CN114516605A - Super-heavy-load telescopic fork and load calculation method thereof - Google Patents
Super-heavy-load telescopic fork and load calculation method thereof Download PDFInfo
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- CN114516605A CN114516605A CN202111605025.0A CN202111605025A CN114516605A CN 114516605 A CN114516605 A CN 114516605A CN 202111605025 A CN202111605025 A CN 202111605025A CN 114516605 A CN114516605 A CN 114516605A
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- 238000004364 calculation method Methods 0.000 title abstract description 6
- 230000000712 assembly Effects 0.000 claims description 49
- 238000000429 assembly Methods 0.000 claims description 49
- 238000005096 rolling process Methods 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 12
- 244000309464 bull Species 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 239000004677 Nylon Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 229920001778 nylon Polymers 0.000 abstract description 2
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- 238000005299 abrasion Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, 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
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices 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
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/122—Platforms; Forks; Other load supporting or gripping members longitudinally movable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, 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
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices 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
- B66F9/075—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, 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
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices 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
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/24—Electrical devices or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
Abstract
The invention discloses an overload telescopic pallet fork and a load calculation method, which comprise an upper fork assembly, a middle fork assembly, a lower fork assembly, a driving assembly and a tensioner assembly, wherein the driving assembly and the tensioner assembly are arranged on the lower fork assembly and are connected with each other, the upper fork assembly is connected with the middle fork assembly, the middle fork assembly is connected with the lower fork assembly, the upper fork assembly is connected with the driving assembly through the middle fork assembly and the tensioner assembly, and the upper fork assembly, the middle fork assembly and the lower fork assembly can be sequentially unfolded. The invention provides a V-shaped telescopic fork for an overload fork, aiming at an aluminum coil, and the V-shaped telescopic fork does not need a traditional tray and can be used for taking goods on the V surface, so that the surface of the aluminum coil is not damaged. The telescopic fork has compact structure and good mechanical property; for adapting to heavy load, optimized about spacing mode, changed traditional nylon material's guide block, for leading wheel subassembly, wheel components, changed the slip into the roll, intensity is higher, and wearing and tearing are still less.
Description
Technical Field
The invention belongs to the technical field of advanced production, manufacturing and automation, and particularly relates to an ultra-heavy-load telescopic fork. The invention also relates to a load calculation method of the super-heavy telescopic fork.
Background
As is known, telescopic forks consist of a fixed lower base and one or more overlapping extensible members that move in a bidirectional telescopic manner in order to move the load. The number of moving telescoping members (two, three or four) is selected to suit the desired overall length of travel and the size of the load to be handled.
The telescopic fork is divided into a single-extension telescopic fork and a double-extension telescopic fork. The flexible fork of single position that stretches out and draws back of general use on the existing market, its goods process of getting is: the telescopic fork is directly driven by a chain, or the telescopic fork is driven by a gear rack structure to extend out; the telescopic fork extends out and then reaches the lower part of the goods, and the stacker drives the telescopic fork to ascend so that the goods leave the goods shelf; after the goods are taken, the telescopic fork contracts. Its advantage is that flexible fork flexible process is simple, and its shortcoming is flexible volume is little, and it is less to get the goods scope, and space utilization is low. Although the double-extension telescopic fork has the advantage of large telescopic amount, the chain transmission structure is complex, and the installation and the maintenance are inconvenient.
Especially for heavier goods, the single-extension telescopic fork and the double-extension telescopic fork have the defects of complex structure and high price, and are not economical and practical when the goods are stored and taken in small size and light weight.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide the super-heavy-load telescopic fork, which solves the problems of unreasonable structure, heavy weight and the like in the original telescopic fork to a certain extent when the telescopic fork in the prior art carries heavier goods, and the safety and practicability of the telescopic fork in goods storage and taking are limited; meanwhile, the problem that the structure is not compact and is not suitable for heavy goods loading still exists.
The technical scheme is as follows: the utility model provides a flexible fork of overweight load, includes fork subassembly, well fork subassembly, lower fork subassembly, drive assembly and tensioning ware subassembly all set up on the fork subassembly down to drive assembly and well fork subassembly are connected, go up fork subassembly and well fork subassembly and connect, well fork subassembly and lower fork subassembly are connected, go up the fork subassembly and be connected with the drive assembly through well fork subassembly and tensioning ware subassembly, go up fork subassembly, well fork subassembly and lower fork subassembly and can launch in proper order. The invention provides a V-shaped telescopic fork for an ultra-heavy load, aiming at an aluminum coil, and the V-shaped telescopic fork is used for taking the aluminum without a traditional tray, so that the surface of the aluminum coil is not damaged. The telescopic fork has compact structure and good mechanical property.
