3 are symmetrically connected to one ends of two groups of connecting rods 5 through a group of pin shafts 14 and fisheye bearings 4 respectively, and the other ends of the connecting rods 5 are connected to the near ends of the V-shaped positioning lugs 10 through another group of fisheye bearings 4;
2 groups of sliding blocks 8 are arranged at the bottom of the V-shaped positioning lug 10, and the sliding blocks 8 are movably connected with the guide rail 9;
two sets of proximity switches 6 are mounted on the cargo bed 20, and a sensor plate 7 is mounted on the side of the V-shaped positioning projection 10 so as to be capable of reciprocating in the direction of the guide rail 9 following the V-shaped positioning projection 10.
When the cargo carrying platform 20 vertically runs to a designated station, the elevator PLC sends an instruction to the speed reducing motor 1, the speed reducing motor 1 is started to drive the rotating block 3 to rotate around the vertical center of the rotating block, the rotating block 3 synchronously pushes out two groups of connecting rods 5 to two sides, and the connecting rods 5 push the V-shaped positioning lugs 10 to enter the V-shaped positioning grooves 11 along the direction of the guide rail 9;
the proximity switch 6 detects the position change of the induction plate 7 from the near end to the far end, a detection result signal is sent to the elevator PLC, the PLC controls the speed reducing motor 1 to be powered off, the V-shaped positioning bump 10 is maintained in the inserting state in the V-shaped positioning groove 11, and the loading platform 20 is locked and positioned in the vertical direction;
after the goods are transferred, the elevator PLC sends an instruction to the speed reducing motor 1, the speed reducing motor 1 is started to drive the rotating block 3 to rotate reversely around the vertical center of the speed reducing motor, the rotating block 3 synchronously pulls back two groups of connecting rods 5 from two sides to the center, and the connecting rods 5 pull the V-shaped positioning lugs 10 to be separated from the V-shaped positioning grooves 11 along the direction of the guide rail 9;
the proximity switch 6 detects the position change of the induction plate 7 from the far end to the near end, sends a detection result signal to the elevator PLC, the PLC controls the speed reducing motor 1 to be powered off, the V-shaped positioning bump 10 is completely separated, and the loading platform 20 is released along the vertical direction.
In the vertical positioning and fixing method of the cargo carrying platform, the V-shaped positioning protrusion 10 is completely separated from the V-shaped positioning groove 11 in the initial state and can freely move up and down along the vertical direction with the cargo carrying platform 20, and the cargo carrying platform 20 does not interfere with the V-shaped positioning groove 11.
By applying the vertical positioning and fixing method for the cargo carrying platform, under the condition of heavy load, after the cargo carrying platform 20 runs to a designated station, locking positioning on two horizontal sides is firstly carried out through the vertical positioning and fixing device, namely, the V-shaped positioning lug 10 is completely inserted into the V-shaped positioning groove 11, the cargo carrying platform 20 cannot move vertically again, and then cargo transferring is carried out. Even if the lifting chain is significantly stretched due to the excessively long length, the load table 20 is vertically locked, and the adverse effect of the excessively long chain length can be overcome to maintain the vertical positioning with higher accuracy.
After long-time operation, based on the error of the travel distance of the driving connecting rod 5 of the speed reducing motor 1 and the accumulation of the friction loss between the slide block 8 bearing the V-shaped positioning bump 10 and the guide rail 9, the moving position change of the induction plate 7 is detected in real time by the proximity switch 6 in the vertical positioning and fixing method of the cargo carrying platform, so that the PLC is assisted to control the switching between the opening and the power failure of the speed reducing motor 1, the state that the V-shaped positioning bump 10 is inserted into the V-shaped positioning groove 11 can be accurately controlled, the complete insertion between the V-shaped positioning bump and the V-shaped positioning groove can be realized, the vertical locking of the cargo carrying platform can be realized, and the V-shaped positioning bump and the V-shaped positioning groove can be completely separated without influencing the normal lifting operation of the cargo carrying platform 20.
In summary, the embodiments presented in connection with the figures are only preferred. Those skilled in the art can derive other alternative structures according to the design concept of the present invention, and the alternative structures should also fall within the scope of the solution of the present invention.
