CN114516605B - Overload telescopic fork and load calculation method thereof - Google Patents
Overload telescopic fork and load calculation method thereof Download PDFInfo
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- CN114516605B CN114516605B CN202111605025.0A CN202111605025A CN114516605B CN 114516605 B CN114516605 B CN 114516605B CN 202111605025 A CN202111605025 A CN 202111605025A CN 114516605 B CN114516605 B CN 114516605B
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Classifications
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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
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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
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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
- B66F9/20—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
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Abstract
The invention discloses an overweight telescopic fork and a load calculating method, comprising 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, 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 aiming at an aluminum coil, and the V-shaped telescopic fork does not need a traditional tray and does not hurt the surface of the aluminum coil by taking goods from the V-shaped surface. The telescopic fork has compact structure and good mechanical property; for adapting to the heavy load, the left-right limiting mode is optimized, the traditional nylon guide block is changed into the guide wheel assembly and the roller assembly, the sliding is changed into rolling, the strength is higher, and the abrasion is less.
Description
Technical Field
The invention belongs to the technical field of advanced production and manufacturing and automation, and particularly relates to an overweight telescopic fork. The invention also relates to a load calculation method of the overweight telescopic fork.
Background
As is known, a telescopic fork consists of a fixed lower base and one or more superimposed extensible members which move in a bi-directional telescopic manner in order to move the load. The number of moving telescoping members (two, three or four) is selected to fit 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. Currently, single-extension-position telescopic forks are commonly used in the market, and the picking process comprises the following steps: the chain is used for directly driving the telescopic fork, or the rack-and-pinion structure is used for driving the telescopic fork 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 out, the telescopic fork is contracted. The telescopic fork has the advantages of simple telescopic process, small telescopic quantity, small goods taking range and low space utilization rate. The double-extension telescopic fork has the advantage of large extension amount, but has a complex chain transmission structure and is inconvenient to install and maintain.
Especially for heavier goods, the single-extension-position telescopic fork and the double-extension-position telescopic fork have the defects of complex structure and high price, and are not economical and practical when the size and the weight of the stored goods are small.
Disclosure of Invention
The invention aims to: in order to overcome the defects, the invention aims to provide the overload telescopic fork, so that the problems of unreasonable structure, great self weight and the like in the original telescopic fork are solved to a certain extent when the telescopic fork in the prior art is used for carrying heavy goods, and the safety and the practicability are limited when the telescopic fork is used for storing and taking the goods; meanwhile, the structure is still not compact, and the structure is not suitable for the load of heavier goods.
The technical scheme is as follows: the utility model provides an overweight flexible fork, includes fork subassembly, well fork subassembly, lower fork subassembly, actuating assembly and tensioning ware subassembly all set up on lower fork subassembly to actuating 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 fork subassembly and be connected with actuating assembly through well fork subassembly and tensioning ware subassembly, go up fork subassembly, well fork subassembly and lower fork subassembly and can expand in proper order. The invention provides a V-shaped telescopic fork aiming at an aluminum coil, and the V-shaped telescopic fork does not need a traditional tray and does not hurt the surface of the aluminum coil by taking goods from the V-shaped surface. The telescopic fork has compact structure and good mechanical property.
Further, the telescopic fork of overload load, go up fork subassembly including the appurtenance that goes up fork, heat insulating board, go up fork upper plate, two upper fork curb plates and a set of upper fork roller assembly that the symmetry set up, two upper fork curb plates that the symmetry set up are connected together side by side to the upper end and the upper fork upper plate fixed connection of upper fork curb plate that the two symmetries set up, two upper fork curb plates that the symmetry set up are "T" style of calligraphy setting with the upper fork upper plate, the heat insulating board is fixed to be set up on the up end of upper fork upper plate, it is fixed to set up on the heat insulating board to go up fork appurtenance, all be equipped with a set of upper fork roller assembly on the lateral wall of upper fork curb plate, a set of upper fork roller assembly on the same lateral wall of upper fork curb plate is in same straight line, a set of upper fork roller assembly and well fork subassembly roll connection.
Furthermore, in the overload telescopic fork, the V-shaped groove is formed in the upper end face of the upper fork auxiliary tool.