Furthermore, the telescopic fork with the overload load comprises an upper fork accessory tool, a heat insulation plate, an upper fork upper plate, two symmetrically arranged upper fork side plates and a group of upper fork roller assemblies, wherein the two symmetrically arranged upper fork side plates are connected in parallel, the upper end parts of the two symmetrically arranged upper fork side plates are fixedly connected with the upper fork upper plate, the two symmetrically arranged upper fork side plates and the upper fork upper plate are arranged in a T shape, the heat insulation plate is fixedly arranged on the upper end surface of the upper fork upper plate, the upper fork accessory tool is fixedly arranged on the heat insulation plate, a group of upper fork roller assemblies are arranged on the outer side wall of the upper fork side plate, a group of upper fork roller assemblies on the same side wall of the upper fork side plate are positioned on the same straight line, and the group of upper fork roller assemblies are in rolling connection with the middle fork assembly.
Furthermore, according to the super-heavy-load telescopic fork, the upper end face of the upper fork auxiliary tool is provided with the V-shaped groove.
Furthermore, the super-heavy-duty telescopic pallet fork comprises a middle fork, a group of upper fork guide wheels, a sprocket wheel assembly, two middle fork driving racks and a group of upper fork supporting wheels, wherein the middle fork is arranged in a rectangular body, an upper fork roller track groove is formed in the upper end surface of the middle fork along the length direction, the cross section of the upper fork roller track groove is arranged in an inverted convex shape, a group of upper fork roller assemblies are arranged in the upper fork roller track groove on the outer side wall of the upper fork side plate and are in rolling connection with the upper fork roller track groove, lower fork roller track grooves are formed in the two side walls of the middle fork in the length direction, the cross section of each lower fork roller track groove is rectangular, rollers on the lower fork assemblies are in rolling connection with the lower fork roller track grooves, and a group of upper fork guide wheels and a group of upper fork supporting wheels are arranged on the upper end surface of the middle fork close to the edge position, the chain wheel assembly is arranged in the middle fork, the lower end of the middle fork is provided with a rectangular groove, and two symmetrically-arranged middle fork driving racks are oppositely arranged on the inner wall of the rectangular groove.
Further, foretell flexible fork of overweight capacity, all be equipped with spacing dog groove on well fork length direction's the both sides wall and rock spacing recess, spacing dog groove can carry out the spacing of well fork.
Furthermore, the telescopic pallet fork with a heavy load comprises two symmetrically arranged lower forks, a group of middle fork guide roller assemblies, a group of middle fork supporting eccentric wheel assemblies and a mounting plate assembly, wherein the lower end parts of the two symmetrically arranged lower forks are fixedly arranged on the mounting plate assembly, the cross section formed by the two symmetrically arranged lower forks and the mounting plate assembly is U-shaped, the inner walls of the lower forks opposite to each other are respectively provided with the group of middle fork guide roller assemblies, the group of middle fork guide roller assemblies are positioned on the same straight line, the group of middle fork guide roller assemblies are arranged in the lower fork roller track grooves, the group of middle fork guide roller assemblies are in rolling connection with the lower fork roller track grooves, the group of middle fork supporting eccentric wheel assemblies are arranged on the upper end surface of the mounting plate assembly, and the group of middle fork supporting eccentric wheel assemblies are positioned at the four corner positions of the rectangular cross section, the lower end face of the middle fork is in rolling connection with a group of middle fork supporting eccentric wheel assemblies, the driving assembly is arranged on the outer wall of one of the two symmetrically arranged lower forks, the tensioner assembly is arranged on the mounting plate assembly, the inner wall of the lower fork is provided with a limiting screw and a group of central line limiting idler wheels, the limiting screw is arranged in a limiting stop groove, the group of central line limiting idler wheels are arranged in a shaking limiting groove, and the group of central line limiting idler wheels are in rolling connection with the shaking limiting groove.
Furthermore, the driving assembly comprises a base, a motor bracket, a rotating shaft, a motor end chain wheel, a transmission chain, a driving end chain wheel, a group of adjusting bolts and a group of connecting bolts, wherein the rotating shaft is arranged on the base, one end of the motor bracket is hinged with the base through the rotating shaft, the motor is fixedly arranged on the motor bracket, the motor end chain wheel is connected with a rotating shaft of the motor, the motor end chain wheel is connected with the driving end chain wheel through the transmission chain, the driving end chain wheel is arranged on the base through the rotating shaft, the group of adjusting bolts penetrate through the motor bracket and are in threaded connection with the base, the group of connecting bolts penetrate through the motor bracket and are in threaded connection with the base, the group of adjusting bolts and the group of connecting bolts are both positioned on one side of the motor bracket, which is far away from the rotating shaft, and the lower end part of the base is provided with a gear shaft bracket, and the gear shaft support is provided with a gear shaft, and the end part of the gear shaft extending out of the base is connected with the driving end chain wheel.