Claims (3)
1. A vertical positioning and fixing method for a cargo carrying platform is characterized by comprising the following steps: installing a positioning groove on a frame or a wall body of the elevator, and installing a speed reducing motor and a guide rail on a cargo carrying table;
connecting an output shaft of the speed reducing motor to one end of at least one group of connecting rods through a rotating block, wherein the other end of each connecting rod is connected with the near end of a positioning lug;
a slide block is arranged at the bottom of the positioning lug and is movably connected with the guide rail;
when the loading table runs to a designated station in the vertical direction, the elevator PLC sends an instruction to the speed reducing motor, the speed reducing motor is started to drive the rotating block to rotate, the rotating block pushes the connecting rod out in the lateral direction, the connecting rod pushes the positioning bump to enter the positioning groove in the guide rail direction, and the loading table is locked and positioned in the vertical direction;
after the goods are transferred, the elevator PLC sends an instruction to the speed reducing motor, the speed reducing motor drives the rotating block to rotate reversely so as to pull back the connecting rod to the center, the connecting rod pulls the positioning lug to be separated from the positioning groove along the direction of the guide rail, and the loading platform moves in a vertical lifting mode.
2. The cargo bed vertical positioning and fixing method according to claim 1, characterized in that: connecting the output shaft of the speed reducing motor to the vertical center of the rotating block through a shaft end gland and a bolt, symmetrically connecting two ends of the rotating block to one end of two groups of connecting rods through a group of pin shafts and fisheye bearings respectively, and connecting the other end of each connecting rod to the near end of the positioning lug through the other group of fisheye bearings;
under the drive of the speed reducing motor, the rotating block rotates around the vertical center to synchronously push out the two sides or synchronously pull back the two groups of connecting rods to the center, and the two groups of connecting rods simultaneously push one group of positioning lugs to be symmetrically inserted into the positioning grooves or synchronously separate from the positioning grooves.
3. The cargo bed vertical positioning and fixing method according to claim 2, characterized in that: two groups of proximity switches are arranged on the cargo carrying platform, and an induction plate is arranged on the side part of the positioning lug to enable the induction plate to move along the direction of the guide rail along with the positioning lug in a reciprocating manner;
the proximity switch detects the position change of the induction plate between the near end and the far end, a detection result signal is sent to the elevator PLC, and the PLC controls the power-off of the speed reducing motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111532627.8A CN114291764B (en) | 2021-12-15 | 2021-12-15 | Vertical positioning and fixing method for cargo carrying platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111532627.8A CN114291764B (en) | 2021-12-15 | 2021-12-15 | Vertical positioning and fixing method for cargo carrying platform |
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| Publication Number | Publication Date |
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| CN114291764A true CN114291764A (en) | 2022-04-08 |
| CN114291764B CN114291764B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111532627.8A Active CN114291764B (en) | 2021-12-15 | 2021-12-15 | Vertical positioning and fixing method for cargo carrying platform |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858400A (en) * | 2016-05-31 | 2016-08-17 | 西继迅达（许昌）电梯有限公司 | Elevator system capable of preventing accidental movement |
| CN206970116U (en) * | 2017-07-18 | 2018-02-06 | 昆山普罗虎贲升降技术有限公司 | Lifting platform with locking device |
| CN209892660U (en) * | 2019-04-23 | 2020-01-03 | 青岛茂源金属集团有限公司 | Double-positioning linkage push rod device |
| CN213231402U (en) * | 2020-08-31 | 2021-05-18 | 南京音飞储存设备（集团）股份有限公司 | Subassembly is prevented subsiding by lifting machine |
-
2021
- 2021-12-15 CN CN202111532627.8A patent/CN114291764B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858400A (en) * | 2016-05-31 | 2016-08-17 | 西继迅达（许昌）电梯有限公司 | Elevator system capable of preventing accidental movement |
| CN206970116U (en) * | 2017-07-18 | 2018-02-06 | 昆山普罗虎贲升降技术有限公司 | Lifting platform with locking device |
| CN209892660U (en) * | 2019-04-23 | 2020-01-03 | 青岛茂源金属集团有限公司 | Double-positioning linkage push rod device |
| CN213231402U (en) * | 2020-08-31 | 2021-05-18 | 南京音飞储存设备（集团）股份有限公司 | Subassembly is prevented subsiding by lifting machine |
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| CN114291764B (en) | 2024-04-16 |
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