Further, the above-mentioned flexible fork of overload load, well fork subassembly includes well fork, a set of guide pulley that goes up, chain wheel subassembly, two well fork drive racks and a set of fork supporting wheel that the symmetry set up, well fork is the cuboid setting, well fork up end is equipped with fork gyro wheel rail groove along length direction, go up fork gyro wheel rail groove's cross-section and be "protruding" word setting for reversing, go up fork gyro wheel subassembly setting on the lateral wall of curb plate of a set of and go up fork gyro wheel rail inslot to fork gyro wheel subassembly and last fork gyro wheel rail groove roll connection on a set of, all be equipped with fork gyro wheel rail groove down on the both sides wall of well fork length direction, the cross-section in fork gyro wheel rail groove is the rectangle down, gyro wheel and fork gyro wheel rail groove roll connection down on the fork subassembly, well fork up end is close to the edge position and all is equipped with fork guide pulley and a set of going up fork gyro wheel rail groove on a set of fork, fork up on the same one set of side and go up fork supporting wheel rail groove is in same straight line, set up fork guide pulley and the setting up the rectangle sprocket and sets up the recess in the recess, set up the opposite side of chain wheel groove sets up in the rectangle sprocket.
Further, the above-mentioned flexible fork of overload, all be equipped with limit stop groove and rock spacing recess on the both sides wall of well fork length direction, limit stop groove can carry out the spacing of well fork.
Further, the above-mentioned overload telescopic fork, fork subassembly includes fork, a set of fork guide roller subassembly, a set of fork support eccentric wheel subassembly and mounting panel subassembly in fork, the lower tip of fork that two symmetries set up is all fixed to be set up on the mounting panel subassembly to the cross-section that fork and mounting panel subassembly constitute in two symmetries sets up is the U type, all be equipped with fork guide roller subassembly in a set of on the relative inner wall of fork down, fork guide roller subassembly is in on same straight line in a set of, fork guide roller subassembly sets up in fork roller rail inslot down to fork guide roller subassembly and fork roller rail groove roll connection down in a set of, fork support eccentric wheel subassembly sets up on the up end of mounting panel subassembly in a set of, and fork support eccentric wheel subassembly is located four angular position departments of rectangular cross-section, fork support eccentric wheel subassembly roll connection in the lower end face and the set of fork, drive assembly sets up on the outer wall of fork wherein that two symmetries set up, limit screw sets up limit screw in the limit screw, limit screw is set up in the limit groove, limit screw is set up to the limit screw in the limit.
Further, the above-mentioned flexible fork of overload load, drive assembly includes base, motor support, rotation axis, motor end sprocket, drive chain, drive end sprocket, a set of adjusting bolt and a set of connecting bolt, the rotation axis sets up on the base, the one end of motor support is articulated through rotation axis and base, the motor is fixed to be set up on the motor support, motor end sprocket is connected with the pivot of motor, motor end sprocket passes through drive chain and drive end sprocket to be connected, drive end sprocket passes through the pivot setting on the base, a set of adjusting bolt passes motor support and base threaded connection, a set of connecting bolt passes motor support and base threaded connection, a set of adjusting bolt and a set of connecting bolt all are located one side that the rotation axis was kept away from to the motor support, the lower tip of base is equipped with the gear shaft support, the gear shaft is equipped with the gear shaft on the gear shaft support, the gear shaft stretches out the tip and the drive end sprocket connection of base.
Further, the above-mentioned overload telescopic fork, the gear tooth shaft includes long gear shaft subassembly, short gear shaft subassembly and two symmetrical pinion shaft subassemblies that set up, two symmetrical pinion shaft subassemblies that set up are located the both sides of short gear shaft subassembly respectively, long gear shaft subassembly includes gear shaft and two symmetrical gear first that set up, short gear shaft subassembly includes short gear shaft and two symmetrical gear second that set up, pinion shaft subassembly includes the pinion shaft and two symmetrical pinion that set up, gear shaft and pinion shaft parallel arrangement, two symmetrical gear first that set up, two symmetrical gear second and two symmetrical pinion one-to-one that set up, gear first and pinion engagement, pinion and two meshing of gear, pinion and middle fork drive rack meshing.