Furthermore, the gear and gear shaft of the telescopic pallet fork with the overload comprises a long gear shaft component, a short gear shaft component and two large gear shaft components which are symmetrically arranged, the two symmetrically arranged large gear shaft assemblies are respectively positioned at two sides of the short gear shaft assembly, the long gear shaft assembly comprises a gear shaft and two symmetrically arranged gears I, the short gear shaft component comprises a short gear shaft and two symmetrically arranged gears II, the large gear shaft component comprises a large gear shaft and two symmetrically arranged large gears, the gear shaft, the gear shaft and the gearwheel shaft are arranged in parallel, the two symmetrically arranged first gears, the two symmetrically arranged second gears and the two symmetrically arranged gearwheel shafts are arranged in one-to-one correspondence, the first gear is meshed with the second gear, and the large gear is meshed with the middle fork driving rack.
Further, foretell flexible fork of overweight capacity, tensioning ware subassembly includes fixed block subassembly, tensioning ware subassembly, dog and flies the chain, fixed block subassembly is fixed to be set up on last fork subassembly, tensioning ware subassembly is fixed to be set up on lower fork subassembly, the dog sets up on tensioning ware subassembly to dog and flying the chain contact, fly the chain and go up the fork subassembly and connect.
The invention also provides a load calculation method for the super-heavy-load telescopic fork, F1And F2Respectively, the load between the upper fork assembly and the middle fork assembly, F3And F4Respectively, the load between the middle fork assembly and the lower fork assembly:
the technical scheme shows that the invention has the following beneficial effects: the super-heavy-load telescopic fork has the following advantages that:
1. what contact with the goods is the V template, can ask and get cylindric goods.
2. For adapting to heavy load, the left-right limiting mode is optimized, the traditional guide block made of nylon material is changed, and the guide block is a guide wheel component and a roller component, and the guide block is changed from sliding to rolling, so that the strength is higher, and the abrasion is less.
3. Because the mass of the motor is about 150kg, the traditional mode of tensioning the roller chain by using a bolt top is abandoned, and the tensioning is realized by using the self weight of the motor instead. Detailed description of the preferred embodimentsthe present invention is additionally claimed for teaching purposes and is incorporated herein by reference.
4. In the power transmission process, double rows of gears are used for transmission, the strength is reliable, space is left for a flying chain, and the structure is compact.
5. The middle fork is changed from an integral type to an assembled type, so that the processing and transporting difficulty is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of an extra heavy duty telescopic fork according to the present invention;
FIG. 2 is a schematic structural view of the upper fork assembly of the present invention;
FIG. 3 is a schematic structural view of a center fork assembly according to the present invention;
FIG. 4 is a front view of the center fork assembly of the present invention;
FIG. 5 is a schematic structural view of a lower fork assembly according to the present invention;
FIG. 6 is a schematic structural view of a tensioner assembly of the present invention;
FIG. 7 is a schematic diagram of the roller force analysis of the extra heavy duty telescopic fork of the present invention;
FIG. 8 is a load analysis diagram of the extra heavy duty telescopic fork of the present invention;
FIG. 9 is a first schematic structural diagram of a driving assembly according to the present invention;
FIG. 10 is a second schematic structural view of a driving assembly according to the present invention;
FIG. 11 is a third schematic structural view of a driving assembly according to the present invention;
FIG. 12 is a fourth schematic structural view of a driving assembly according to the present invention;
FIG. 13 is a fifth schematic structural view of a drive assembly according to the present invention;
FIG. 14 is a sixth schematic structural view of a drive assembly according to the present invention;
FIG. 15 is a seventh schematic structural view of a drive assembly according to the present invention;
FIG. 16 is an eighth schematic structural view of a drive assembly according to the present invention;
FIG. 17 is a schematic representation of a gear hub according to the present invention;
FIG. 18 is a schematic view of a long pinion assembly according to the present invention;
FIG. 19 is a schematic structural view of a short pinion assembly according to the present invention;
FIG. 20 is a schematic view of a bull gear shaft assembly according to the present invention;
fig. 21 is a schematic diagram of the upper fork assembly, the fly chain and the lower fork assembly of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example one
The overload telescopic pallet fork shown in fig. 1 comprises an upper fork assembly 10, a middle fork assembly 20, a lower fork assembly 30, a driving assembly 40 and a tensioner assembly 50, wherein the driving assembly 40 and the tensioner assembly 50 are both arranged on the lower fork assembly 30, the driving assembly 40 is connected with the middle fork assembly 20, the upper fork assembly 10 is connected with the middle fork assembly 20, the middle fork assembly 20 is connected with the lower fork assembly 30, the upper fork assembly 10 is connected with the driving assembly 40 through the middle fork assembly 20 and the tensioner assembly 50, and the upper fork assembly 10, the middle fork assembly 20 and the lower fork assembly 30 can be sequentially unfolded.