Further, the above-mentioned flexible fork of overload, the tensioning ware subassembly includes fixed block subassembly, tensioning ware subassembly, dog and flying chain, the fixed block subassembly is fixed to be set up on last fork subassembly, the tensioning ware subassembly is fixed to be set up on lower fork subassembly, the dog setting is on the tensioning ware subassembly to the dog contacts with the flying chain, the flying chain is connected with last fork subassembly.
The invention also provides a load calculation method of the overload telescopic fork, F 1 And F 2 The loads between the upper fork assembly and the middle fork assembly are respectively F 3 And F 4 The loads between the middle fork assembly and the lower fork assembly are respectively:
the technical scheme can be seen that the invention has the following beneficial effects: the overload telescopic fork has the following advantages:
1. the V-shaped plate is contacted with the goods, so that cylindrical goods can be supported.
2. For adapting to the heavy load, the left-right limiting mode is optimized, the traditional nylon guide block is changed into the guide wheel assembly and the roller assembly, the sliding is changed into rolling, the strength is higher, and the abrasion is less.
3. Because the motor mass is about 150kg, the mode of tensioning the roller chain by using the bolt top when the traditional transverse hanging motor is abandoned is changed into the mode of tensioning by using the dead weight of the motor. Specific embodiments are described in the application of the invention, which is also incorporated herein by reference.
4. The double-row gears are used for transmission in the power transmission process, the strength is reliable, space is reserved for the flying chain, and the structure is compact.
5. The middle fork is changed into an assembled type from an integral type, so that the difficulty in processing and transportation is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of an overload telescoping fork according to the present invention;
FIG. 2 is a schematic view of the structure of the fork assembly according to the present invention;
FIG. 3 is a schematic view of a fork assembly according to the present invention;
FIG. 4 is a front view of a fork assembly according to the present invention;
FIG. 5 is a schematic view of a fork assembly according to the present invention;
FIG. 6 is a schematic view of a tensioner assembly of the present invention;
FIG. 7 is a schematic diagram of the roller force analysis of the overload telescoping fork according to the present invention;
FIG. 8 is a load analysis chart of an overload telescoping fork according to the present invention;
FIG. 9 is a schematic diagram of a driving assembly according to the present invention;
FIG. 10 is a schematic diagram of a driving assembly according to the second embodiment of the present invention;
FIG. 11 is a schematic diagram of a driving assembly according to the present invention;
FIG. 12 is a schematic diagram of a driving assembly according to the present invention;
FIG. 13 is a schematic diagram of a driving assembly according to the present invention;
FIG. 14 is a schematic diagram of a driving assembly according to the present invention;
FIG. 15 is a schematic diagram of a driving assembly according to the present invention;
FIG. 16 is a schematic view of a driving assembly according to the present invention;
FIG. 17 is a schematic view of the structure of the gear shaft according to the present invention;
FIG. 18 is a schematic view of a long gear shaft assembly according to the present invention;
FIG. 19 is a schematic view of the configuration of the stub gear shaft assembly of the present invention;
FIG. 20 is a schematic view of the structure of the large gear shaft assembly of the present invention;
fig. 21 is a schematic diagram of an upper fork assembly, a fly chain and a lower fork assembly in accordance with the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1
The overload telescopic fork as 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 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 unfolded in sequence.
The upper fork assembly 10 shown in fig. 2 comprises an upper fork auxiliary tool 101, a heat insulation plate 102, an upper fork upper plate 103, two upper fork side plates 104 which are symmetrically arranged and a group of upper fork roller assemblies 105, wherein the upper fork side plates 104 which are symmetrically arranged are connected in parallel, the upper ends of the upper fork side plates 104 which are symmetrically arranged are fixedly connected with the upper fork upper plate 103, the upper fork side plates 104 which are 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 auxiliary tool 101 is fixedly arranged on the heat insulation plate 102, a group of upper fork roller assemblies 105 are arranged on the outer side walls of the upper fork side plates 104, a 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, and the group of upper fork roller assemblies 105 are in rolling connection with the middle fork assembly 20. The upper end face of the upper fork auxiliary tool 101 is provided with a V-shaped groove 106.