As shown in fig. 2, the upper fork assembly 10 includes an upper fork attachment tool 101, a heat insulation plate 102, an upper fork upper plate 103, two upper fork side plates 104 symmetrically arranged and a set of upper fork roller assemblies 105, the two upper fork side plates 104 symmetrically arranged are connected in parallel, the upper ends of the two upper fork side plates 104 symmetrically arranged are fixedly connected with the upper fork upper plate 103, the two upper fork side plates 104 symmetrically arranged and the upper fork upper plate 103 are arranged in a "T" shape, the heat insulation plate 102 is fixedly arranged on the upper end surface of the upper fork upper plate 103, the upper fork attachment tool 101 is fixedly arranged on the heat insulation plate 102, a set of upper fork roller assemblies 105 is arranged on the outer side wall of the upper fork side plate 104, a set of upper fork roller assemblies 105 on the same side wall of the upper fork side plate 104 are on the same straight line, and a set of upper fork roller assemblies 105 and the upper fork roller assemblies 20 are in rolling connection. A V-shaped groove 106 is formed on the upper end surface of the upper fork attachment tool 101.
The middle fork assembly 20 shown in fig. 3 and 4 includes a middle fork 201, a set of upper fork guide wheels 202, a sprocket wheel assembly 203, two middle fork drive racks 204 symmetrically arranged, and a set of upper fork support wheels 205, wherein the middle fork 201 is rectangular, an upper fork roller track groove 206 is formed on the upper end surface of the middle fork 201 along the length direction, the cross section of the upper fork roller track groove 206 is in an inverted "convex" shape, a set of upper fork roller assemblies 105 on the outer side walls of the upper fork side plates 104 are arranged in the upper fork roller track groove 206, and a set of upper fork roller assemblies 105 and the upper fork roller track groove 206 are in rolling connection, lower fork roller grooves 207 are formed on the two side walls of the middle fork 201 along the length direction, the cross section of the lower fork roller track groove 207 is rectangular, rollers on the lower fork assembly 30 and the lower fork roller track groove 207 are in rolling connection, a set of upper fork guide wheels 202 and a set of upper fork support wheels 205 are arranged on the upper end surface of the middle fork 201 near the edge, the group of upper fork guide wheels 202 and the group of upper fork support wheels 205 on the same side of the middle fork 201 are positioned on the same straight line, the upper fork upper plate 103 is in rolling connection with the group of upper fork guide wheels 202 and the group of upper fork support wheels 205, the sprocket wheel assembly 203 is arranged in the middle fork 201, a rectangular groove is formed in the lower end portion of the middle fork 201, and the two symmetrically-arranged middle fork drive racks 204 are oppositely arranged on the inner wall of the rectangular groove. The two side walls of the middle fork 201 in the length direction are both provided with a limiting block groove 208 and a shaking limiting groove 209, and the limiting block groove 208 can limit the middle fork 201.
The lower fork assembly 30 shown in fig. 5 includes two symmetrically disposed lower forks 301, a set of middle fork guide roller assemblies 302, a set of middle fork supporting eccentric wheel assemblies 303 and a mounting plate assembly 304, the lower end portions of the two symmetrically disposed lower forks 301 are fixedly disposed on the mounting plate assembly 304, the cross section formed by the two symmetrically disposed lower forks 301 and the mounting plate assembly 304 is U-shaped, a set of middle fork guide roller assemblies 302 are disposed on the opposite inner walls of the lower forks 301, the set of middle fork guide roller assemblies 302 are on the same straight line, the set of middle fork guide roller assemblies 302 are disposed in the lower fork roller track groove 207, and a set of middle fork guide roller assemblies 302 and the lower fork roller track groove 207 are in rolling connection, the set of middle fork supporting eccentric wheel assemblies 303 are disposed on the upper end surface of the mounting plate assembly 304, and the set of middle fork supporting eccentric wheel assemblies 303 are located at four corner positions of the rectangular cross section, the lower end face of the middle fork 201 is in rolling connection with a group of middle fork supporting eccentric wheel assemblies 303, the driving assembly 40 is arranged on the outer wall of one of the two symmetrically arranged lower forks 301, the tensioner assembly 50 is arranged on the mounting plate assembly 304, the inner wall of the lower fork 301 is provided with a limiting screw 305 and a group of central line limiting rollers 306, the limiting screw 305 is arranged in a limiting block groove 208, the group of central line limiting rollers 306 is arranged in a shaking limiting groove 209, and the group of central line limiting rollers 306 and the shaking limiting groove 209 are in rolling connection.
The tensioner assembly 50 shown in fig. 6 comprises a fixed block assembly 501, a tensioner assembly 502, a stop 503 and a fly chain 504, wherein the fixed block assembly 501 is fixedly arranged on the upper fork assembly 10, the tensioner assembly 502 is fixedly arranged on the lower fork assembly 30, the stop 503 is arranged on the tensioner assembly 502, the stop 503 is in contact with the fly chain 504, the fly chain 504 is connected with the upper fork assembly 10, the other end of the fly chain 504 is connected with the lower fork assembly 30, and the fly chain 504 is wound on the fly chain wheel assembly 203 of the middle fork assembly 20, and in combination with the principle of a movable pulley, when the middle fork assembly 20 extends, the fly chain moves corresponding to the movable pulley, and when the upper fork assembly 10 is pulled out as a free end by the fly chain 504 (see the principle of fig. 21).
Force analysis of the roller as shown in fig. 7:
the wheel is subjected to stress analysis, and the load of the wheel at a stress point has the following characteristics, as shown in the following figure.
At the stage T1, the wheel stretches out in no-load mode, but the upper fork is still in the range of the lower fork, the stress change of the wheels at each stress point is small, and the load is P1;
at the stage of T2, extending continuously, wherein the existing part of the upper fork is out of the range of the lower fork, and the part of the upper fork is more and more out of the range of the lower fork, and the load on each wheel is more and more according to the characteristics of the cantilever beam until the maximum load is reached when the upper fork extends out to the maximum, and at the moment, the load reaches P2;
at the stage of T3, the telescopic fork extends out to the longest extension position, at the moment, a stacker attached to the telescopic fork adjusts the whole telescopic fork to ascend for a certain distance, the upper fork supports and takes goods from the bottom until the goods or goods trays leave the goods shelf, at the moment, the load on the wheel at the stress point is increased sharply, and the maximum value P4 is reached quickly;
at stage T4, the telescopic fork is retracted, and the upper fork part is still outside the lower fork range, but the part outside the lower fork range is less and less, so that the load on each wheel is gradually reduced until the load of each stress point returns to a smaller value P3 when the upper fork returns to the lower fork range;
and in the stage T5, in the process of telescopic fork return, the upper fork part is completely within the range of the lower fork, the load of each stress point is not changed obviously, and the load is P3.
T6, T7, and T8 are load extensions of the telescopic fork, and may be regarded as reverse actions of T2, T3, and T4, and the process of load change is also opposite, and will not be described again.
In conclusion, the stress condition of the roller is preferably checked in a variable load mode, so that the actual working condition is closer to the actual working condition; however, in order to simplify the calculation, some safety margin is also provided at the same time, and the service life of the roller is checked by adopting the working condition that the upper fork extends to the maximum (the stress of the roller is the maximum), as shown in fig. 8.
F1And F2Load between the upper fork assembly 10 and the middle fork assembly 20, respectively, F3And F4Load between the center fork assembly 20 and the lower fork assembly 30:
for the application scenario of the present invention,
f1 and F2 are calculated, the middle fork and the lower fork are regarded as a whole,
to calculate the moment from 2 points should
For 1 point to calculate the moment, should be
Because there are 4 rollers with 130mm diameter at point 1 and 2 rollers with 130mm diameter at point 2, the load of the single roller at point 1 and point 2 is 73.04kN and 40.08kN respectively.
When F3 and F4 are calculated, the upper fork and the middle fork are taken as a whole, and the loads of the single roller at 3 and 4 points can be respectively 105kN and 99 kN.
To solve the moment at 4 points, should
To calculate the moment from 3 points should
Since there are 6, 4 rollers with a diameter of 150mm at points 3, 4, respectively, the load of the single roller at points 3, 4 is 106.75kN, 99.13kN, respectively.
The data and the running speed of the upper fork relative to the middle fork are 15 m/min; and the running speed of the middle fork relative to the lower fork is 15 m/min.
In the application scenario of the invention, the action time of the telescopic fork accounts for 29% of the working time of the whole stacker, and the load action time of the telescopic fork accounts for 33% of the total running time of the telescopic fork, so that the load working time of the telescopic fork is 29% x33% approximately equal to 10%, and the service life of the bearing can be calculated as follows:
1. basic rated life formula of radial roller bearing: (ii) a
2、L10: basic rated life, million revolutions;
3、Cr: radial basic dynamic load rating, N;
4、Pr: radial equivalent dynamic load, N;
the service life of the roller is checked, the service life of bearings at all positions is more than 10 years, and the design requirements are met.