As shown in fig. 3 and 4, the middle fork assembly 20 includes a middle fork 201, a set of upper fork guide wheels 202, a sprocket wheel assembly 203, two symmetrically arranged middle fork driving racks 204 and a set of upper fork support wheels 205, wherein the middle fork 201 is in a rectangular body, an upper fork roller rail groove 206 is arranged on the upper end surface of the middle fork 201 along the length direction, the cross section of the upper fork roller rail groove 206 is in an inverted-convex shape, a set of upper fork roller assemblies 105 on the outer side wall of the upper fork side plate 104 are arranged in the upper fork roller rail groove 206, the set of upper fork roller assemblies 105 and the upper fork roller rail groove 206 are in rolling connection, two side walls of the middle fork 201 along the length direction are respectively provided with a lower fork roller rail groove 207, the cross section of the lower fork roller rail groove 207 is rectangular, the upper end surface of the middle fork 201 is close to the edge position and is respectively provided with a set of upper fork guide wheels 202 and a set of upper fork support wheels 205, a set of upper fork guide wheels 202 on the same side of the middle fork 201 and a set of upper fork support wheels 205 are in rolling connection with the rectangular inner wall 103, and the upper fork support wheels 201 are arranged in the same rectangular side of the upper fork assembly and the upper fork assembly is in rolling connection with the rectangular side plate 201, and the upper fork assembly is provided with a set of upper fork support wheels 201 and a set of upper fork support wheels 201 is in rolling connection with a set of rectangular upper fork assembly. Both side walls of the middle fork 201 in the length direction are respectively provided with a limit stop groove 208 and a shaking limit groove 209, and the limit stop grooves 208 can limit the middle fork 201.
The lower fork assembly 30 shown in fig. 5 comprises two lower forks 301 symmetrically arranged, a group of middle fork guide roller assemblies 302, a group of middle fork support eccentric wheel assemblies 303 and a mounting plate assembly 304, wherein the lower end parts of the two lower forks 301 symmetrically arranged are fixedly arranged on the mounting plate assembly 304, the cross sections formed by the two lower forks 301 symmetrically arranged and the mounting plate assembly 304 are U-shaped, a group of middle fork guide roller assemblies 302 are arranged on opposite inner walls of the lower forks 301, 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 in rolling connection with the lower fork roller track groove 207, the group of middle fork support eccentric wheel assemblies 303 are arranged on the upper end surface of the mounting plate assembly 304, the group of middle fork support eccentric wheel assemblies 303 are positioned at four corner positions of a rectangular cross section, the lower end surface of the middle fork 201 is in rolling connection with the group of the middle fork support eccentric wheel assemblies 303, the driving assembly 40 is arranged on the outer wall 306 of the lower fork 301, the lower fork assemblies 306 are arranged on the inner wall of the lower fork assembly, the limit stopper assembly is arranged on the limit stopper assembly 209, and a limit stopper screw is arranged on the limit stopper 209, and a limit stopper is arranged on the limit stopper groove 209.
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, the fly chain 504 is wound on the fly chain wheel assembly 203 of the middle fork assembly 20, and when the middle fork assembly 20 stretches out, the fixed block assembly 501 corresponds to the movable pulley to move, and the upper fork assembly 10 is dragged by the fly chain 504 to stretch out as a free end at the moment (see fig. 21).
Force analysis of the roller as shown in fig. 7:
the roller is subjected to stress analysis, and the load of the roller at the stress point is as follows.
In the stage T1, no load extends out, but the upper fork is still in the lower fork range, the stress change of the wheels at each stress point is small, and the load is P1;
in the T2 stage, the upper fork is extended continuously, but the existing part of the upper fork is out of the lower fork range, and the part out of the lower fork range is more and more, according to the characteristics of the cantilever beam, the load on each wheel is larger and larger until the load reaches the maximum value when the upper fork extends out to the longest, and the load reaches P2;
in the stage T3, the telescopic fork stretches out of the longest stretch, at the moment, the stacker attached to the telescopic fork adjusts the telescopic fork to integrally rise for a certain distance, the upper fork supports the goods from the bottom until the goods or the goods tray leaves the goods shelf, at the moment, the load on the wheels of the stress point is rapidly increased, and the maximum value P4 is reached quickly;
in the stage T4, the telescopic fork is retracted, the upper fork part is still out of the lower fork range, but the parts out of the lower fork range are less and less, so that the load on each wheel is gradually reduced until each stress point is loaded back to a smaller value P3 when the upper fork returns to the lower fork range;
and in the T5 stage, in the telescopic fork return process, the upper fork part is in the lower fork range, the load of each stress point is not obviously changed, and the load size is P3.