Example two
The driving assembly 40 shown in fig. 9-16 includes a base 1, a motor 2, a motor support 3, a rotating shaft 4, a motor end sprocket 5, a transmission chain 6, a driving end sprocket 7, a set of adjusting bolts 8 and a set of connecting bolts 9, wherein the rotating shaft 4 is disposed on the base 1, one end of the motor support 3 is hinged to the base 1 through the rotating shaft 4, the motor 2 is fixedly disposed on the motor support 3, the motor end sprocket 5 is connected to the rotating shaft of the motor 2, the motor end sprocket 5 is connected to the driving end sprocket 7 through the transmission chain 6, the driving end sprocket 7 is disposed on the base 1 through the rotating shaft, the set of adjusting bolts 8 passes through the motor support 3 and is in threaded connection with the base 1, the set of connecting bolts 9 passes through the motor support 3 and is in threaded connection with the base 1, the set of adjusting bolts 8 and the set of connecting bolts 9 are both located on one side of the motor support 3 away from the rotating shaft 4, the lower end of the base 1 is provided with a gear shaft support 12, the gear shaft support 12 is provided with a gear shaft, and the end part of the gear shaft extending out of the base 1 is connected with the driving end chain wheel 7.
The gear and pinion shaft shown in fig. 17-20 comprises a long gear shaft assembly 131, a short gear shaft assembly 132 and two symmetrically arranged large gear shaft assemblies 133, wherein the two symmetrically arranged large gear shaft assemblies 133 are respectively positioned at two sides of the short gear shaft assembly 132, the long gear shaft assembly 131 comprises a gear shaft 13 and two symmetrically arranged first gears 134, the short gear shaft assembly 132 comprises a short gear shaft 135 and two symmetrically arranged second gears 136, the large gear shaft assembly 133 comprises a large gear shaft 137 and two symmetrically arranged large gears 138, the gear shaft 13, the gear shaft 135 and the large gear shaft 137 are arranged in parallel, the two symmetrically arranged first gears 134, the two symmetrically arranged second gears 136 and the two symmetrically arranged large gears 138 are arranged in a one-to-one correspondence manner, the first gears 134 are meshed with the large gears 138, and the large gears 138 are meshed with the second gears 136, the bull gear 138 is engaged with the mid-fork drive rack 204.
In addition, a group of kidney-shaped holes 31 are formed in the motor support 3, the group of kidney-shaped holes 31 and the group of connecting bolts 9 are arranged in a one-to-one correspondence manner, and the connecting bolts 9 penetrate through the kidney-shaped holes 31 to be in threaded connection with the base 1. A washer 10 is arranged between the nut of the connecting bolt 9 and the motor bracket 3, and the washer 10 is a C-shaped conical washer and a D-shaped conical washer of DIN 6319. In order to make the connecting screw 9 screwable, in particular C-and D-cone washers (used in pairs) of DIN 6319 are used to compensate for the effect of the inclined surface, so that the connecting screw can also be locked at the inclined surface, since the motor mount 3 is inclined when the drive chain is tensioned during the actual screwing process of the connecting screw 9.
In the above structure, motor support 3 includes the pivot connecting plate 33 that motor fixed mounting panel 32 and two symmetries set up, the pivot connecting plate 33 that motor fixed mounting panel 32 and two symmetries set up is the setting of U type to the one end and the motor fixed mounting panel 32 fixed connection of the pivot connecting plate 33 that two symmetries set up, motor 2 is fixed to be set up on motor fixed mounting panel 32, a set of waist type hole 31 sets up on motor fixed mounting panel 32, a pot head that motor fixed mounting panel 32 was kept away from to pivot connecting plate 33 is established on rotation axis 4. The two ends of the rotating shaft 4 extending out of the rotating shaft connecting plate 33 are provided with split pins 34. The motor fixing and mounting plate 32 is located below the base 1, and the motor 2 is fixedly arranged on the lower end face of the motor fixing and mounting plate 32.
In addition, the lower end of the base 1 is provided with a rotating shaft support 11, the rotating shaft 4 is arranged on the rotating shaft support 11, and the rotating shaft 4 is rotatably connected with the rotating shaft support 11. The lower end of the base 1 is provided with a gear shaft bracket 12.
Through loosening the adjusting bolt 8 and the connecting bolt 9, the motor 2 drives the motor support 3 to rotate around the rotating shaft 4 under the action of gravity, the motor end chain wheel 5 is driven to move by the movement of the motor 2 to tension the transmission chain 6, and the connecting bolt 9 is screwed down after the transmission chain 6 is tensioned in place, so that the assembly difficulty is reduced, and the tensioning is convenient to adjust.
After the driving assembly 40 is started in the forward direction, the super-heavy-load telescopic pallet fork drives the long gear shaft assembly 131 to rotate through the transmission assembly; the large gear shaft assembly 133 is meshed with the long gear shaft assembly 131 and the short gear shaft assembly 132 and rotates in sequence; the large gear shaft assembly 133 is meshed with a middle fork driving rack 204 in the middle fork assembly 20, so that the middle fork assembly 20 is pushed to extend; when the middle fork assembly 20 is extended, the side flying chain 504 is tensioned to push the upper fork assembly 10 out. Because the rollers of the upper fork assembly 10 run on the upper fork roller track groove 206 and the rollers of the lower fork assembly 30 run on the lower fork roller track groove 207, the upper and lower limit is realized, and the functions of stably extending, picking, stacking and returning are realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The utility model provides a flexible fork of overweight load which characterized in that: including last fork subassembly (10), well fork subassembly (20), lower fork subassembly (30), drive assembly (40) and tensioning ware subassembly (50) all set up on lower fork subassembly (30) to drive assembly (40) and well fork subassembly (20) are connected, go up fork subassembly (10) and well fork subassembly (20) and be connected, well fork subassembly (20) and lower fork subassembly (30) are connected, go up fork subassembly (10) and be connected with drive assembly (40) through well fork subassembly (20) and tensioning ware subassembly (50), go up fork subassembly (10), well fork subassembly (20) and lower fork subassembly (30) and can launch in proper order.
2. The extra heavy duty telescopic pallet fork of claim 1, wherein: the upper fork assembly (10) comprises an upper fork auxiliary tool (101), a heat insulation plate (102), an upper fork upper plate (103), two symmetrically arranged upper fork side plates (104) and a group of upper fork roller assemblies (105), the two symmetrically arranged upper fork side plates (104) are connected together in parallel, the upper end parts of the two symmetrically arranged upper fork side plates (104) are fixedly connected with the upper fork upper plate (103), the two symmetrically arranged upper fork side plates (104) and the upper fork upper plate (103) are arranged in a T shape, the heat insulation plate (102) is fixedly arranged on the upper end surface of the upper fork upper plate (103), the upper fork auxiliary tool (101) is fixedly arranged on the heat insulation plate (102), the outer side wall of each upper fork side plate (104) is provided with the group of upper fork roller assemblies (105), the group of upper fork roller assemblies (105) on the same side wall of the upper fork side plates (104) are positioned on the same straight line, the group of upper fork roller assemblies (105) is connected with the middle fork assembly (20) in a rolling mode.
3. The extra heavy duty telescopic pallet fork of claim 2, wherein: and a V-shaped groove (106) is formed in the upper end face of the upper fork auxiliary tool (101).
4. The extra heavy duty telescopic pallet fork of claim 2, wherein: the middle fork assembly (20) comprises a middle fork (201), a group of upper fork guide wheels (202), a sprocket wheel assembly (203), two middle fork driving racks (204) which are symmetrically arranged, and a group of upper fork supporting wheels (205), wherein the middle fork (201) is arranged in a rectangular body, an upper fork roller track groove (206) is formed in the upper end surface of the middle fork (201) along the length direction, the cross section of the upper fork roller track groove (206) is arranged in an inverted convex shape, a group of upper fork roller assemblies (105) on the outer side wall of an upper fork side plate (104) are arranged in the upper fork roller track groove (206), a group of upper fork roller assemblies (105) are in rolling connection with the upper fork roller track groove (206), lower fork roller track grooves (207) are formed in the two side walls of the length direction of the middle fork (201), the cross section of the lower fork roller track grooves (207) is rectangular, and rollers on the lower fork assembly (30) are in rolling connection with the lower fork roller track grooves (207), the utility model discloses a fork structure, including well fork (201), well fork (201) up end all is equipped with a set of fork leading wheel (202) and a set of fork supporting wheel (205) on being close to the border position, go up fork (201) go up a set of fork leading wheel (202) and a set of fork supporting wheel (205) and be in same straight line with a set of fork leading wheel (202) and a set of fork supporting wheel (205) on one side, fly sprocket assembly (203) and set up in well fork (201), the lower tip of well fork (201) is equipped with the rectangle recess, well fork drive rack (204) that two symmetries set up relatively on the inner wall of rectangle recess.
5. The telescopic pallet fork of claim 4, wherein: the two side walls of the middle fork (201) in the length direction are provided with limiting block grooves (208) and rocking limiting grooves (209), and the limiting block grooves (208) can limit the middle fork (201).