T6, T7, T8 are the load extension of flexible fork, can regard as the reverse action of T2, T3, T4, and the change process of load is also opposite, and the description is omitted.
In summary, the stress condition of the roller is preferably calculated and checked in a variable load mode, so that the roller is closer to the actual working condition; however, in order to simplify the calculation, some safety margin is also reserved, and the service life of the roller is checked by adopting the working condition that the upper fork stretches out to the maximum (the stress of the roller is maximum), as shown in fig. 8.
F 1 And F 2 The loads between the upper fork assembly 10 and the middle fork assembly 20, F 3 And F 4 The loads between the middle fork assembly 20 and the lower fork assembly 30, respectively:
for the application scenario of the present invention,
when F1 and F2 are calculated, the middle fork and the lower fork are regarded as a whole,
moment determination of 2 points should be done
Moment of 1 point, should
Since there are 4 rollers 130mm in diameter at point 1 and 2 rollers 130mm in diameter at point 2, the loads of the individual rollers at points 1 and 2 are 73.04kN and 40.08kN, respectively.
When F3 and F4 are calculated, the upper fork and the middle fork are regarded as a whole, and the loads of the single rollers at 3 and 4 points can be obtained by the same method and are 105kN and 99kN respectively.
Moment determination of 4 points should be done
Moment determination of 3 points should be done
Since there are 6 and 4 rollers of 150mm diameter at points 3 and 4, respectively, the loads of the individual rollers at points 3 and 4 are 106.75kn and 99.13kn, respectively.
The data and the running speed of the upper fork relative to the middle fork are 15m/min; and the running speed of the middle fork relative to the lower fork is 15m/min.
In the application scene 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 the load action time of the telescopic fork is 29% x33% ≡10%, and the service life of the available bearing is calculated as follows:
1. basic rated life formula of radial roller bearing: the method comprises the steps of carrying out a first treatment on the surface of the
2、L 10 : basic rated life, millions of revolutions;
3、C r : radial basic rated dynamic load, N;
4、P r : radial equivalent dynamic load, N;
above, check the gyro wheel life-span, bearing life-span in all positions is more than 10 years, accords with the design demand.
Example two
The driving assembly 40 shown in fig. 9-16 comprises 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 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 sprocket 5 is connected with a rotating shaft of the motor 2, the motor end sprocket 5 is connected with the driving end sprocket 7 through the transmission chain 6, the driving end sprocket 7 is arranged on the base 1 through the rotating shaft, the set of adjusting bolts 8 penetrate through the motor support 3 and the base 1 in a threaded manner, the set of connecting bolts 9 penetrate through the motor support 3 and the base 1 in a threaded manner, the set of adjusting bolts 8 and the set of connecting bolts 9 are all located on one side, far away from the rotating shaft 4, a gear shaft support 12 is arranged at the lower end of the base 1, a gear shaft support 12 is arranged on the gear shaft support 12, and the gear shaft extends out of the end of the base 1 and is connected with the driving end sprocket 7.
17-20, the gear tooth axle includes a long gear axle assembly 131, a short gear axle assembly 132 and two symmetrically disposed large gear axle assemblies 133, the two symmetrically disposed large gear axle assemblies 133 are located on two sides of the short gear axle assembly 132, the long gear axle assembly 131 includes a gear axle 13 and two symmetrically disposed first gears 134, the short gear axle assembly 132 includes a short gear axle 135 and two symmetrically disposed second gears 136, the large gear axle assembly 133 includes a large gear axle 137 and two symmetrically disposed large gears 138, the gear axle 13, the gear axle 135 and the large gear axle 137 are disposed in parallel, the two symmetrically disposed first gears 134, the two symmetrically disposed second gears 136 and the two symmetrically disposed large gears 138 are disposed in one-to-one correspondence, the first gears 134 and the large gears 138 mesh, the large gears 138 mesh with the second gears 136, and the large gears 138 mesh with the middle fork drive rack 204.