6. The extra heavy duty telescopic pallet fork of claim 4, wherein: the lower fork assembly (30) comprises two symmetrically arranged lower forks (301), a group of middle fork guide roller assemblies (302), a group of middle fork supporting eccentric wheel assemblies (303) and a mounting plate assembly (304), the lower end parts of the two symmetrically arranged lower forks (301) are fixedly arranged on the mounting plate assembly (304), the cross section formed by the two symmetrically arranged lower forks (301) and the mounting plate assembly (304) is U-shaped, the inner walls opposite to the lower forks (301) are respectively provided with the group of middle fork guide roller assemblies (302), the group of middle fork guide roller assemblies (302) are positioned on the same straight line, the group of middle fork guide roller assemblies (302) are arranged in a lower fork roller track groove (207), the group of middle fork guide roller assemblies (302) are connected with the lower fork roller track groove (207) in a rolling manner, the group of middle fork supporting eccentric wheel assemblies (303) are arranged on the upper end surface of the mounting plate assembly (304), and a group of middle fork supporting eccentric wheel assemblies (303) are positioned at four corner positions of the rectangular cross section, the lower end surface of the middle fork (201) is in rolling connection with the group of middle fork supporting eccentric wheel assemblies (303), the driving assembly (40) is arranged on the outer wall of one of the two symmetrically arranged lower forks (301), the tensioner assembly (50) is arranged on the mounting plate assembly (304), the inner wall of the lower fork (301) is provided with a limit screw (305) and a group of midline limit rollers (306), the limit screw (305) is arranged in a limit stopper groove (208), the group of midline limit rollers (306) is arranged in the shaking limit groove (209), and the group of midline limit rollers (306) and the shaking limit groove (209) are in rolling connection.
7. The extra heavy duty telescopic pallet fork of claim 6, wherein: the driving assembly (40) comprises a base (1), a motor (2), a motor support (3), a rotating shaft (4), a motor end chain wheel (5), a transmission chain (6), a driving end chain wheel (7), a group of adjusting bolts (8) and a group of connecting bolts (9), wherein the rotating shaft (4) is arranged on the base (1), one end of the motor support (3) is hinged with the base (1) through the rotating shaft (4), the motor (2) is fixedly arranged on the motor support (3), the motor end chain wheel (5) is connected with a rotating shaft of the motor (2), the motor end chain wheel (5) is connected with the driving end chain wheel (7) through the transmission chain (6), the driving end chain wheel (7) is arranged on the base (1) through the rotating shaft, and the group of adjusting bolts (8) penetrates through the motor support (3) and is in threaded connection with the base (1), the group of connecting bolts (9) penetrate through the motor support (3) and are in threaded connection with the base (1), the group of adjusting bolts (8) and the group of connecting bolts (9) are located on one side, far away from the rotating shaft (4), of the motor support (3), a gear shaft support (12) is arranged at the lower end of the base (1), a gear shaft is arranged on the gear shaft support (12), and the end, extending out of the base (1), of the gear shaft is connected with the driving end chain wheel (7).
8. The extra heavy duty telescopic pallet fork of claim 7, wherein: the gear and gear shaft includes long gear shaft subassembly (131), short gear shaft subassembly (132) and two symmetrical bull gear shaft subassembly (133) that set up, bull gear shaft subassembly (133) that two symmetries set up are located the both sides of short gear shaft subassembly (132) respectively, long gear shaft subassembly (131) includes gear shaft (13) and two symmetrical gear one (134) that set up, short gear shaft subassembly (132) includes short gear shaft (135) and two symmetrical gear two (136) that set up, bull gear shaft subassembly (133) includes bull gear shaft (137) and two symmetrical bull gear (138) that set up, gear shaft (13), gear shaft (135) and bull gear shaft (137) parallel arrangement, two symmetrical gear one (134) that set up, two symmetrical gear two (136) that set up and two symmetrical bull gear (138) one-to-one setting that set up, the first gear (134) is meshed with the large gear (138), the large gear (138) is meshed with the second gear (136), and the large gear (138) is meshed with the middle fork driving rack (204).
9. The extra heavy duty telescopic pallet fork of claim 1, wherein: the tensioner assembly (50) comprises a fixed block assembly (501), a tensioner assembly (502), a stop block (503) and a flying chain (504), wherein the fixed block assembly (501) is fixedly arranged on the upper fork assembly (10), the tensioner assembly (502) is fixedly arranged on the lower fork assembly (30), the stop block (503) is arranged on the tensioner assembly (502), the stop block (503) is in contact with the flying chain (504), and the flying chain (504) is connected with the upper fork assembly (10).
10. The method of calculating the load of an overloaded telescopic fork according to any one of claims 1 to 9, wherein: f1And F2Respectively, between the upper fork assembly (10) and the middle fork assembly (20), F3And F4Load between the middle fork assembly (20) and the lower fork assembly (30), respectively:
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| CN202111605025.0A CN114516605B (en) | 2021-12-25 | 2021-12-25 | Overload telescopic fork and load calculation method thereof |
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| CN202111605025.0A CN114516605B (en) | 2021-12-25 | 2021-12-25 | Overload telescopic fork and load calculation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115285896A (en) * | 2022-09-30 | 2022-11-04 | 江苏豹翔智能科技有限公司 | Fork structure for three-dimensional storage of transport goods |
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| CN114516605B (en) | 2023-11-24 |
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