In addition, a group of waist-shaped holes 31 are formed in the motor support 3, the waist-shaped holes 31 and the connecting bolts 9 are arranged in a one-to-one correspondence mode, and the connecting bolts 9 penetrate through the waist-shaped holes 31 and are 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 allow the connecting bolt 9 to be screwed down, in particular C-shaped and D-shaped conical washers (used in pairs) of DIN 6319 are used to balance the effect of the bevel, since the motor mount 3 is inclined during the actual screwing down of the connecting bolt 9, so that the connecting bolt can also be locked at the bevel.
In the above-mentioned structure, motor support 3 includes motor fixed mounting plate 32 and two pivot connecting plates 33 that the symmetry set up, motor fixed mounting plate 32 and two pivot connecting plates 33 that the symmetry set up are the U type setting to the one end and the motor fixed mounting plate 32 fixed connection of pivot connecting plates 33 that two symmetries set up, motor 2 is fixed to be set up on motor fixed mounting plate 32, a set of waist type hole 31 sets up on motor fixed mounting plate 32, one end cover that motor fixed mounting plate 32 was kept away from to pivot connecting plates 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 cotter 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, a rotation shaft support 11 is provided at the lower end of the base 1, the rotation shaft 4 is provided on the rotation shaft support 11, and the rotation shaft 4 is rotatably connected to the rotation shaft support 11. The lower end of the base 1 is provided with a gear shaft bracket 12.
Through loosening adjusting bolt 8 and connecting bolt 9, motor 2 drives motor support 3 and rotates around rotation axis 4 under the action of gravity this moment, and motor 2's removal drives motor end sprocket 5 and removes, comes tensioning drive chain 6, waits after drive chain 6 tensioning is put in place, screws up connecting bolt 9, has reduced the degree of difficulty of assembly to it is convenient to adjust tensioning.
According to the overload telescopic fork, after the driving assembly 40 is started positively, the long gear shaft assembly 131 is driven to rotate by 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 sequentially rotates; the large gear shaft assembly 133 engages the intermediate fork drive rack 204 in the intermediate fork assembly 20 to push the intermediate fork assembly 20 out; when the middle fork assembly 20 is extended, the side 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 out of the picking, stacking and returning are realized.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.
Claims (7)
1. An overweight telescopic fork, characterized in that: the device 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 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; the upper fork assembly (10) comprises an upper fork auxiliary tool (101), a heat insulating plate (102), an upper fork upper plate (103), two upper fork side plates (104) which are symmetrically arranged and a group of upper fork roller assemblies (105), wherein the upper fork side plates (104) which are symmetrically arranged are connected together in parallel, the upper ends of the upper fork side plates (104) which are symmetrically arranged are fixedly connected with the upper fork upper plate (103), the upper fork side plates (104) which are symmetrically arranged and the upper fork upper plate (103) are arranged in a T shape, the heat insulating plate (102) is fixedly arranged on the upper end face of the upper fork upper plate (103), the upper fork auxiliary tool (101) is fixedly arranged on the heat insulating plate (102), a group of upper fork roller assemblies (105) are arranged on the outer side walls of the upper fork side plates (104), a 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, and the group of upper fork roller assemblies (105) are in rolling connection with the middle fork assemblies (20); the upper end face of the upper fork auxiliary tool (101) is provided with a V-shaped groove (106); the middle fork assembly (20) comprises a middle fork (201), a group of upper fork guide wheels (202), a flywheel assembly (203), two middle fork driving racks (204) which are symmetrically arranged and a group of upper fork support wheels (205), wherein the middle fork (201) is arranged in a rectangular body, an upper fork roller rail groove (206) is arranged on the upper end surface of the middle fork (201) along the length direction, the cross section of the upper fork roller rail groove (206) is arranged in an inverted convex shape, a group of upper fork roller assemblies (105) on the outer side wall of the upper fork side plate (104) are arranged in the upper fork roller rail groove (206), a group of upper fork roller assemblies (105) are in rolling connection with the upper fork roller rail groove (206), two side walls of the middle fork (201) along the length direction are respectively provided with a lower fork roller rail groove (207), the rollers on the lower fork assembly (30) are in rolling connection with the lower fork rail groove (207), the upper end surface of the middle fork (201) is provided with a group of upper fork guide wheels (205) which are close to the upper fork guide wheels (202) and a group of upper fork guide wheels (202) which are in rolling connection with the upper fork guide wheels (202) on one side of the upper fork assembly (202), the chain 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 two symmetrically arranged middle fork driving racks (204) are oppositely arranged on the inner wall of the rectangular groove.
2. The overload telescopic fork according to claim 1, wherein: both side walls of the middle fork (201) in the length direction are provided with limit stop grooves (208) and shaking limit grooves (209), and the limit stop grooves (208) can limit the middle fork (201).
3. The overload telescopic fork according to claim 1, wherein: the lower fork assembly (30) comprises two lower forks (301) which are symmetrically arranged, a group of middle fork guide roller assemblies (302), a group of middle fork guide roller assemblies (303) and a mounting plate assembly (304), wherein the lower ends of the two lower forks (301) which are symmetrically arranged are fixedly arranged on the mounting plate assembly (304), the cross section formed by the two lower forks (301) which are symmetrically arranged and the mounting plate assembly (304) is U-shaped, the opposite inner walls of the lower forks (301) are respectively provided with a 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 the lower fork roller track grooves (207), the group of middle fork guide roller assemblies (302) are in rolling connection with the lower fork roller track grooves (207), the group of middle fork support eccentric wheel assemblies (303) are arranged on the upper end face of the mounting plate assembly (304), the group of middle fork support eccentric wheel assemblies (303) are positioned at four corner positions of the rectangular cross section, the middle fork guide roller assemblies (302) are arranged in the upper end face of the mounting plate assembly (301), the lower fork guide roller assemblies (201) are arranged on the outer wall of the upper tensioning assembly (301), the lower fork assemblies (201) are arranged on the upper end faces of the lower fork assemblies (301) in a rolling way, the inner wall of the lower fork (301) is provided with a limit screw (305) and a group of central line limit rollers (306), the limit screw (305) is arranged in the limit stop groove (208), the group of central line limit rollers (306) is arranged in the shaking limit groove (209), and the group of central line limit rollers (306) are in rolling connection with the shaking limit groove (209).
4. The overload telescopic fork according to claim 1, wherein: the driving assembly (40) comprises a base (1), a motor (2), a motor bracket (3), a rotating shaft (4), a motor end chain wheel (5), a driving 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 bracket (3) is hinged with the base (1) through the rotating shaft (4), the motor (2) is fixedly arranged on the motor bracket (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 driving chain (6), the driving end chain wheel (7) is arranged on the base (1) through the rotating shaft, the group of adjusting bolts (8) penetrate through the motor bracket (3) and the base (1) in a threaded manner, the group of connecting bolts (9) penetrate through the motor bracket (3) and the gear shaft (1) in a threaded manner, the group of adjusting bolts (8) and the group of connecting bolts (9) are both positioned on the motor bracket (3) and the rotating shaft (4) and are arranged on one side, far away from the lower gear (12) of the rotating shaft (4) and the lower end part (12) is arranged on the base (12), the end part of the gear tooth wheel shaft extending out of the base (1) is connected with a driving end chain wheel (7).
5. The overload-type telescopic pallet fork according to claim 4, wherein: the gear tooth axle comprises a long gear axle assembly (131), a short gear axle assembly (132) and two symmetrically arranged large gear axle assemblies (133), the two symmetrically arranged large gear axle assemblies (133) are respectively located on two sides of the short gear axle assembly (132), the long gear axle assembly (131) comprises a gear axle (13) and two symmetrically arranged first gears (134), the short gear axle assembly (132) comprises a short gear axle (135) and two symmetrically arranged second gears (136), the large gear axle assembly (133) comprises a large gear axle (137) and two symmetrically arranged large gears (138), the gear axle (13), the gear axle (135) and the large gear axle (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 one-to-one correspondence, the first gears (134) and the two symmetrically arranged first gears (138) are meshed, the large gears (138) are meshed with the second gears (136), and the large gears (138) are meshed with the middle fork drive racks (204).
6. The overload telescopic fork according to 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).
7. The load calculation method of an overload telescopic fork according to any one of claims 1 to 6, wherein: f (F) 1 And F 2 Loads between the upper fork assembly (10) and the middle fork assembly (20), F 3 And F 4 The loads between the middle fork assembly (20) and the lower fork assembly (30) are respectively:
。
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| CN115285896B (en) * | 2022-09-30 | 2023-03-21 | 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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